Top 20 Onan Marquis Gold Quiet Gas Generator 5500 Watt by Cummins Onan Questions & Answers

replace the dead battery

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

Did you get this fixed? this is an old post. If not visit www,advanced-power-technologies.com (Cert Cummins Dealers) They can answer your questions.

Is this gasoline or propane fueled?

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?

sounds like u need a new fuel pump when u first start up fuel has seaped back to tank only when u crank it brings fuel back up then the speed keeps fuel ok , replce fuel pump shud b ok then.

What is the question? You want a free service manual?

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)

You may have dirty rotor slip rings, or bad brushes. Field voltage must be maintained. Check those first

Again, what generator model? Onan have thousands. Be more specific please.

What model? Please be more specific.

Contact www.advanced-power-technologies (Cummins Dealer) with exact model and spec number. Also there are cold weather options, and cold weather models. Many people buy the RS units of the net, only to find they have been stuck with warm weather models, and they don't start. Does it show a code, or a code 45.

Which motor, which generator model and Spec

Did you get this fixed? this is an old post. If not visit www,advanced-power-technologies.com (Cert Cummins Dealers) They can answer your questions.

Some Onan 4KW do not have auxiliary battery charge windings and rectifier. Are you sure you have one? If not you will need and external charger

Model spec number? be more specific please

It is a screen on the muffler output, also remove the plug on the bottom of the muffler to remove carbon

https://cleanestor.com/how-to-clean-up-freon/?expand_article=1 This should help

No one gives sizing. https://generatorguru.com/spark-plug-27901063/ https://www.google.com/search?q=united+power+generator+Model+GG2900+parts ..