Outboard jacking plate and race propeller test.

[@mjhmech4903]

Glad I'm not the only one who gets a silly grin doing this kinda stuff!

[@25hpboatracerman]

Your definitely not the only one 😁 It’s so much fun 🤩 Cheers Aussie Boat Guy 😎

[@frallorfrallor3410]

i didnt know a 5hp could be this fun 👍 great job coolest 5 hp surfacing video i ever seen

[@25hpboatracerman]

Me neither 😂 I’m having a blast Cheers 🍻 Aussie Boat Guy 😎

[@bevanpike5976]

If you ever decide to visit New Zealand, there is an annual event called the waikato seagull outboard regatta this has been happening since the 1980s, basically a 2 day event where you race seagull outboard motors along 145km of New Zealand longest river, last year the event has opened a 5hp outboard class that can be from any make and model. The environment and nature of the waikato river itself makes it worth while.

[@25hpboatracerman]

Hi Mate, Now that sounds awesome 👏 I will look into that, maybe I can take my motor as carry on 😂 it’s under the weight limit. Great that they allow 5hp now too. cheers 🍻 Aussie Boat Guy 😎

[@ThePopypete]

Good stuff 👏 😉😁 . Thanks for the idea of a jacking plate 😉🤗 .

[@25hpboatracerman]

Hi mate, No problems champion 👌 all the best, Aussie Boat Guy 😎

[@duncanmcauliffe6673]

Love the footage looking back at the prop to man and the rooster tail you've gotta be pretty happy getting 45km/h out of a five imagine the looks you'd get overtaking crew I reckon it would be priceless. Love your vids aswell you keep answering questions that pop up in my head an teaching me a thing or two cheers man 🤘

[@25hpboatracerman]

Thanks Mate 👌 Yeah I’m really happy with it and also looking forward to overtaking some 15hp tinies 😂😂

[@Spider-dark067]

@@25hpboatracermanI got a 10ft w a 15 but it’s uncontrolled. I think I need to lift my motor how you did. I know for a fact it’s too low. But my boat will definatley outrun you at 27mph set up the right way. Right now you’d blow by me bc of how uncontrollable my boat is 😂😂😂 it’s scary.

[@Phil-bz1kz]

Thats some fast 5 horse. Love it

[@25hpboatracerman]

Hi Champion, Cheers 🍻 Yeah, it goes awesome All the best, Aussie Boat Guy 😎

[@robinoliverjenal1785]

Haha...thats totaly incredible..very interesting and funny..zooming past those with 15hp whit a fiver

[@douger1517]

So much fun..that’s good figures from a 5hp. Must be a good boat to handle all that power.

[@25hpboatracerman]

Cheers mate, Yeah, it’s been a blast, loved every second on making that boat and modifying that 5hp. Onto a 9.8 now 😁 All the best Aussie Boat Guy 😎

[@rrrttt1112]

Awesome stuff! Love it! I have 2 of these motors, been considering doing some of this to one on them in the future.

[@25hpboatracerman]

Cheers mate 👌 Yeah, it’s super fun All the best Aussie Boat Guy 😎

[@chrishaigh82]

thanks for the video. I watched one of your shorts and wondered how you got it on the plane with the motor so high... then found this. you played with an on the go, adjustable jacking plate?

[@25hpboatracerman]

Hi Mate, Thanks for your comments 👍 It’s a fixed jack plate, it is hard to get on the plane but gets there eventually 😁. The propellers are specifically designed to work surfacing the water, a standard propeller would not get on the plane or work at that height. Cheers 🍻 Aussie Boat Guy 😎

[@chrishaigh82]

@@25hpboatracerman your videos make me miss screwing about with tinnies back in South Australia

[@jackross2524]

That’s flying for what started as a 5hp! Just goes to show how much extra speed can be achieved just getting the prop and engine height right

[@25hpboatracerman]

Cheers mate, It’s been so much fun. All the best. Aussie Boat Guy 😎

[@akhector]

Love it! Awesome video well done, dope AF!

[@25hpboatracerman]

Cheers mate 😁 It’s silly but I’m having a blast with the little motor

[@akhector]

@The Aussie boat guy. yeah love how there is no apparent reason for it, just for the fun of it!

[@25hpboatracerman]

@@akhector Cheers mate 🍻

[@bradleyfarquhar2023]

Not bad for a 5 getting up there with the speed good job mate. U got to love a modified motor woohoo.

[@25hpboatracerman]

Yeah, having so much fun with this little one mate. Cheers Aussie Boat Guy 😎

[@josephhalwagy6435]

Brilliant. well done mate

[@25hpboatracerman]

Cheers mate 👌

[@acurarl9929]

We would like to see the hight in relation to the bottom of boat when out of water pls?

