Setting the timing on mercury 90hp 2stroke

#howto #diy #fishing #beforeyougo #fixed #outboard #outdoors #restoration #mercury #easy #boat

[@TimsWorkshopTJY]

The correct timing makes a world of difference on these motors. Yep the upper screws are for the idle and WOT timing the lower two are for carb cam and roller adjustment and carb full open setting so the shutters don't become the stops. Congratulations on a successful video

[@donerightbydadproductions]

Thank you so much. I had a great time learning and sharing my experience.

[@vistkri]

I’m trying to convert my 75 hp into this 90. Gonna try this later today👌🏽 Great video!

[@johanbronkhorst946]

Thanks I reset all my settings on the motor start like a treat ❤ Your a champ

[@donerightbydadproductions]

Glad I could help you out. Hope it rains amazing for a long time for you.

[@lowellhalsteadjr4832]

This video is very helpful. Now im wondering about balancing the carburetors? Ive done orher engines with vacuum gauges.

[@donerightbydadproductions]

That would be some sweet tuning

[@Cacheola]

Pretty easy to make a manometer, they work excellent

[@needmoreboost6369]

I’ve had great results adding timing! Using 98octane and synthetic oil there’s a few hp to be had over factory! For customers that prefer cheap fuel I stick to factory settings

[@youtubecomments5951]

Cheap lol. We have max 94 and that’s rare. It’s max 93 and that’s $4.69 a gallon now.

[@Kyle-sr9zv]

Awesome video, hard to find helpful videos like this. I was curious since I don’t have a timing light if I could do adjust the timing screw while it’s running on water? Motor runs like a top but starts and idles very rough

[@donerightbydadproductions]

Yes, absolutely you could do it in the water by ear. But I would recommend maybe checking out your carburetters first or a week fuel delivery.

[@Kyle-sr9zv]

Thanks for the suggestion! This is my first boat, I’m having trouble finding a place to buy parts for my outboard. It’s a 89 mercury 115 two stroke. I’m not sure the model number or where to find it. Also do you have any idea where the fuel filter is on these outboards? I can’t see one​@@donerightbydadproductions

[@GraemeJones1979]

Hello mate going to be doing the same adjustment on my mariner 50hp. Just a quick one when you set your TDC to 0 then explained about setting idle to 4 degrees was that to the left or right hand side of TDC? I’m assuming to the left is BTDC and the right is ATDC

[@dumpsterfire6351]

FINALLY Someone showed me how. Thanks 🙏

[@donerightbydadproductions]

No problem buddy.

[@bibblybobs1]

Hey bud, great video. Are the plugs still installed or removed? Thanks

[@donerightbydadproductions]

I have switched plugs. Thanks. I’m glad you like the videos. I enjoy doing them.

[@geraldoakley7688]

HI good video, well explained, I have a 4 cylinder 115 HP 1989 mercury outboard 2x2 and I was going to check the timing, do you know if the settings are the same as your motor

[@donerightbydadproductions]

The timing will be completely different for that as well as how to do the timing you’re gonna have to time each bank separately I don’t have much knowledge of it but I will. I’m sure one day as I have a 115 Evinrude v4. Dig into it and let me know what you find. I’d be very interested to know.

[@spencerpreston6913]

Any chance you’d know of where to find a full wiring harness for this motor?

[@donerightbydadproductions]

Like from the dash back to motor?

[@richardmcdonald5683]

I have a 1999 mercury 40hp 2 stroke, will it be the same as this for me to set the timing. I cant seem to find anything on doing it.

[@Claas90056]

Bonjour Pouvez vous faire un schéma du comment vous avez câblé la lampe strombo !?😊 Merci!

[@esin741]

Hy bud...is the impeller getting affected on all those dry runs while you're doing the adjustments?

