1995 Merc Lower Unit help

jfavorite

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Apr 1, 2010
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Lower unit appears to be slipping at idle speed and during acceleration until boat is on plane. Prop hub replaced still doing same thing, lower unit oil looked fine, and very little for metal shavings on the lower drain plug. It is very difficult to turn the prop by hand when in gear and sounds like rubber rubbing together. Any help would be fantastic. Motor is 2.5L EFI.:
 

Bondo

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Apr 17, 2002
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Re: 1995 Merc Lower Unit help

It is very difficult to turn the prop by hand when in gear and sounds like rubber rubbing together.

Ayuh,... Is the motor turning over as you do this,..??
If Not,... I'd guess the crankshaft splines are Stripped...

The rubber noise is the waterpump impeller...
 

jfavorite

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Apr 1, 2010
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Re: 1995 Merc Lower Unit help

How can I tell if it is turning over, as it is turning it is difficult then the resistance decreases and it cycles that way as if the pistons are moving up and down if that is what you mean.
 
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