1977 120/140 MerCruiser Upper/Lower Unit Parts Needed...

gspig

Chief Petty Officer
Joined
Jul 7, 2004
Messages
409
Re: 1977 120/140 MerCruiser Upper/Lower Unit Parts Needed...

If you can feel a hesitation, you may have a chipped tooth on one of the gears. Best scenario is some dirt in a bearing, but the bearing will be damaged.
 

JFLS40

Seaman Apprentice
Joined
Jun 29, 2004
Messages
39
Re: 1977 120/140 MerCruiser Upper/Lower Unit Parts Needed...

I have a hunch buying used parts to fix this will cost more than the boat is worth.
 

JFLS40

Seaman Apprentice
Joined
Jun 29, 2004
Messages
39
Re: 1977 120/140 MerCruiser Upper/Lower Unit Parts Needed...

Took drive shaft housing cover off, found water which I know isn't supposed to be in there and a piece of metal between two teeth on the tapered gear on the shaft that comes from the engine. How do I turn the shaft around so I can inspect the rest of it? I have the shifter in forward gear, it clicks when I rotate the prop.
 
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