[@donerightbydadproductions]

Lol well ya. But it was done to begin with. I would not do this if I was trying to keep the integrity of the impeller

[@r.seaboats6666]

Will this work on a 94 Mariner/Mercury 100 two stroker?? Looks Exact same setup

[@donerightbydadproductions]

Sure will

[@quarlow1215]

Yeah adjustment bolt length is important..... once in awhile.

[@donerightbydadproductions]

From time to time. Ya.

[@kldodson]

Can you hammer the plug gaps closed and reinstall the plugs, and wouldn't that ground the plug out?

[@donerightbydadproductions]

Don’t do tgat

[@sr522re]

Are there any gains to be had by removing the cover in front of the carb intakes? Your cover seems to be missing.

[@donerightbydadproductions]

Nope it’s just off. This motor sat outside with no cover on anything for years. And the motor was able to turn over so I said I can bring this back to life and it had a good compression in each cylinder.

[@geraldoakley7688]

Would the 4 BTDC and 22 at WOT be the same on all 4 cylinder motors, I have a 1989 115 2x2

[@donerightbydadproductions]

No yours will be timed differently

[@joekatieuvalle5943]

Could an out of time motor cause the throttle timing rod to pop out of the plastic keepers?

[@donerightbydadproductions]

No I would say the clip is just old and worn out.

[@apachebill]

That’s a “known issue”. Mine popped out at about 18 years. Replaced it as it wouldn’t stay put. Last day on the water before changing it I brought it in to the dock held together with a bread wrapper twist tie. 😂

[@user-gq2vn1xj2r]

Does it hurt the water pump when you dry crank?

[@donerightbydadproductions]

Well excessively dry cranking. I’m sure it can’t be much help.

[@cyrille29200]

Bonsoir super beau travail cela vas me permettre de vérifier mon moteur ,j ai une question, POUR LE REGLAGE DE KA BIELLETTE D HUILE comment vérifier la quantités d huile qui doit couler pour 1litre d essence pars exemple ,et à combien de tours minutes faut il procéder c est réglage. Cordialement Bonne soirée

[@user-zo9fj7qs3h]

I have a 90 merc. That I'm having trouble getting the motor out of my 94 searay jet boat. I believe I have all the bolts out but I'm not sure, can you suggest anything?

[@donerightbydadproductions]

Outboard jet?

[@donerightbydadproductions]

If so, to separate the impeller from the shaft, you just get it hot with a torch and the nylon will melt, and that you will be able to get the night off

[@terjee648]

You have the timing light on cylinder on top wire ?

[@donerightbydadproductions]

Yes.

[@TheCahazuka]

Is it possible to have the timing simply go out when it is running? I am running an 87 mercury 80HP. It was running fine all spark plugs spark getting spark, the motor wont even start with carb cleaner.

[@donerightbydadproductions]

I would suggest pulling off your fly wheel and seeing if you’re shaft pin shaped off. The sheer pin.

[@TheCahazuka]

@@donerightbydadproductions you nailed it, I pulled the flywheel, found out the previous person that had the flywheel off stripped out the flywheel nut. The flywheel key is definitely the issue.

[@donerightbydadproductions]

Awesome glad I can help bud.

[@steventurner5260]

What year motor is this I have one looks the same that I was left with a boat that my pop left me when he passed and can't find any id tag anywhere any help would be greatly appreciated

[@donerightbydadproductions]

This is a 90’s. the tags rot off sometimes

[@steventurner5260]

Is there any other way to identify the engine

[@walkertonheights]

Do you know if 5K ohm spark plug caps are Ok?

[@donerightbydadproductions]

That should be sufficient

[@cheek567]

I have a 70 Mercury elpto 89 3cyl. The instructions show 0-4 advance and a max of 28. and where exactly should I adjust the ignition with the lamp?

[@donerightbydadproductions]

Upper arm there’s a screw there. Same kind of area as your throttle linkage but the higher one.

