Hey folks. Here is one for the experts.
I have a 2005 vintage Kohler 7.3 generator. Its a well maintained unit, new impellers every year, new carb 2 seasons ago. Heat exchanger boiled out with new carb installation. It was running great until.... it stopped running great.
The issue that I have is when at the dock or idling about she runs great. With a full load, its smooth sailing. Sometimes 'searches' a bit if the compressor on one of the a/c units turns off, but that seems par for the course.
The issue happens when I bring the boat to cruising speed. Running at 3400 rpm, doing around 17 knots, the unit decides to shut down. When this happens, I try to restart right away and it doesn't wanna cooperate. I'll go to the boat the following day, start it up and she'll run for hours.... at the dock.
The generator feeds off of the port gas tank which also supplies the port engine. I was thinking fuel pump, but a mechanic friend suggested that if it is a fuel pump issue, it would also have problems at the dock.
Any thoughts of solving this puzzle?
Thanks.