Suzuki 9.9hp to 20hp conversion - DF9.9B to DF20A

[@bobhughes7030]

Thank you for this clear, easy to understand video. I converted mine today. My 14 foot Jon boat went from 6 Kts max (no plane) to 18 Kts. All for $400! Very much appreciated!

[@Testikels1]

I did the upgrade from 9.9 to 20 hp. And it worked. Unbelievable what a difference that makes. Never knew the 9.9 was capable of doing the things I experienced yesterday. Boat comes easily in plane now. And speed is Unbelievable! Thanks

[@laingej]

@Erwin : mind blowing right? 😀 awesome! You welcome. Since the upgrade i have only gone back to 9.9 once. I love the extra power. Really the 9.9 motor was born a 20hp. The factory restricts It to half the hp to sell a 9.9.

[@samuelpollak964]

@@laingej how much does the controller cost and where can I buy it? Thanks!

[@renegademind1833]

Do you know what oldest year model 9.9 the conversion kit will work? I'm looking at a 2008 - 4 stroke.. appreciate any comment.

[@srileo]

This is a great public service! Really helpful video. Thanks for doing this.

[@laingej]

You welcome. Glad it helped you. others have helped me i like to do the same

[@rmtackle]

Thank you for this video! I think you just sold me on the 9.9 and the upgrade for sure! 👍🎣🎣

[@stevenkramer587]

I love that you did this video! The part of AZ I live in has a hp limit of 10 hp. So I ordered the 9.9 and when I go to bigger lakes and rivers ill do the 20 hp thing and be much happier! Thank you!

[@egresk1]

You can also buy a 20hp and put 9.9 decals on it.

[@paulsongy6869]

Thanks for both this and the Speed test video. Don't know Why anyone would give these a thumbs down?? You provide a Great Service. The 9.9 Allows access to limited H.P. Lakes as well. Love that your Son is there with you!

[@mikedee5253]

Thanks for this excellent video ! I just bought a 27' 7000 pound sailboat that came with this 9.9 HP engine in an extra long shaft (25") model. You may be interested to know the 20 hp model is not available with the extra long shaft. Doubling the HP will make motoring into strong head winds and currents WAY more doable. This is a game changer for those of us with heavy displacement sailboats, thanks again !

[@freelectron2029]

lol heavy displacement.

[@donc2334]

I'm in a similar boat (nyuk nyuk!). 29ft about same weight as yours. About how much extra speed did you gain from the change? I was considering just going up to 15 by changing the plate. Thanks. DonC

[@1224Peterson]

Ok, I recently did this conversion, and did so after speaking to a Suzuki tech who said the ECU from a 20hp is not needed, the stock ECU will adjust to the added airflow just fine and it did. Runs great, I even checked the spark plugs and they look good not running rich or lean.

[@mightypebble5457]

What model year is your engine?

[@1224Peterson]

@@mightypebble5457 2021

[@janbergendahl]

@1224Peterson What year model do you have?

[@SavageBrain1948]

Thank you! Thank you! I ordered the parts in the video from the same place you got yours. Install was easy. Also changed to 11 pitch prop as you suggested in your other video. My 10’ Caribe flies. Got 24mph. You Da Man!!!!!

[@laingej]

Awesome!! Buddy

[@RCFlyBoy]

I guet 28.6MPH on a 14 foot fiber glass fishing boat if It's only me a my kid on board. This is from the 10 inch pitch prop. So maybe with your boat, you are over proping it, preventing max RPM? Install a tach and see if you hit 6300RPM

[@JiggyC]

What kind mpgs were you getting before?

[@patonbike]

one thing that is interesting, suzuki doesn't make a 20hp console steer model, but they do make a 9.9hp console steer model. DF9.9BT EFI - so this could be a way to get a 20 hp console steerer.

[@ekimandersom4478]

Sure they make a 20hp console steer model

[@mackyjanal4850]

They definitely make a 20hp steering

[@joetousignant9130]

Great information and well done. Thank you for sharing! You are helping folks out who are stuck with 10 hp limits and have a fat friend to fish with! LOL

[@laingej]

@joe hahahaha

[@laingej]

@@TampaTom lol i have had my wife and two kids just little over 500 lbs with the 20hp planes fine! Top speed was reduced to 22mph from 27mph but still alot of fun. 9.9 struggled to hit 16mph with all of us

[@Wyttyd]

This explains a lot for me. I had noticed that a lot of these 9.9 and 20 hp motors had the same displacement. I thought it was just a typo. Basically either just charging you an extra few hundred dollars for a better ECU which cost the same as the lower horsepower to manufacture.