[@MrInsanityflea]

My motor splutters a bit when you put the hammer down, suspect it is timing, thank you to the video I understand it perfectly now, 200hp efi - idle timing is meant to be 0-9 ATDC (I'm guessing you set idle speed here hence the range) and max is 16 BTDC at cranking speed, 22 BTDC at WOT. - Will adjust this and see if it removes the spluttering response.

[@donerightbydadproductions]

That should do the trick.

[@grzegorzihma6746]

What do you have at voll throtle? We have v6 150 ps to do, and i cant find everyting

[@donerightbydadproductions]

Like for. Compression test ?

[@donerightbydadproductions]

For timing. A max of 26

[@user-vh6ix9vy9w]

I have a 96 mercury 115 and it runs fine until it's under a load then it won't even get on plane could it be the wot timing?

[@donerightbydadproductions]

I know it sounds weird. But next time you take it out. Try squeezing if your ball at the same time is wide-open, throttle see if it changes if it does it’s a fuelling issue not enough fuel flow.

[@user-fx7uy9ls5e]

Hi gyus i have a mergury 4cylinder. If my top piston is out the marks on the flywheel is on the other side of the timming window.could the flywheel key be broken?any advice plz.motor start quick.takes bit long to get on planespeed.

[@donerightbydadproductions]

Yes start with that key

[@donerightbydadproductions]

Also, what horsepower is the motor and what kind of prop is on the motor usually with most outboards it’s a you probably want a 17 pitch prop. If it takes a long time to get up and out of the water, usually it’s because you have the wrong prop. You probably have a 19 or bigger.

[@kevinhall5496]

My motor starts and idles but when I put into gear it dies instantly. Do you think it may be out of time or is there another issue it could be?

[@donerightbydadproductions]

I would check neutral safety switch

[@donerightbydadproductions]

Outboard or inboard

[@donerightbydadproductions]

If outboard then it’s the shifter interrupter switch, usually located right where your shift cables mount to your motor

[@kevinhall5496]

@@donerightbydadproductions when it’s out of the water and I have the muffs on it I can shift it just fine. Goes into gear and runs great. But in the water it dies out as soon as I go into gear

[@donerightbydadproductions]

@@kevinhall5496 this is going to be a weird question. But has The Boat ever been on the beach. I have seen blockages in the exhaust system where it will run when it’s out of the water but then won’t run once the exhaust can’t flow so freely. But still it doesn’t make sense to me. Sorry buddy I don’t really know what to tell you let me ask a few of my buddies and see what they got to say. They are old timers. They’ve seen it all.

[@Cacheola]

My book say max 26@5000k RPM, 28 @ cranking... at least on my ~87 90hp. Just doing it now, cheers

[@donerightbydadproductions]

26 should work perfectly for you.

[@birtanmihai7353]

I have a mariner 75 same problem i cant fix it 😢😢 , can you share a picture

[@donerightbydadproductions]

It’s either going to be your high windings in your stater or your switch box

[@BrianLoving-yj5vq]

just curios but why does all the wires have to be grounded??

[@donerightbydadproductions]

They’re not all grounded. They go to blocks it’s strange

[@larrybalowski946]

Did you not have water to test

[@donerightbydadproductions]

Pump was shot anyway and I know I didn’t run up enough to work the head gaskets so I wasn’t too concerned about it

[@mikejones3340]

I need help on my 94 90 hp mercury

[@donerightbydadproductions]

What’s the problem

[@infatuationsencumbering2251]

seems to me that the engine is backfiring

[@donerightbydadproductions]

Oh yes, I’ll kinds of issues at first

[@markdavis2090]

Man I sure would like to have this question answered. Please quickly.

[@donerightbydadproductions]

What answer I will answer it

[@donerightbydadproductions]

Sorry, my phone doesn’t seem to notify me when somebody leaves messages

[@marcrobert-vi2mj]

The switch box is bad.that motor is really prone to do that

[@donerightbydadproductions]

Add switch box and bad stater