Generator problem 7.5 onan
When I put full load on gen it cuts off and throws a 33 code. I checked coolant and air filter as per manual both ok . What could be the problem?
Forum Discussion
Well,
Yeah, you could say I "had" a handle on it. My 7.5QD had the same code back a while ago. Super long story short, I had to replace that coolant temp sensor. Lucky for me, the gen is on a slide out tray. That makes for seriously easier maintenance and repairs to be done. But, that sensor can be a real bear to get out or, it could simply unscrew, just like a spark plug which, it's about the same size as.
Just for info here, the cooling air is drawn in from underneath, in the center front. It's first job is to cool the major electronics that are mounted right up front. Then, it cools the rotor and stator. From there, it turns sideways, and cools the radiator.
From there, it's ducted through what's called the center bulkhead and into the area where it finally cools the exhaust and muffler.
It is then jettisoned out the bottom, towards the rear.
That sensor, if it's your problem, is located in a spot that you can easily see but, not actually get a great bite from a socket or a wrench. I have a whole series of pictures of my generator almost completely torn down, for replacement of that sensor and, the rotor which, had one of its magnets disintegrate and send magnetic shrapnel all over the inside. What a mess.
But, once that sensor was replaced, it's been acting fine.
Scott
Yeah, you could say I "had" a handle on it. My 7.5QD had the same code back a while ago. Super long story short, I had to replace that coolant temp sensor. Lucky for me, the gen is on a slide out tray. That makes for seriously easier maintenance and repairs to be done. But, that sensor can be a real bear to get out or, it could simply unscrew, just like a spark plug which, it's about the same size as.
Just for info here, the cooling air is drawn in from underneath, in the center front. It's first job is to cool the major electronics that are mounted right up front. Then, it cools the rotor and stator. From there, it turns sideways, and cools the radiator.
From there, it's ducted through what's called the center bulkhead and into the area where it finally cools the exhaust and muffler.
It is then jettisoned out the bottom, towards the rear.
That sensor, if it's your problem, is located in a spot that you can easily see but, not actually get a great bite from a socket or a wrench. I have a whole series of pictures of my generator almost completely torn down, for replacement of that sensor and, the rotor which, had one of its magnets disintegrate and send magnetic shrapnel all over the inside. What a mess.
But, once that sensor was replaced, it's been acting fine.
Scott