[@25hpboatracerman]

Ok will do that. Cheers

[@lyleswan4106]

Dude coolest small boating video out there... please keep them coming. Could you do some videos of 15's??

[@25hpboatracerman]

Hi mate, cheers 🍻 yeah I’m having fun with this. got a few vids on the 15hp with the fish nipper vids. I do have one sitting on the stand waiting for a re-build but just need to find a crank so that bed will be coming someday 😁 cheers 🍻 Aussie Boat Guy 😎

[@DustyGriffin-l6d]

Where you finding these racing props for small engines?

[@25hpboatracerman]

Hi Champion, It’s a hard thing to find any small race props so I normally make them out of other props, I will put a video up to show you over the next few weeks. Cheers 🍻 Aussie Boat Guy 😎

[@Ljubomirgrzetic]

Hey mate, where did you find the race prop for that motor ? I have Mercury 6hp, and with stock prop I reached so far 14 knots, on a light 3.6m fiberglass boat with hand made jack plate. Many thanks !

[@25hpboatracerman]

Hi Mate, Unfortunately finding a race prop for these little motors is super hard. I was very lucky that a mate had a old prop that was used in bathtub race boats in the 80s. Cheers 🍻 Aussie Boat Guy 😎

[@treeturtle9378]

Incredible 👍

[@raymondbrucecharlie2566]

Nice sir😄👍👍👍

[@25hpboatracerman]

Thanks Champion 👍👍

[@lukewalker3905]

What’s the go with cooling at that sort of height out of the water? I’d imagine the normal water pump would not work?

[@foghole9449]

He has a lower water pickup, you can see it tapped into his motor, pickup on the boat.

[@25hpboatracerman]

Correct 👌 Cheers 🍻 Aussie Boat Guy 😎

[@willknight1005]

Well Done😀

[@25hpboatracerman]

Cheers champion Aussie Boat Guy 😎

[@ryanmifsud6596]

Great stuff ❤❤

[@25hpboatracerman]

Cheers mate, the little motor really goes well. all the best, Aussie Boat Guy 😎

[@ftroop4815]

I may have missed the info; can we get the starting transom height and final riser / jack plate height? Your work reminds me of some talented duck hunters most notably in the Arkansas area... they love to modify Tohatsu Megas (25 hp); you're 1/5th the hp yet about half or a tad more than half their speeds; pretty damn impressive numbers for the Micro Mega!

[@DktheWelder]

unreal! awesome video looks like fun i am building a longtail surface drive out of a 8.5hp chainsaw hopefully can go as fast as you!

[@25hpboatracerman]

Hey mate, Love your vids too mate, well done 👍 I reckon with the right prop and a light hull you should get it going the same speed. Cheers 🍻

[@andywocky]

Amazing! I’m new to this, have a True Kit 4m catamaran style SIB + a Tohatsu 20 hp. How would you start tuning? Experiments to raise the engine, or a new prop?

[@25hpboatracerman]

Hi mate, yep, both the propeller and engine hight plus trim setting. cheers 🍻 Aussie Boat Guy 😎

[@SaltyQuokka]

Sweet. that’s sick!

[@25hpboatracerman]

Cheers mate, I am having fun, I used to race outboards (obviously bigger than a 5hp) but I am loving trying to get more out of such a tiny motor.

[@michaelnelson912]

Too much fun - I'm thinking it's time for a competition based on the 5hp block as a starting point. No other rules - any hull, any leg, any prop, anything goes! See what's possible...

[@25hpboatracerman]

Totally agree, So much fun and I would love to be a part of that 👌

[@zefrimohd2619]

Hi, did you make any modification on the cranks in order to withstand higher rpms than factory specified? Eg welded at the crank journal or whatsoever? Anyway awesome videos....very impressed.

[@25hpboatracerman]

Hi Mate, Thanks 😊 I really appreciate your comments. I did think about it but as I didn’t go too wild with the mods as I still want it super reliable I decided to leave the crank stock. cheers 🍻 Aussie Boat Guy 😎

[@baenkt]

Awsome job rigging that boat. More people should take an interest in proper rigging! I would love to see you test what effect moving the motor off center will have. I experimented with a bigger outboard, a 115, and moved it about 9 cm to the left, seen from the aft. That resulted in a 5% gain in speed and about 10% in reduced fuel consumption. I have a theory of how it works, but its a bit long winded 😅😂 Keep up the good work!

