1998 merc 175 efi problems???

jsut wondering if anyone has heard of any crank/rod/piston ploblems on 2.5L merc 175 efi late 90’s… tuesday morning she let go. heading back to the boat launch at half throttle it started to knock then she died….. the motor seems to rotate in both directions almost one full revolution then stops. cant see anything in top of the pistons and they all move, just seems like something is interfering somewhere…..

im going to pull the heads and intake tonight to investigate and am planning on ordering a power head but just wondering if anyone has heard of a similar problem?

not on that motor but others a part of piston ring or other
inside part gets stuck in the exhaust port.
sorry. good luck.

Known for crank breaking. Had it happen to me a couple of years out of warranty, and the dealer was able to have mercury take care of it.

thanks for the replies…… pulled the right cyl head and found a plastic material with chunks of metal in it, looks like needle bearing kindof… going to order a new power head this morning.. talked to a rebuilder and they said that there is a plastic “oiler” on the crank that fails so……