[@jjs3287]

I hope you are wrong as i have just paid £3,000 for a 20hp Tohatsu when the 9.8 was nearly £1000 less......

[@mazdarx7887]

It's not better ECU, etc, it cost of production, 9.9, 15, and 20 all have the same tooling, easier on inventory with just a few easily changed components and labels. If there is a big demand for 9.9's, no need to start making more, as in this case, change the restrictor plate, and labels and good to go. Cost of production reductions is profits

[@PhilTParker]

This is amazing. I just bought a new Mercury 2021 9.9 and will be in hour #2 of breaking it in this morning. I am blown away that horsepower can be doubled with such little effort!

[@patrickfearon7942]

How’d that work out for you?

[@rakeshviswambharan8317]

LaingEJ, Awesome video buddy.. Keep up the good work to educate rookies like me who is about to get his new outboard for the first time.. Found it very useful. I was leaning towards Merc 9.9 but I am now thinking of Mercury 9.9 due to it longevity and easy maintenance

[@roblebeau7169]

Really appreciate your videos!!!! I’m ready to buy the 9.9 Suzuki for a newly purchased 13’ Saturn Azzurro Mare. Wanted to follow up and see how the 20hp conversion is doing. Thank you, Rob

[@laingej]

Doing great i go out with the 20hp option all the time.. i find it hard to step down to 9.9 😂

[@jesseashmore8426]

Dude, this is going to save me so much money. I was about to buy a 20 for my Jon boat!

[@jesseashmore8426]

I commented before he said that the parts make the 9.9 cost as much as a 20....sad

[@laingej]

Lol yeah depends where you buying from... you might save money. At the time i purchased my motor 9.9 was $2300 a 20hp on the same trim level $2700.. parts to make the 9.9 a 20 $417 .. but i said this before.. if you get the 9.9 save money first later upgrade and you have to power options in one single motor.

[@jesseashmore8426]

@@laingej www.rembulanfishingstore.com/2019-suzuki-20-hp-df20as2-outboard-motor/ They have a 20 for $1567. It's the bare bones model but that's all I need.

[@sellbyowner9340]

@@jesseashmore8426 just be careful, i wouldn't buy from that site. buy it from local dealer. when in doubt, search anything follow by the word "scam" and see if you can trust the site. in my opinion, don't buy from unreliable source.

[@jesseashmore8426]

@@sellbyowner9340 I think I just found a 9.9 Yamaha 2 stroke on craigslist. That should be plenty for my 14' Jon. Right now I've got a 2.5 nissan and it's utterly pathetic...I didn't know boat motors were so lucrative.

[@jettamaster3297]

interesting video! It would probably be way cheaper to have the stock 9.9 ecu flashed with the 20HP map file than buying the new $400 ecu...

[@sfbayarea209-fish-n-missio6]

Very well edited and generally good video. Thanks for the content 👍

[@joetousignant9130]

This is totally legit! Suzuki made a 20 hp motor and detuned it to sell 9.9 models. You don't need to buy the seal, ONLY the flame arrestor and the ECU. You can put the flame arrestor into the existing rubber gasket. But no doubt, this turns your 9.9 into a 20 hp. The ONLY part numbers that are exclusive to the 9.9 are the restrictor plate and the ECM. After doing the change, the ONLY part numbers different between the 9.9 and the 20 are the decals!

[@laingej]

Yes but i wanted to keep all the 9.9 parts unharmed to swap back to 9.9 if i want to. The 9.9 restrictor comes attached to the seal to remove it you have to cut some rubber rivets then will spin.. did that before. And has that star shape inside. The 20hp seal is smooth on the inside endge and the flame arrestor removable

[@RodrinBird]

That’s awesome! I wish I could do something similar with my Yamaha F9.9

[@Cutlass_Rudd]

Probably can, if you look most new 9.9's weigh the exact same as the 20's meaning they're probably the same like this one

[@evert-jansterkenburg295]

@@Cutlass_Rudd they're different engines. The 9.9 has 212cc and the 20 has 432cc.

