1985 Force 125 -- Hiss/Honk , Compression

[paul21]

I've got a 1985 Force 125hp outboard. I was doing a compression check today and I noticed when I hand rotate the flywheel with all the plugs out, there is a hissing sound at a certain point coming from the bottom carburetor. If I rotate it faster, it will make a honking noise as well. I assume this is from the reeds. Are they worn if this is happening? It only happens once per full rotation.

My compression is (PSI)
1-132
2-131
3-130
4-130

 

[Newbie@boats]

Re: 1985 Force 125 -- Hiss/Honk , Compression

The compression sounds good, the hising is the air I believe mine makes the same noise....the honking not to sure about.

 

[Frank Acampora]

Re: 1985 Force 125 -- Hiss/Honk , Compression

because the reeds can stand open up to .010 inches, the "honking" is compressed air blowing past and vibrating the reed petals--just like a saxophone or clarinet. It is normal. A really good engine can play Beethoven.