How to Unseize a 2 Stroke Outboard Engine

How to Unseize a 2 Stroke Outboard Engine
If you're unlucky enough to get your 2-stroke outboard engine seized, perhaps these steps will get that motor churning over again as it did for me.
Adventure Primal. Helping to improve your boating adventures.

[@michaelg8359]

Thanks, mine did the same after 2 weeks. No idea why. I did the same and so far so good!! Thanks for this post!!

[@garykuiper6030]

Your Lucky Mate. When mine acted the same. But....When I got mine broke loose I had all kinds of Chips from my Stator, which I am waiting for a New Stator! Good luck.

[@aidenravell7099]

Very helpful video really needed it🙌🎣

[@AdventurePrimal]

no problem. thanks for watching and commenting.

[@rangerbandit911]

Well done sir. Working on one myself.

[@AdventurePrimal]

Well i hope this video helped you out.

[@vancott7399]

Thanks !

[@jean-sebastianroy2210]

Thanks man!

[@sailingyemaya9781]

This happened on my Evinrude 15h. Ran when parked

[@fatcatclark8428]

get the plugs out and pour marvel mystery oil in. also re tork the head bolts. fixed my 25 evinrude.

[@jasonbarnes7908]

Thank you for your Video, it was very helpful. i used Marvel Miracle Oil on my 6.6 Johnson Seahorse and now its not seized and i have compression

[@AdventurePrimal]

thanks for watching and commenting. Its good to hear when a video helps someone out. Its also good to hear youve got yours going.

[@riverrivers250]

I hope this saves my motor… lol i got stranded this morning… just quit on me while i was driving. Over heated. Didnt realize the water sucking thing was clogged abit

[@AdventurePrimal]

Yeh. Im not sure on that one. Mine was due to a head gasket issue letting water into the piston chamber. Once i changed that, then it was all good again. Over-heating may have caused the head to warp and other issues, which will need a different fix.

[@riverrivers250]

@@AdventurePrimal ya most likely just gonna buy a new one. Atleast a 20hp….. that 1994 mercury 25 did me good for many years… haha

[@AdventurePrimal]

@@riverrivers250 that's not bad. I nice new 4 stroke doesn't hurt to have. I bought a new Suzuki 15hp for my boat but I still have the Tohatsu 12 (1986 model) that I have in the video. Its still going well.

[@svenn1445]

How do you keep the outboard from spinning around when you are putting torque on the flywheel?

[@AdventurePrimal]

I left the motor on the boat and let the boat stop it from turning further.

[@mikee.1070]

Isn't that nut pressing the flywheel down? In my outboard it actually was loose when I got it loose and i could take the nut off with not so much force. I'm not really sure how working on that nut can get the motor unseized?

[@darrynbowden3290]

Hi Mike. The nut on my flywheel is tight. That allowed me to use the nut to gently move the piston to start the freeing up process. You need something to move that piston. I think you can still use your nut to do that job. You'll ned to check if your nut is meant to be loose but it doesn't sound right to me.

[@jrbuch]

Late reply. I let mine sit, and leave fuel in the chamber. That said, I like to get out every three weeks or so. Where not possible, i'll throw the muffs on and start it for 15 minutes or so then shut it down and leave it until it's time to use it again.

[@AdventurePrimal]

I use to leave fuel in it as well but times between use did vary. Your idea of running it every few weeks is good. Thanks for sharing.

[@seriksson9721]

Tohatsu/Nissan is good engines.

[@whitiedave]

Thanks man.... :)

[@AdventurePrimal]

I eventually worked out that the head gasket was leaking water into the chamber and that was the reason that it was seizing. Now that Ive fixed that, ive had no more seizing issues.

[@whatsupshittafabraans1926]

You looked at the spark plugs and there was plenty of oil in there! Great comment

[@waynewolfe8817]

I always run it out, and when I store I pull the engine over several times to blow out any water left in the cooling system.

