Home › Forum › Ask A Member › Gear lash, odd sound in Sea King 15 › Re: Gear lash, odd sound in Sea King 15
Lots of places rattles develop on these motors. The cover latch roller on the hood gets worn and the gasket in the lower pan relaxes it’s seal. These things can make the cover rattle or buzz. The grab handle in the back of the cover can get loose. The rewind can make all sorts of strange noises. Those are a few things to check if you aren’t sure where the sound is coming from.
I’m working on a 1958 Johnson FD 18hp now. When I service that water pump I’ll make a short video and demonstrate the gear meshing sound and feel so at least you have something to go by. I’ll PM you the video link.
As for the overheat condition, I read that thread also. Certainly try Ben Dittmar’s method since it can’t hurt and often works. Replacing a grooved wear plate is a big help also. Sealant between the plate and the gearcase helps, but I have not always used it and still had good cooling. Sometimes exhaust pressure does have ill effects on water flow at higher speeds tough.
Here is a link to Ben Dittmar’s video.
The biggest difference between the Chrysler water pump and the OMC is the wear plate. The OMC wear plate is slightly crowned or raised in the center so it’s best to replace the worn plate instead of honing it flat as Ben did the Chrysler plate in his video. Hope his helps. I should have a video on the 18hp OMC gearcase this weekend sometime and I’ll send you the link.
-Ben
OldJohnnyRude on YouTube