[@Cutlass_Rudd]

@@evert-jansterkenburg295 Same block = same weight, 20 is just bigger bore and stroke

[@evert-jansterkenburg295]

@@Cutlass_Rudd nice to know, i wasn't aware of that fact! But it's not as simple as change a restrictor and slamming in a new ECU, I suppose, to get to 20hp

[@noalpitzoff1088]

I noticed this the other day comparing mercury engines. If they have the same displacement, bore, stroke they are the same engine de tuned. Doing this might void the warranty though. That being said when the warranty is up I’m doing this lol

[@davidconn3222]

that was alright for sure

[@rohtdnivio]

Great :-) Thank you for posting !

[@laingej]

You got it !

[@adamstewart7465]

I took the restrictor plate off the red dragon. Keep it on the down low, it's not exactly street legal.

[@edwinlaing9834]

Yeah some places dont care .. others have rules gotta check your local laws but nobody would know 😜

[@benniethejew]

Good thing you don't have to use it on the street!

[@MatanuskaHIGH]

Edwin Laing joke went right over your head

[@MatanuskaHIGH]

benniethejew movie old school...... it’s a reference/ joke from the movie

[@benniethejew]

@@MatanuskaHIGH can't quite place it but I was being silly just as you were maybe I'll search the movie clip this evening when I have some time

[@Oscar-og3ep]

Hola,porqué se calienta la junta de la culata de mi motor suzuki 15cv si refrigera bien puedes contestarme por favor?

[@nanukbigwithe]

Suzuki 9.9hp to 20hp conversion - DF9.9B to DF20A

[@jimkonst]

Thanks for this video! After watching it, I went out and bought the Suzuki 9.9 2022 model. It seems identical to yours, electric and recoil start. I was just watching it again to make sure I got the parts right before ordering them. And then I wondered. since they are Mitshibushi parts, would they be cheaper if bought from Mitshibushi? I am researching this, but wondered if you, or your readers, already found this out? Please let me know what you found. I am not going to convert it until I am sure the 9.9 won't do the job adequately.

[@craigolio1]

Thanks for making this video. I am trying to decide which motor to buy for my Saturn SD330W, and I like the idea of buying the 9.9, but having the option to 'hod rod' the engine up to 20hp if I find that the 9.9 doesn't satisfy me. However, I was originally planning to buy a Tohatsu 9.9. First, I looked for video examples of someone who had converted a Tohatsu, but I could not find any such example. So, I looked at the parts catalog for the 2020 Tohatsu 9.9 versus the 20hp. Just like in your example, the only difference in parts between those two motors is a different size gasket, a different ECU, and the fact that the 20hp Tohatsu does not use a restrictor plate. But there is one BIG difference: The Tohatsu ECU costs about $850 compared to $450 for teh Suzuki one! Unless there are noticeable feature benefits on the Tohatsu, I think I'll just buy the Suzuki. Thanks again for your video and the information!

[@joetousignant9130]

I will add, the standard 9 pitch prop is perfect for my heavy boat with a heavy fishing partner after doing this mod, so I don't have to buy a different prop. when I'm alone in the boat I can push the RPM limit of 6300 but just barely.. so I don't even have to buy another prop, just back off a little bit when I'm alone in the boat. RPMs are perfect with the mod...before it was 8.5 mph at 4000 rpm, after it was 15 mph on plane at about 6000 rpm with my heavy partner in the boat. perfect!

[@laingej]

Awesome. Yes i still use my 9” prop when im loading it heavy. The video i have with 700 lbs two grown men on my kaboat i was using the 9” and same thing i just know not to go WOT or it will over rev. But sometimes you want that lower gear torque to move the weight faster rather that top speed .

[@beyondupnorth]

When its just you in the boat does the motor hit a rev limiter that makes it cut out for a second? My 15 with a 9 pitch at full throttle, runs perfect for 3 seconds then a quick stumble/or miss then good for 3 sec repeat... Back slight off the throttle and it goes away.

[@laingej]

@@beyondupnorth when you hit rev limit the red light starts flashing if you dont decrease the rpm within 10 seconds it will cut off the injectors to decrease the rpm by itself. i have not gotten to the point pass the flashing light so i never see mine cut off. Seems like you have something else is your light flashing?

[@beyondupnorth]

@@laingej No red light flashing, I'll have to check it again, but stumble repeats every 4 seconds or so until I throttle back a hair. New 2018 model last summer has done since I finished break in and opened it up

[@tonymallia1940]

@@beyondupnorth I have the same issue with my 15hp. I think im hitting the rev limit intermittently. Did you ever figure it out?

