Another member has informed me of what oil to use (Mobil 1 10-40), the appropriate oil filter wrench (0420-0577) and the oil filter (Onan 122-0836, NAPA 7398, WIX 57398).
onan marquis 5500 generator
Part Number is 122-0810 per owners handbook.
7.5 MDJE-3CR2268/AD Onan diesel generator
As for as I know Onan never published that information. If it is a non Onan engine. You will have to check with the engine manufacturer.
form_title= Onan Generator Parts form_header= Keep your generation running with new parts? What is the model number of your generator?*= _ [50] What parts do you need?*= _ [50] Is your generator still under warranty?*= () Yes () No
What is the fram oil filter cross reference for onan oil filter 1220893
form_title= Onan Portable Generators form_header= Stay warm with a portable generator. Do you currently own a portable generator?*= () Yes () No How often does your power go out?*= _ [50] What volume do you need on the generator?*= _ [50]
Depends on what Onan you have. Most RV units don't have alternators like a car. They charge through the control system. Off of the main AC generator section.
What is the reported manufacturers weight of the ONAN 250 HD GEN SET electrical generator?
Many ONAN Generator Engines.
This question has already been answered.
One can purchase an Onan Generator online from 'Electric Generators Direct'. Some models can also be purchased on Amazon and there are many listed on eBay both used and new.