WHAT IS ERROR/FAULT CODE 37 ON A ONAN 5500 MARQUE GOLD GENERATOR ?

have the carby overhauled
water or junk in the main jet

what model is it KY KV need that and Spec. If it blinks 3 times it indicates a lower service fault. While blinking hit the stop button 3 times fast, then read the code. It will blink, pause then blink again and repeat. What is that code and I can help you. IE 4 blinks pause and 3 indicates code 43

Try under the bench seats around the table, near the heater.

Does it bog down? if so have engine checked for ability to deliver HP. Cylinder compression, leakdown test. When was it tuned?

Check fuel pump pressure, how long has it sat. What load is on after it stops?

Code 32 is a low cranking speed sense. You didn't mention a Spec # which would help. You say batteries are ok, but the generator is not getting enough cranking amps or voltage to maintain the control properly. Check, battery voltage, wiring, any in line isolation solenoids, check generator solenoid, also make sure there is no mechanical binding on the generator, a good way to do that is remove the spark plugs DISCONNECT THE BATTERY to prevent starting, underneath where the air intake is under the alternator is a plastic plug, remove that and you can put a socket I believe 3/4" up onto the alternator shaft and rotate the engine, if it tuns freely there is no binding, if you feel it is hard to move, check the drive train, belts, pulleys underneath (A lot of work, best to take to a dealer if it is mechanically bound)

Had a similar problem. I realized that the fuel was not metering properly, in other words, it was running out of fuel so I assumed that either the jet in the carb or one of the metering passages was clogged. I took the carb apart and cleaned the heck out of it, running cleaning fluid and using small wires to clean out passages and put it back in and it worked fine. It is also important to have a good filter on the fuel line going to the carb. I relied on the one that is in the fuel tank for a while and realized that it deteriorated until it was not filtering well. I put an inline filter on the fuel line between the fuel tank and the carb. Hope this helps.

Usually what that means is that the genset Configuration is not set correctly you will need to bring it to a factory authorized service center for them to correct this.

Sorry to read about your problem, I hope this helps you out.

no fuel pump gravity fed

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it sounds like a short on that breaker