[@jamesvanderpas7074]

Can you please publish the full Model Code Sequence of your engine, with elect start, and Tiller steer wit 15" shaft, etc? I believe what you have is a DF9.9B series at is in the same class as the DF20A and DF 15A. I notice that there is a DF9.9A series which is in a different model group. Please clarify what you have. Please include the codes that follow the B Series designation. Thanks. Your videos sold me on getting a new Suzuki!.

[@laingej]

You are right and mine is the DF9.9BES2

[@rodneygreen9968]

If the cylinder is the same for both, then all you change is the intake & rpms. It's about the same as the older 2 Cycle Engines of yester years.

[@laingej]

More air more fuel and more rpm

[@DeepBlueChannelCom]

good video bro eso mas tork mas fuerza zusuki❤️❤️❤️❤️❤️❤️❤️

[@laingej]

Si es el doble de caballos 🤗

[@TDMayday]

What was the website that you shopped to buy the stuff? I just bought a brand new EFI 9.9 Suzuki. I wanted your video but on my phone it’s hard to see and you went through pretty quick.

[@michaelgibbons1214]

Would it be financially better to buy the 20hp and just switch out the 20hp sticker/decal for a 9.9? Seems those parts are pricey and the work to swap them.

[@johannesvanhoek9080]

I really appreciate you 👍👍👍👍👍

[@laingej]

Thank you

[@Moondog9322]

Really nice job, as always. I"ve watched this video a few times and and intrigued by the possibility of converting mine. I mostly use my 9.9 for trolling but occasionally go to smaller lakes with 20 HP limit. I do really like how my Suzuki can maintain a very slow trolling speed in colder weather....wonder if I could achieve the same speed as a 20??

[@martyhonda6983]

Restrictor plate = NASCAR. Are the lower unit 20 hp part numbers the same as the 9.9? This was too easy ! Nice job

[@josephporten6654]

Thank you so much for putting this together. Probably a difficult question to answer however I will ask it anyway for anyone who may have an opinion. Is it likely there will be a similar strategy for the new 2023 models that are out. I'm getting ready to pull the trigger on a new (in 2023) 9.9 BTHL5 and will be curious if a conversion to a 20 hr will be possible in near future. Thanks again for this. It is fantastic.

[@WillemLuntungan]

Thank you

[@TomONeilNZ]

Great video. what year is your motor please?

[@SUPERPACU]

Hola Lian! me he hecho fanático de tu canal, felicitaciones desde Argentina, tus videos me son de GRAN AYUDA. Quería hacerte unas preguntas, dada tu experiencia. Tengo un velero de 26 pies, compre el DF15 modelo 2019 (pata larga) y quiero actualizarlo a 20 hp Puedo hacerlo con las partes del DF20 modelo 2020? También consultarte acerca de lo sumergido q debe estar el motor para su correcto funcionamiento, he visto en tus videos q siempre está sumergido unos centímetros por debajo del Lower Mount Port Cover, en mi caso, este mismo, siempre esta completamente por debajo del agua de 3 a 5 cm (de 1 a 2 pulgadas, al menos). Por supuesto esto es siempre con la embarcación amarrada y sin nadie abordo. Crees q debería estar menos sumergido? Saludos y Gracias!!

[@seanstrickland4970]

Great video man

[@ebaygoer8593]

I guess if you already have the 9.9, this makes sense. However, if you're buying the engine new, it's cheaper to buy the 20 than it is to convert a 9.9 to a 20.

[@stevea6722]

ECM has a Mitsubishi insignia molded into the case

[@danieldumanescu]

First of all, thank you for the great videos, including the other one with the propeller comparison. I`m looking to buy the DF15A since this is the maximum my inflatable is supposed to be able to withstand. But you never know what the future may bring, so this video definitely caught my attention. However, there is something I do not understand: the official Suzuki brochure lists DF9.9 and DF15 with a 44 kg weight (97 lbs) whereas the DF20 is supposed to weigh 48 kg (106lbs). Where is the difference coming from? I doubt the DF20 is sold with a 4 kg / 9 lbs heavier propeller... :)

[@laingej]

@danieldumanescu : youre very welcome. The 106lbs is the electric push start model.. thats the one i have ! is a little heavier mostly because of the starter motor.. the pull cord start models are 97 lbs

[@danieldumanescu]

@@laingej That makes sense. Thank you!

