75 MERCURY FLYWHEEL LOCKED

kelman

Recruit
Joined
May 9, 2005
Messages
5
This is a 75hp mercury 1996 model. THe boat ran great on the muffs before taking to river. I had the water pump replaced a couple of days ago. When the boat was put into water i cranked it and it ran fine. Water pressure seemed okay. After running at full throtle about 5200 rpms the moter suddenly died and would not crank the starter will engage but flywheel is locked. THe forward and reverse gears are there but in forward the prop will spin and make a clicking sound in reverse no movement is allowed. Any help would be great just wondering if this motor sounds salvageable.
 

WillyBWright

Fleet Admiral
Joined
Dec 29, 2003
Messages
8,200
Re: 75 MERCURY FLYWHEEL LOCKED

It could be the motor or gearcase. You won't be able to tell by spinning the prop. Remove the gearcase and see if the flywheel turns then. You might also check your gearlube. Chunks of metal in the lube wouldn't be a good sign. A bit of metallic isn't unusual.
 

Ben Konopacky

Petty Officer 1st Class
Joined
Apr 5, 2004
Messages
296
Re: 75 MERCURY FLYWHEEL LOCKED

K ;can the eng.be turned over with a pull cord ?<br />if it could be turned over then you might have a low voltage prob. or loose batt. connection .
 

kelman

Recruit
Joined
May 9, 2005
Messages
5
Re: 75 MERCURY FLYWHEEL LOCKED

no the pull cord cannot turn the flywheel nor can my arm. Tryed that but no luck. If i take the lower unit off and the flywheel turns that will definately tell me if it is in the motor or gears correct?
 

WillyBWright

Fleet Admiral
Joined
Dec 29, 2003
Messages
8,200
Re: 75 MERCURY FLYWHEEL LOCKED

Pretty much. Could be both, but nobody's that unlucky.
 
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