Questions & Answers for: onan 4000

Onan 4000 RV Generator - where is the oil drain plug? Where is the plug to drain the oil on an Onan 4000 Generator? My manual just has an arrow pointing to the bottom, but there is no access. I think ...

...Onan 4000 generator Just bought TOY HAULER with ONAN 4000 generator and was wondering what type of oil it takes? Also, can we go synthetic. SAE 15W-40 is what i used to use synthetic? not sure about ...

what is the oil filter for onan4000 generator yes--- where is the oil filter on a onan 4000 in toy hauler?

RV Onan 4000 runs fine but not putting out enough voltage to run anything Not sure how to set it up but you can take it and have the voltage turned up on your generator or the voltage regulator is out

...Onan 4000 generators. Be sure to ensure the fuel pump is pumping fuel to the carb by pulling the hose off the carb and watching for adequate flow. A faulty electric fuel pump can often only show ...

Onan 4000 will not start. Removed spark plug, it is oily and smells old. If this is a two cycle rebuild and clean carb. If this is a four cycle your rings are going bad, the smell would mean trouble.

...a Onan 4000 that turns over, but is not firing. I've replaced the coil, condensor, ignition controller, new spark plugs, new spark plug wires, any ideas Please check and fix the fuel line for clog

onan 4000 microquiet generator carb cleaned and wire ends cleaned Check the ignition circuit, and trigger coil for correct resistance on the trigger coil, and the ignition coil. The trigger coil is a ...

Onan 4000 won't turn over check for bad battery, loose terminals ,dirty terminals , faulty starter relay if it is not starting check for oil level is correct ( low oil level sensor turns off ), diesel

4000 Onan manual says as follows. TABLE 1-1. OIL VISCOSITY VS. TEMPERATURE EXPECTED AMBIENT TEMPERATURES SAE VISCOSITY GRADE 32° and higher 30 10° to 100° 15W-40 0° to 80° 10W-30 or 10W-40 ?20° to 50°