[@CarterQuillenP.E.]

Is the valve gap spec. the same? The owners manual actually calls for adjusting the gap periodically which is a pretty involved procedure that I have been ignoring on my 15hp version of this motor. It's been two years since you posted this. Have you had any problems in that time?

[@janbergendahl]

@LaingEj Some claims of this works fine without the ECU change, have you tried with original ECU and if not, can you do it to confirm? It is suppose to add for the increased air volume anyway..?

[@TDMayday]

I just bought a brand new 2021 Suzuki 9.9 fuel injected. Followed your instructions and got the ECM and the flame resistor with the silencer. But I noticed you talking about propeller pitch. What comes on these motors from the factory? Is it the 9 inch pitch? And if so should I switch to a 10 inch pitch? What’s the difference between an 11 inch pitch and a 10 inch pitch?

[@donc2334]

My question to you and anyone in the group who completed the upgrade to either 15 or 20hp is whether a noticable increase in power was noted at low to mid RPMs, or only at the high end because the WOT max was increased? For example would I expect to have greater speed (and therefore greater fuel consumption) at say 3500RPM (my expected typical cruising speed) after converting to 15 or 20hp? Thanks!

[@yavuzcileli8784]

Thanks dear brother 👍

[@josefranciscocarrascosafer1379]

Gracias

[@laingej]

De nada

[@walkertongdee]

The kid was a plus added a dimension.

[@jacobhatty6960]

Dude, you are the man! Question- are you curious how the performance kaboat may have handled this higher hp? Because of the inflatable v hull? I'm interested in your thoughts.

[@laingej]

Maybe , i never been in one of them but should cut the wakes better. I have to slow down in mine for other boats wakes or im flying in the air like hitting a speed bump lol thats the down side of more power on inflatables. Does great on a flat day. But yeah with higher speed the harder it pounds.

[@midlanticfishing5405]

Good stuff man!

[@RCFlyBoy]

Been watching your videos for a while and in February 2021, I bought a 2020 9.9. The dealer told me it was new but it had a few small scratches. It now has 25 hours (from me) on the 9.9 ECM but the red light never flashed to tell me the the 20 hour service was due? Did you change the ECM before 20 hours and did your 20HP ECM start flashing after 20 hours? I since put the 20HP ECM and have about 25 hours on that one as well and still not flashing light. When I went for service, the service guy told me that someone had reserved this motor but ended up changing his mind. What I suspect is that they took the motor back after the guy ran it for more than 20 hours? Thanks in advance

[@michaelgibbons829]

I was seriously considering doing this but I need to find out if it’s better money wise to buy the 20hp and replace 20hp sticker with 9.9 sticker.

[@laingej]

You know i tought about that too but liked the idea of have two outboard options.. like right now im going to do alot of trolling gona get cold i wont be going fast so i switch back to the 9.9 with a 7” pitch prop .. gives me more flexibility having two power options

[@blueangel12037]

What are the chances of getting caught on a 9.9hp lake with this conversion? Also, would it be cheaper to buy a 20HP and just swap the sticker, or is it stamped 9.9hp?

[@dainsookdeo7086]

Nice will try 👍 what site did you order your parts from?

[@AntonHu]

Two queries arise for me. First off, unless the water you're sailing on has restrictions, why ever return to the 9.9 set-up? I can't believe the fuel consumption is improved by that restrictor plate except by stopping you using more power, but if you don't... Secondly, is it worth the extra cost and weight, plus battery hassles of the electric start? In your videos, starting seems if anything even more instantaneous with the pull-cord.

[@edwinlaing9834]

The electric start model comes with an alternator. Can keep your battery charged for lights and every other electronic. Pull cord doesnt. Main benefit

[@AntonHu]

@@edwinlaing9834 Thanks. A benefit for many, maybe, but I have an alternator on my Tohatsu 6HP 'saildrive' and don't have it wired up - the engine only runs for short periods entering or leaving the marina; it's main problem is starting reliably with a sensitive choke.

[@SaltWaterBassTv]

Nice how did u discover this mod? Difference between a and b motors is?

