2004 mecury 115hp saltwater engine fly not turning all the way

Cthacke

Recruit
Joined
May 15, 2022
Messages
1
Hey guys im new here but really need help! So i replaced my water pump on my motor the other day and everything went back together nice an easy as it always has. I then went to start it back up and the flywheel would turn 3/4 of a turn and stop. I pulled the plugs and dropped the LU back down and could turn the flywheel by hand but it was the same issue. I then stuck a screw driver in the spark plug holes and all the pistons seem to be moving. Now im lost and dont know where to go from here i cant tell if the engine is locked up, or if the flywheel is stuck any help would be great thanks!
 

Chris1956

Supreme Mariner
Joined
Mar 25, 2004
Messages
28,525
If the flywheel will not turn, with the spark plugs removed and the gearcase removed, you have serious engine issues. If it is not something obvious like something jamming the flywheel, it is likely a connecting rod has broken or disassembled itself.
 
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