offthefront

iTrader: (1)

Almost Same thing happened to me today ..Picked up 89 311 thursday in Atlanta and pulled it back to Jax .. Today was to be first time in the water ...started Motors in Driveway just to make sure things were ok and Sure enough Port Motor got hot .....shut it down and Found the clamps had not been reinstalled on suction side of Sea Pump ..they were just loose .slid back on the hose ..Called Previous owners Mechanic and he seemd to think everything was ok ...So we but boat in water and it ran fine for about 25 mins ....then Port got hot ...limped back to port ...pulled seapump and it was toast.. replaced it ... now port motor runs rough ..wont idle ....I am sick .....

RMM

Thanks for all the input. He some further info. Went down again yesterday and and was able to get it running. Ran for about 5 minutes and kept checking on the temp of the risers by hand. Port riser started to get real hot so shut it down. Engine ran smooth. Now though I had a milkshake. Drained the oil and actually flushed about five gallons of new oil through the motor and when was coming back out clean I refilled it and that is how it sits. Pulled the plugs again and now no water in cylinders, plugs were dry and smekked like gas, but now water is in oil.

The starboard riser never got too hot to the touch, so think water is flowing through this side, but not through port side. Somewhere it is going into oil. Also pulled the pump again and impeller still looked brand new. no chunks out or anything.

Where should I start? Any advice would be great.

mrv8outboard

do a compression test !!! this will give you an indication of your head gaskets and or cylinder condition. after that if the compression test was ok than replace your manifolds and risers. change the oil and filter until its clean. even if it is successful you have done internal damage.

if it fails the compression test you can do a leak down test to find were it is leaking the compression.