[@robertsatoer4668]

Hey laingej U convinced me to upgrade my ECU, but the dealer told me that I've to do the break in period again. This because all data is not copied ofcourse. Is there a way to skip the break in period in the software (I also bought after watching you're vids) thanks in advance Greetings from the Netherlands robert satoer

[@adamcunning]

Do you happen to know if this will work on older models? 2009 9.9 DF to be more exact.

[@bardpleym4310]

Thanks for the video. I have the 2017 suzuki 9.9 and changed the restrictor ring and propeller. Do you know if i would get more effect if i also change the ECU?

[@donc2334]

It seems there are at least 2 choices for the 20hp ECM and that choice depends on what year and variant of the DF9.9 you are upgrading?? Could you (or anybody else) please help me decide whether the part you installed (33930-89L20) or the 33930-89L30 would be better suited for my engine (DF9.9BT: 2021, with electric start, power trim and remote control (not steering)? Many thanks

[@robcomerford3172]

Great video, thanks for the tip. I have a 2019 9.9 I'd love to upgrade. How did you match the ECU for the correct 20hp model?

[@laingej]

Matching to same year 20hp so look for the 2019 and make sure if you have a starter motor match it to the starter model 20hp

[@danielguimond8295]

Great video, I didn't know that the air intake was so restricted on a 9.9. On my old Honda BF15 the manual specified different spark plugs heat range for the 9.9 Hp did anyone tried a colder range? As for the propeller the torkier 20hp could benifit from more pitch, thanks again!

[@sellbyowner9340]

At 2:52 after you put in the new restrictor plate, is that for more air intake? On the top it said "engine oil", can engine oil get in there that air intake or suppose to be only air? Why there is a big label saying ENGINE OIL if it's air intake I'm curious.

[@laingej]

Lol that is just the engine oil information sticker type and quantity

[@sellbyowner9340]

@@laingej funny right

[@omieyouknowme]

Neat, same Mitsubishi made ecu as Yamaha.

[@laingej]

Yeah many parts are mitsubishi.. the starter too

[@omieyouknowme]

@@laingej just looked at my ECU, looks identical to that unit. I bet tohatsu uses em to, and everyone licensed it. Which means u can/could take a 9.9 tohatsu to 20hp as well.

[@laingej]

@@omieyouknowme yes someone told me you can do the same with tohatsu.. just restrictor plate and ecu but didnt know the ecu’s were the same mitsubishi one thats interesting

[@bobmuchler]

I'm currently waiting on parts to upgrade to 20 but don't know which prop I will need.which of the three you have work best on 20hp?

[@ryantoner3367]

I was not able to find any information if this is the same ECU for a motor that has controlls instead of a tiller motor. I have a 2022 df9 with controlls.

[@hugoohlsson1057]

Thanks. But I got some issues because the engine don't start after I have change the ecu... I have a 9.9B from 2014 and I buy the ecu from the same gear as the 9,9. Do you have som idé?

[@walkertongdee]

But when you sell the 9.9 parts as new never used on Ebay you come out ahead. surprised this was not thought of...

[@laingej]

Yes you could sell the 9.9 ecu if you dont want it but if you still have warranty keep it

[@otschannel9859]

good info

[@Testikels1]

Just a question? Did you also change the prop? I believe the 9.9 prop is different than de 20. Or didnt you feel the need after testing the 20 hp upgrade?

[@laingej]

Yes i had to go with a bigger prop because with the stock 9” it would over rev . I have a video testing props.. a 10” and 11” are ok

[@Testikels1]

@@laingej what you suggest for a 4.95 mtr boat? Type is Gentle 495. A 10 or 11 inch prop? I think the 10 is more agressive in the throttle compared with the 11

[@tray22]

Does anyone know if there is a difference between the 2020 versions and the 2022 versions?

[@jenniferharden8025]

Have you tried running it yet without the 20hp flame arrester? Speed increase? Safe enough. Most two strokes don’t have any flame arrester. Thanks.

[@laingej]

No i have not tried but highly doubt will be anything noticeable. Maybe in the rpm very tiny bit

[@jenniferharden8025]

That mesh has area, takes up space and creates turbulent air flow into the throttle body. I’ll let you know. I have the 15 that I have converted to the 20 hp with a 10 “ pitch stainless on a 12’ aluminum. Thanks for all your videos. They’re great!

[@ivannaumov461]

@@jenniferharden8025 The mech mainly acts as a safety device, preventing dirt entering the engine

[@rolfern____72]

Is this only for 2014 and up? Or could I do this to my 2012? Im pisking it up sunday, sp exited

[@tjvd]

Thanks! What would be the steps to go from 9.9 to 15? Is only changing the restrictor ring sufficient?

