Yamaha 40ELJ 86' problem

[Curapa]

This is the engine that is on my buddies 84' Bass Tracker and it has a couple of problems.

For the past few years the engine has had a squeak or chirp noise at various times while underway. Sometimes it will occur when idling, sometimes when at half or full throttle. It is usually inconsistent but it has gotten worse over time.

We have been told that there is a bearing or seal under the power-head that is probably making this happen. Any ideas as to what this is?

On our last outing the engine began to bog. We limped back to the ramp and found that there was water in the cylinders. The water was removed, put on the muffs and ran again with the same results. Could these two issues be related? I am thinking they are not, maybe a head issue?

Sorry for the lack of detail but this is not my motor. Just trying to help.

Thanks,
Curt

[bradford]

Could it be a lean condition "sneeze"?

[Curapa]

No, it's definitely an issue with a worn part or such. It almost sounds like a turkey chirping.

[THEFERMANATOR]

YAMAHA's are known for having the bushing chirp in the upper riveshaft area on 4 strokes, but I've never heard of it on 2 strokes. As for the water, sounds like the headgasket may be done for. Has it ever been run hot?

[Curapa]

Originally Posted by THEFERMANATOR

YAMAHA's are known for having the bushing chirp in the upper riveshaft area on 4 strokes, but I've never heard of it on 2 strokes. As for the water, sounds like the headgasket may be done for. Has it ever been run hot?

Not that I know of. The overheat alarm works and it went off several months ago from the water pump being clogged but we have not had a problem until now.

We can pull the head and check it out.

[Destroyer]

Water in the cylinders is an almost sure sign that the head gasket went south. The only other way would be for there to be a crack in the block.