1996 Force 90 HP overheated

[Jupe209]

I own a 1996 Force 90 hp 2 stroke. I was at cruising speed last weekend and the engine just died. I had been running it all day with no incident. Fuel is mixed properly. I removed the foot and found that the impeller insert (which is plastic) is cracked. Alarm never went off or I would have shut it down. Engine will still turn over, but not as fast as before. Thought about putting some mystery oil in each cylinder and giving it a shot before the inevitable. Thoughts?

 

[Jiggz]

The proper way to diagnose this is to open and inspect the cylinders by removing the head. Depending on how bad the damage is, you can actually replace broken pistons/rings assuming you have the desire and a little mechanical skill to do it. I could have recommended doing a compression check first, but the fact you said it overheated and drags when cranking over, is almost a guaranteed indication a ring or two is broken.

Try to save the head gasket also for proper post analysis.

 

[jerryjerry05]

Do the comp test first.
​Then look inside the plug hole and see if there is any obvious damage.
Then pull the head if you see any problems.

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