[@AdventurePrimal]

Thanks for that tip. Thats a good idea

[@DekodaHusky-cm4gv]

Don't run it dry ever it drys the rings and they will brake

[@utalkie3]

On step 2 what are the other issues?

[@AdventurePrimal]

a blocked exhaust port. Nothing can get out until you provide an opening by removing the spark plug.

[@ellishendricks9206]

How about trim not moving up or down

[@AdventurePrimal]

is that trim for tilting the motor? if so, thats not related to this and I havent looked into that as yet. This motor did not have a motorised trim, only manual settings.

[@bobwest9577]

Yeah that's fine. but beware. you WILL need a new impeller after tthat, that's the water pump, but if it's new you'll be okay. P.S. I should explain. you never turn a flywheel backwards, the blades on the pump take shape on going one way, they will crack off going back the other way.

[@AdventurePrimal]

Excellent. Thanks for that Bob. That's what i like to see here, good tips to help others out. Thanks for the helpful comment.

[@michaeljentsch9320]

Hi Bob. Absoluletly a 2 stroke enging can be turned counter clockwise. Especially in this circumstance. Just turning one way would put unnecessary force on the rings and potentially cause damage to them or the cylinder bore. There are other implications for some 4 stroke engines that mean they shouldn't but a 2 stroke is just fine. Impellers are made of nitrile rubber. You can install them any way you like, though the correct way to do it would be to have the fins/blades sweeping back from the direction of travel however they will correct themselves without issue once the drive shaft starts turning. The only issue that may arise with cracking/breaking off is when the impeller is old. It SHOULD have a new impeller each year or so regardless of usage as preventative maintenance and I agree that this one should probably be changed for that reason but it doesn't necessarily NEED to be replaced. Part of the reason for changing the impeller each year or so, or after a certain number of hours use is to inspect the rest of the pump for wear. The housing and wear plate which the impeller sits in and on can wear away if there has been sand or debris caught in the impeller housing or where it usually accumulates under the blades between the impeller and wear plate causing gouging.

[@tastycake1969]

hahaha. Bob, the engine is seized! You are a genius pointing out that you need a new impeller. And FYI, rocking the flywheel back and forth is fine. Why? Because the engine is SEIZED and the impeller is the least of the problems. hahahhahaha

[@officialWWM]

I’m guessing it’s the lower crankcase seal.

[@AdventurePrimal]

I think it ended up being the head gasket

[@officialWWM]

@@AdventurePrimal ahh, yes. At least that’s an easy fix :)

[@seriksson9721]

Some more 2strokeoil in petrol now and in the future perhaps?

[@AdventurePrimal]

I dont think thats good. Staying with the correct ratio is best there.

[@seriksson9721]

@@AdventurePrimal Okay. I thought that a little too much oil is usually better than a little too little oil. It both lubricates and protects against rust. I mean that you can increase by 0.5%

[@gordonbarker5844]

Need to know where the water came from?

[@pyra6517]

Was thinking that too.

[@AdventurePrimal]

Yes id like to know too hey. I thought it the fuel but it doesnt look like it was. Maybe from washing the boat down?

[@davidlove7825]

@@AdventurePrimal head gasket.

[@AdventurePrimal]

@@davidlove7825 yes ill need to check that then. Ill give it another test run on the water and check it out. Thanks for the comment.

[@gordonbarker5844]

@@AdventurePrimal It has been known for water to find it's way through the exhaust if using a pressure cleaner.

[@wakeuppeoplewakethefup.4540]

Run it dry if possible. Fuel today sucks.

[@whatsupshittafabraans1926]

Sheep oil in near vertical, carby clean & fuel replace, just do it, rock the crankshaft back n forth , pull two wanks and she be running

[@whatsupshittafabraans1926]

Might need a new headache

[@whatsupshittafabraans1926]

Jeez your engine mounts are shot

[@rakituma]

Look ok to me. How did you arrive at that conclusion?