[@laingej]

you would need the 15hp ecu to get the 6000 rpm redline. Costs the same as doing in the 20hp convertion so why not get 10hp instead of 5hp for the same price

[@jjs3287]

If this is the same situation with a Tohatsu then does that mean. I have been totally ripped off buying the 20hp from the get go?

[@mazdarx7887]

The reason for buying the same motor but with a lower HP rating , then upgrading to higher power with easy simple component changes like this vid is labeling. Nobody, without taking the motor apart would know it's a 20 instead of a 9.9. Now he has a 20 on his boat rated for 9.9 and pays cheaper insurance

[@ju2067]

Is it just the high-end power that is different when you do the mod? I.e. low-end torque should be the same? I'm mostly interested in better towing the kids in my little 10 foot RIB. Have a 9.9 Merc at the moment but would like to be able to take 2 adults and 2 kids on the lake to tow an inflatable tube. The 9.9 works well when it's just me and one kid but I think it would struggle with another 250lbs (1 more adult and 1 kid).

[@laingej]

It becomes a new beast.. the very second i twist the tiller its got more torque. Im Sorry this wont work on your mercury thou

[@ju2067]

@@laingej Ok, great. That's good to know. I was thinking of getting the 20hp for my boat.

[@CUBICHI1985]

Man this is legit awesome!! I want to upgrade to a 4strk, currently have a mint condition '97 Johnson 15hp 2strk. Would like to sell it and get a newer Suzuki 9.9 and do this to it. Where I live there are some lakes with a 10hp or less restriction, so this would be perfect. How much do you think I can expect to pay for one (and where may I find a good used one)? Also, how much do you think I can get for my 15hp Johnson? Thanks in advance 🙋‍♂️

[@laingej]

A brand new 9.9 suzuki will run around 2300 and up i seen used older ones still hold their value seen around 1800 .. dont know what your jhonson is worth it depends

[@CUBICHI1985]

@@laingej put mine up for sale, got a guy coming to pick it up today. I also found a used 2020 model for $2500 being sold locally. But I'm not sure what model exactly it is, ad says it is a DF20ATH..? I know that is an electric statt with power tilt/trim, but not sure what shaft length that is... also, what exactly is the difference between DF20A and DF20B. Do you think it's a food deal? I have not been able to find those prices (2700 for a 9.9) online.. thanks in advance for your input.

[@CUBICHI1985]

It looks like it is an EFI.. This is what the AD reads exactly: make / manufacturer: 2020 Suzuki model name / number: DF20 ATH Suzuki EFI DF20 ATH Suzuki EFI. 12 amp alternator. Electric start and pull start. Trim and tilt power tilt. 15 hours on it. Need 25 hours for first oil change. Great little motor. Very quiet and smooth. Run all day long on less than 3 gallons of gas. Retail $3345 + tax. Will take $2500 firm. Reason for selling is bought a new boat.

[@gckshea]

I looked in the Description..where did you source parts?

[@claudelessard99]

Did you notice a difference when trolling ? If I make the change would I be able to troll again or would it be too fast?

[@laingej]

@claude. The propeller change the trolling speed. With the 20hp 11inch prop is too fast to troll .. the 9 inch prop is better slower trolling speed

[@steveleston1848]

I thought the suzuki didn't need a battery to start?

[@floridamansgarage8629]

I have a 2022 mercury 15hp EFI if I change those 2 parts do you think it will work? The 15 and 20hp are the same exact motor I’m trying to get to 20

[@justinprocopio2802]

Awesome video. Could this be done to convert a Suzuki 25 a to 30 hp?

