tmal2
Member
- Feb 14, 2009
- 116
- Boat Info
- 1989 340EC
- Engines
- Twin 7.4L Mercruisers with Hurth transmissions
I've got a 7.5kw Quicksilver (Generac) genset in my boat that has run the gauntlet of driving me crazy to giving me a few years straight of trouble free service. Since I'm here posting, it's driving me crazy again.
I have had zero issues with this unit lately until last week when of course, I was away on vacation.
I woke up one morning and tried starting the generator and got nothing. It didn't even crank. upon inspection I found the circuit breaker next to the start/stop switch had popped. I pushed it back in hit the start button and she fired right up. I ran it for about 30-45 minutes then shut it down.
The following morning I went to start it again and it cranked, started and shut itself off after 2-3 seconds and continued to do the same thing.
I've had this issue before (ended up replacing control board) so I started doing some troubleshooting. I removed the #85 wire from the control board to rule out any sensor shutting it down and that made no difference.
My second thought was perhaps the overspeed shutdown adjustment had changed so I fiddled with that screw turning it from all the way counter clockwise to all the way clockwise but still had the issue. ( I know it needs to be reset again before using the unit)
At this point I was frustrated and just stuck with my portable Honda for the rest of the week.
Yesterday I tried again to figure out what's going on with no luck. I was able to keep the unit running by playing with the overspeed shutdown but not every time I cranked it. Just out of curiosity I looked at my electric panel and had no voltage showing with the generator switch set to on. Never had that happen before so I went back to shut the unit down using the start/stop switch on the motor and it would not turn off. The only way I could shut it down was by pulling the circuit breaker. Sometimes it would restart and other times it would run and shut down again.
The green light on the board is on while it's running but then goes out and the unit immediately shuts down. The red light never comes on and I'm really stumped by the lack of AC power output
I have a source for parts and don't mind buying what I have to but also want to avoid throwing costly parts at it without knowing exactly what the problem is.
Has anyone else had this problem or have any suggestions on where to start?
Thanks in advance.
I have had zero issues with this unit lately until last week when of course, I was away on vacation.
I woke up one morning and tried starting the generator and got nothing. It didn't even crank. upon inspection I found the circuit breaker next to the start/stop switch had popped. I pushed it back in hit the start button and she fired right up. I ran it for about 30-45 minutes then shut it down.
The following morning I went to start it again and it cranked, started and shut itself off after 2-3 seconds and continued to do the same thing.
I've had this issue before (ended up replacing control board) so I started doing some troubleshooting. I removed the #85 wire from the control board to rule out any sensor shutting it down and that made no difference.
My second thought was perhaps the overspeed shutdown adjustment had changed so I fiddled with that screw turning it from all the way counter clockwise to all the way clockwise but still had the issue. ( I know it needs to be reset again before using the unit)
At this point I was frustrated and just stuck with my portable Honda for the rest of the week.
Yesterday I tried again to figure out what's going on with no luck. I was able to keep the unit running by playing with the overspeed shutdown but not every time I cranked it. Just out of curiosity I looked at my electric panel and had no voltage showing with the generator switch set to on. Never had that happen before so I went back to shut the unit down using the start/stop switch on the motor and it would not turn off. The only way I could shut it down was by pulling the circuit breaker. Sometimes it would restart and other times it would run and shut down again.
The green light on the board is on while it's running but then goes out and the unit immediately shuts down. The red light never comes on and I'm really stumped by the lack of AC power output
I have a source for parts and don't mind buying what I have to but also want to avoid throwing costly parts at it without knowing exactly what the problem is.
Has anyone else had this problem or have any suggestions on where to start?
Thanks in advance.