Engine is a Mercruiser Mag 350 Ski MPI with 300 hours since new connected to a v drive in a Tige ski boat. Engine is down on power & idles poorly. Installed a new set of plugs and carried out a compression check. Number 2, 3 & 5 cylinders only show 50 psi all the rest are at 170 psi. Squirted...
A customer asked me why the Mercruiser Alpha One outdrive on his ski boat was leaking oil badly from the universal joint bellows. He was getting through a quart of gear oil a day when using the boat! I found a split in the bellows where the gear oil was coming out (and water getting in)...
