Evanrude overheat know what to do when it happens?

[jserb]

long story short,kinda, i DONT have a over heat warning on my boat for my engin, the other night we went for a ride and my outboard overheated. We were just going about 10 miles an hour and i went to give it more gas and i got no power out of the engin, so thats when i took a look back to see if i could see anything and sure enough it was smoking/steaming out of the hood. pulled the hood/cover off and steam was all over, this thing was HOT my spit would sizzil off it. like i said we were barly above idel but i DO NOT KNOW HOW LONG IT WAS OVERHEATING WE WERE CURISEING FOR ABOUT AN HOUR. now, the next day, i try to turn it over and it sturggles to turn over. sounds like the battery is low but its at a full charge and the engin just barly turns over. Im here to ask anyone that has had a small or large problem with overheating if they know what could be going on and or what to do now. its a 1980 235 evanrude outboard. PLEASE HELKP!

 

[imported_lorin]

Re: Evanrude overheat know what to do when it happens?

If you know you're starting system is in good shape and it cranks very slowly I would do this:
1. Prepare to get bummed out.
2. Remove cylinder heads to inspect cylinders.
3. If cylinders look ok and it still cranks slow with heads off start thinking about a toasted bearing.

 

[Solittle]

Re: Evanrude overheat know what to do when it happens?

Just a thought - Before you pull the heads take the plugs out, tilt the engine up and put a couple of tablespoons of Marvel Mystery Oil in each cyl. Let set overnight an then try to turn ot over by turning the flywheel by hand. That may get some oil where it needs to go and free it up.

My guess is that this will not solve the problem but it is worth a try. If it frees up do a compression check. If not follow lorin's advice.

Speaking of check - you may end up having to write a big one.

 

[R.Johnson]

Re: Evanrude overheat know what to do when it happens?

In a case like this, I would pull the head "heads" and check the cylinder walls for scoring, and aluminum deposits. What size, and year engine are we talking about?