[@laingej]

I have not looked in to that.. dont know the details but yes i know the 25 and 30 are the same 3 cyl engine .. just figure out what the difference is and swap the parts

[@justinprocopio2802]

Hey thanks for the response. Looking at the specs the 25 and 30 are identical besides the ecu. Cant really tell if the restrictor plate differs, but seems like it should just be those two to convert to a 30. Great videos, not much info on suzuki's out there so it really helps

[@1224Peterson]

Are you absolutely sure you need the ECU from a 20hp? I spoke with a former Suzuki tech and he said it's not needed, that the 9.9 ECU is the same and it will adjust to the increased airflow

[@travismorgan4249]

I have the 9.9hp and installed a tachometer to track RPM and hours. My 9.9hp hits the rev limiter at 5,700 rpms which is also what the manual says the 9.9hp max RPM is. The 20hp max RPM is 6,300 , so yes the 20HP ECU is required to at least get the full RPM range of the 20hp. I also am betting the 20HP ECU has different fuel tables

[@1224Peterson]

@@travismorgan4249 Doubt it, the air flow meter adjusts the fuel if there was an issue the plugs would be too lean or rich but they have been perfect which tells me the ecu is doing it's job. All I did was swap out the air restrictor and put an 11 pitch prop on it and it's been running great for months now. If I'm missing a few hundred RPM who cares it's not worth $400 to find out even if I am or not the motor is running great with no issues.

[@SuperMegaPops]

thanks!

[@stupidpeople1012]

Great video can you tell me what the ecu number is for a 2017 9.9 fuel injected Suzuki pull start is?

[@laingej]

I just checked uses the same as mine 33930-89L20

[@donc2334]

@@laingej LaingEj, How do you go about checking (ECU compatibility)?

[@TheTojocat]

Could you not just have removed the restrictor plate and not put anything in? i know the part was cheap but may have meant more air intake with no plate at all.

[@laingej]

@Tom Tom You could but the mesh is actually a safety device.. help prevent motor catching on fire if it backfires out the intake. And like you say its cheap so why not put it on.

[@MiguelFishing]

Hi is possible doing this in 9.9 2 stroke ?

[@simonf1833]

I have a suzuki 8hp 2021 Ist it possible to upgrade the 8hp to 9hp? What is needed to change? Thx

[@srileo]

It is a shame though that the ECU is $450 something. I wonder if there’s a way to reprogram the ECU instead of swapping it out.

[@laingej]

Theres a way to flash it im sure.. but couldnt find any information on anyone that has done the work. :(

[@johngriffin5446]

That's what I was thinking too!

[@ivannaumov461]

@@laingej Yes there is a way - what you need is a programmer like Piosini ver 4.3 (abt 60 US $) and a bin file from 20 hp engine. It is advisable to use soft from the same year model engines and MANDATORY from the same model line - i.e BS for BS, BRS for BRS etc. Otherwise you have a problem. First you save the original file from you ECU. So if you need to go to the dealer, you can reflash the original. But I have not heard about any major problems directly related to ECU flashing. Ther are a lot of 9.9/20 around here which are 6+ years old now. If you need more details, please feel free to ask.

[@laingej]

@@ivannaumov461 nice! Have you done it? I read about it in some forums but could not find anyone that actually did it. Thats would save you at least $300.

[@ivannaumov461]

@@laingej When I bought the motor back in 2015, the process was not public yet, so I paid about 100 $ to somebody who did it for me. Now you can find it in the Internet. This link kzbin.info/www/bejne/mXiVonqJrdWcgpo - was published in THIS discussion comments some time ago. Its in Russian, but you can understand the process. All the necessary files are in the comments below the video. If you do not understand something, I will try to help

[@TheCobovn]

Does this work on DF9.9BTHS3 model? mine is powered tilt. Just want to confirm before I buy. Thanks for the video.

[@laingej]

@thecobovn Yes. Doesnt matter if its power tilt or not. What matter is matching the ecu to “electric start” or pull “cord start only”

[@gabrielmoldoveanu8212]

I have Tohatsu 15 hp efi, 2018 and I want do the same thing to convert it to 20 hp but...ecu cost 800$! I wonder if is possible to re programm my ecu to 20. I think is the same only software is diffrent....

[@calebfolse5854]

anyone know if this only works on 9.9 engine? i have a 15 that i want to upgrade to a 20.

[@kitchensnsync]

I wanted to ask if this would work for the 15 hp Suzuki could you convert it to a 20 by changing out the restrictor plate and the ECM, or is exclusively only for the 9.9 hp to 20 hp?

[@laingej]

You sure can do it to the 15 too and gain 5hp more

[@guytourangeau7335]

CAN you trolling wit This motor 9.9 wit a fiberglass 12 feets and thé modification can do the in slow speed

[@KARLOSYT]

I have a suzuki DF9.9A 2014 pull start, can I raise the power in this model?, if so, how?

[@radekgajak3247]

When I can upgrade to 20 hp..before brake in or after so I don't ruined the engine