[@25hpboatracerman]

Yeah, they do actually fit up some motors here slightly offset (boat builders instructions) which does have a good affect. I too have thoughts as to why it helps with right hand props to move the motor to the left. 😁

[@baenkt]

@@25hpboatracerman Yes, exactly. This effect is very clear when you go surface piercing. I think it was a Swedish experiment that showed that the thrust vektor from a surface piercing propp can be offset up to 17° from the centerline. Basically we turn a little to compensate, but now the gearcase isn't running true through the water...

[@25hpboatracerman]

@@baenkt Yep 👍 agree Cheers 🍻

[@baenkt]

@@25hpboatracerman Cheers 🍺

[@misterbulger]

Interesting!

[@mercmanwon]

Amazing how well the 5 runs jacked up to the moon. It would be interesting to see what you could do with a 50.

[@25hpboatracerman]

Hi mate, yeah it screams 😂 I know what I would do with a 50, same as the 30hp 3 cylinder, really hurt myself 😂😂 been there before, got the scars to prove it. cheers 🍻 Aussie Boat Guy 😎

[@Bs-fu8qi]

Can i ask you where you got the propeller from i am wondering about doing the same thing but cant find those propellers.

[@25hpboatracerman]

Hi mate, Unfortunately that propeller is incredibly rare, made in the 80s for bathtub boat racing. You are better off modifying your stock propeller to start with (as per my video) Then trying to find a tiny race prop about 11 to 12 pitch which may take some time. They do sell them in Borneo for about $700 Cheers 🍻 Aussie boat Guy 😎

[@misterbulger]

I wanna put one on my 12ft jon boat so i can get into extra shallow water. Its just got a 3hp but its lighter than most kayaks. I was gonna find a 9.9hp for my 12ft Semi-V pop rivet boat but maybe i dont need all that with some adjustment.

[@25hpboatracerman]

Hi Mate, The issue if you come up too much will be aeration and cavitation unless you modify your prop. Also where the motor picks up its cooling water needs to be under the water. Cheers 🍻 Aussie Boat Guy 😎

[@ehoddinott1]

What is the brand and model of your rpm gauge please

[@25hpboatracerman]

Hi Mate, It is just a generic cheap rom gauge off eBay. Cheers 🍻 Aussie Boat Guy 😎

[@foghole9449]

Liking that low water pickup...a must for what your doing. Just drill and tap the lower unit?

[@25hpboatracerman]

Cheers mate, It’s really easy on the 5hp, if you zoom in on the gearcase footage at the end you will see a 10mm aluminium pipe poking out the leg. The 5hp water pump is fed by a 10mm aluminum pipe, so I just bent it out the side of the case and fed it externally. Video of the gear case build coming. All the best Aussie Boat Guy 😎

[@foghole9449]

Nice, just trying to zoom in on your boat pickup now.

[@25hpboatracerman]

@@foghole9449 👌👌 Video coming anyway

[@ゴリマル-y4t]

5馬力で40km！凄いですね！ いつも楽しく見ています！ありがとう！

[@25hpboatracerman]

励ましていただきありがとうございます。 オーストラリアのボートガイ 😎

[@dionoakman9953]

Your MAD !! Would you ever cosider a new Skipper/Parsun 9.8 2stroke longshaft Tohatsu copy , as they are getting so hard to find?

[@25hpboatracerman]

Hi mate, I would not mate. A few Parsons have come my way over the years. They are copies for sure but not good ones. So inferior. hang out for a good Tohatsu, worth the wait. cheers 🍻 Aussie Boat Guy 😎

[@dionoakman9953]

@@25hpboatracerman Best person to ask for sure. I used to live on Careel Bay many moons ago. Had a Johny 4 ponies on my 16 ft outrigger. Would have been fun to wach you on your sorties. Keep it coming, learning alot of cool stuff.

[@Camac1000]

Very impressive! Any idea what pitch the propeller is?

[@25hpboatracerman]

Cheers mate 😁 Yeah it measured at about 8 x 12p

[@Camac1000]

Cheers can’t wait to see more!

[@raddeal1]

Good job bruss

[@25hpboatracerman]

Cheers mate, It’s silly but fun 🤩

[@sebastienl2140]

Enorme! i was happy to 16mph, now i need an upgrade :D

[@25hpboatracerman]

I know 😂 Have fun mate. Cheers 🍻 Aussie Boat Guy 😎

[@lyleswan4106]

Dude thats awesome... How the F does a 5 do that?! my 15 on my 3.8m sib will barely get me 22mph, any mods you would suggest??

