I've got a vessel with a 60hp Isuzu QD C270 in it. While sailing around today, some of the times she was under auxiliary power I noticed that she would slowly reduce speed, and I would have to give it more fuel
- although so far as I know my throttle has always held true. While tearing down and getting ready to come back into my slip, we were rolling around in gear at an idle. Suddenly, she stopped running. Just out of the blue, as if someone had pulled the kill switch. Only, after that, she wont turn over. And I was terribly close to the marina across the lake from me. Thank god my neighbor was around and managed to tow me back into my slip before I drifted into the marina or had to deploy my anchor
(which, coincidentally, has a hydraulic windlass
powered by - you guessed it - the motor).
After sitting in the slip for a while, praying I had just managed to run her battery banks dry and that I had put my alternator to work enough to kill the motor, I decided to try and start her up since the voltage meter seemed healthy. Except now, she doesn't turn over. Not in the least, even marked the belt wheel on my water pump
it's hasn't moved but about 3° in several attempts to turn her over.
Tried to grab a hold of it with a pipe wrench and turn it, but it wont budge. She had about 4.25 quarts of oil in it, which is about .25 more than it needs. She was running at about 175°F, had about 55 PSI of oil pressure when I had checked about 10 minutes before that. I'm quite doubtful that it would seize under those conditions, but what could it be? Has anyone had anything like this happen to one of these motors?