[@chadhall9606]

How far is antiventilation plate from bottom of the transom

[@25hpboatracerman]

Hi mate, it’s about 130mm, I would have to measure for exact measurements. cheers 🍻 Aussie Boat Guy 😎

[@ЛодкииМоторы-ж1и]

Аn excellent experiment, based on the speed data of the outboard motor, you can try a propeller of a larger pitch

[@25hpboatracerman]

True, I’m trying to find one Thanks

[@damianpaul1959]

Sir,..we are in malaysia we modified it exhaust too,..so it increase power on high rpm

[@25hpboatracerman]

Thank you so much Sir, I have seen how fast you are getting these 5hp to go, very impressive. I was going to do the exhaust but will get in trouble with the authority because of how loud it is. How fast are you guys getting your 5hp? Thanks so much Aussie Boat Guy 😎

[@damianpaul1959]

@@25hpboatracerman We can riched until 45mph,..we change the carb into another outboard motor carb,...we like to use 85 hp yamaha carb because it big enough to support the modified engine

[@Rlip]

There should be a national 5 hp race. How fun would that be 😂

[@25hpboatracerman]

Hi Champion, Absolutely 👍 would be so much fun and pretty safe too. cheers 🍻 Aussie Boat Guy 😎

[@Rlip]

Absolutely! Cheap too, what other mods do you have ?

[@jamesharris7310]

Where did you get the gear case from ?

[@25hpboatracerman]

Hi mate, I made it, I put up some videos on the channel on how I did it too, a few vids back. Cheers 🍻 Aussie Boat Guy 😎

[@darrenstewart4400]

You wouldn’t happen to have prop recommendation and supplier for a Yamaha 30HVH would you 👌👍🍺

[@25hpboatracerman]

Hi Mate, I all depends on the boat it’s on and the weight of the setup with people on board plus what you are wanting to achieve. Top speed with poor take off and hard to get on plane or a good all round prop or something with more thrust with a low top speed. Keep in mind the alloy props are pretty good all round performers for everyday use. Cheers 🍻 Aussie Boat Guy 😎

[@johnmann4214]

Where are you getting the racing props really want to have one on my Evinrude 15.

[@25hpboatracerman]

Hi mate, Only got one from a mate, very hard to come by for little motors

[@doradosurfcharters]

Cool video 👍And the gearbox leg type ?

[@25hpboatracerman]

@@doradosurfcharters It’s a modified standard gearcase. I will put up a video

[@Phantom-mk4kp]

Have you modified that motor in any way. Compression, porting? Edit. Should have waited till the end for the answer. What were the mods

[@AntiVaganza]

Go look at his other videos. Click the channel name, then videos, then they will line up chronologically.

[@rickym1146]

well i cant find an 8 spline chopper no where help me out its for a 15 horsepower yammy

[@25hpboatracerman]

Hi Mate, I mostly have to modify props and put my spline in to suit what motor I’m running. Try Ron Hill Propellers in the States, sometimes he has small props too. cheers 🍻 Aussie Boat Guy 😎

[@dimagen52]

Ты молодчага. Пойду своим покажу)

[@25hpboatracerman]

не уверен, что тгат означает

[@СергейЕ-к1н]

Приветствую, а вы не делаете ещё чпв винты?

[@СергейЕ-к1н]

Привет друг, сними обзор на этот гоночный винт, расскажи как его делал, многим будет интересно

[@thomaslindroos1667]

I'm really coming of as an asshole which I suppose I am but awesome video and crazy speeds for such a little boat

[@25hpboatracerman]

Good man 👌👌👌 Not an asshole at all, possibly just get a bit over focused on petty stuff, I am capable of doing the same. Cheers 🍻 Aussie boat Guy 😎

[@ericderace]

That's pretty fast! I had a brand new 20HP Suzuki on a 14' aluminum and was getting 38kph. Originally around 42kph but then I dented the boat. Perhaps if you tuned the hull, made sure it's flat, you could get some more top speed?

[@25hpboatracerman]

Hi mate, yeah hull shape is so important. I checked the hull and it is perfect after sone straitening. Cheers Aussie Boat Guy 😎

[@thomaslindroos1667]

I'm on a rage train today about units and nothing makes me angrier than kph. Wtf is kph? Its kmph or km/h the unit is km for kilometer.

[@25hpboatracerman]

@@thomaslindroos1667 Dude, please google kph and mph 🤷‍♂️🤷‍♂️ Why are you upsetting yourself, there is bigger things to be upset about. I do hope you find some enjoyment from these videos. Cheers 🍻 Aussie Boat Guy 😎

[@gabenieto3113]

How many ft it that tinny

[@25hpboatracerman]

Hi mate 👋 Think it’s about 8.5ft There is a build video on the channel. Cheers 🍻 Aussie Boat Guy 😎

[@XSAILOR65]

Great content as usual! Saved watching this with a few cold ones :) Wonder how much a setback, lets say 10 cm would help further? From where did you get the racing prop, newer found one for this engine? Incredibly result, insane speed!

[@25hpboatracerman]

Hi mate and thanks 😊 I do think a setback would help (it moves weight aft) The racing prop is from a racing friend (it’s off a bathtub race boat from the 80s) Cheers 🍻 Aussie Boat Guy 😎

[@pj-tv2890]

Can I ask for your size?

[@25hpboatracerman]

Hi 👋 I am about 80kgs and the boat is 36kgs motor 20kgs and had about 17kgs on board including fuel. Cheers 🍻 Aussie boat Guy 😎

[@pj-tv2890]

Nice thanks

[@K1VV1939]

Why don't you shorten the drive shaft to lower the motor down but keep the prop high. It looks like you could afford to lose 200mm

[@25hpboatracerman]

Hi mate, Yeah, it’s a good point and I thought about that but the swivel bracket is the problem with shortening a short shaft, I would basically be cutting the whole section out that mounts to the clamp bracket - swivel bracket. cheers 🍻 Aussie Boat Guy 😎

[@Diesr]

Put an injector at the intake port and remove the carburetor lol 😂

[@Diesr]

Then it will breathe

[@25hpboatracerman]

That’s a good idea mate 👍 Cheers Aussie Boat Guy 😎

[@davidheitman7004]

you need a bigger prop! rpm is to high. and weld a pad on the bottom of the boat!

[@25hpboatracerman]

Hi champion, Yeah a pad wound help for sure 👌 I am actually really happy with the revs and it’s right in the range I was after, I built the block and did port timing to suit around 7500rpm. The stock prop was a 8p and the little chopper is a 12. The little motor doesn’t have a heap of torque so a bigger pitch just kills it trying to get up on the plane from stopped. I reckon there is more revs in it but not without an external pipe. My modified 30hp yam 3 cyl likes about 8500rpm, and of course you would not run a stock block at those rpm and also you cannot expect the same life span either. Cheers 🍻 Aussie Boat Guy 😎

[@thomaslindroos1667]

Jesus Christ man knots, knots!

[@25hpboatracerman]

😂😂 Mate, here in Australia with the small boats, we use kilometers per hour. Race boats here under 50hp we use kp/h. I covert to miles per hour for my friends in the states. You can covert to Knots yourself very easily if your interested, 1 knot is 1.82kph. I feel a bit sad that is what you got out of the video 🤷‍♂️ it’s supposed to be a bit of fun. Anyway, all the best. Aussie Boat Guy 😎

[@thomaslindroos1667]

@@25hpboatracerman No the video was awesome and interesting. Im a unit nazi I know km/h* however when in the air or at sea the most used standard is knots as far as I know. Keep the vids coming they are very entertaining! I'm porting my first outboard, a 40hp yamaha. I will be overjoyed if I ever see knots in your videos :D

[@25hpboatracerman]

@@thomaslindroos1667 Might sneak one in there for you mate 😁 Out of interest please look up kph and mph, as far as I can research it is an acceptable abbreviation. Cheers Aussie Boat Guy 😎 Ps: good luck with your mods mate 👌👌

[@gazza2006au]

Be good to see fuel figure's per km for shit's and giggles lol

[@25hpboatracerman]

Hi mate, It surprised me how efficient it is. I did near 20km (my place to my parents and back) and it ran out of fuel (2.5 liters) about 500m from getting home. Cheers 🍻 Aussie Boat Guy 😎

[@petercrawford2597]

So basically Reducing drag..

[@25hpboatracerman]

Absolutely 👌👌☝️ You got it Cheers 🍻 Aussie Boat Guy 😎

[@jesseblackwell5733]

That makes my 15hp honda look like a seagull

[@25hpboatracerman]

😂😂😂 Yeah, it’s pretty funny, makes a lot of 15hp motors look a bit slow. It has had a lot of work done to the motor too though but probably only pushing about 7hp. Cheers 🍻 Aussie Boat Guy 😎

[@jesseblackwell5733]

@@25hpboatracerman unreal

[@matthoskin3572]

40km's on a 5 HP - WTAF?!!!

[@Diesr]

Nuts that’s the same block as a 5hp 2 stroke merc but ported and modded to shit 😂

[@25hpboatracerman]

True 👍 Love that little thing now. Cheers 🍻 Aussie Boat Guy 😎