What steps should be taken before starting an Onan that has sat for several years?
For an Onan that has set for several years w/o operation, I would do the following after changing the Oil, Oil Filter & Air Filter: NOTE: DISABLE ONAN POWER FROM ENTERING THE COACH POWER SYSTEM UNTIL VOLTAGE IS SET AT PROPER LEVEL. 1) Remove the cover over the control board & spray all board & wire terminals with an Electrical Cleaner (2-26 at home center, electrical dept.). Spray all Onan wire terminals in sight. Wait for cleaner to work, about 1 hour (WD 40 can be used, but not as good. 2) Remove carburetor to Fuel pump hose. File off brass crimp sleeve & find barb fitting. Replace w/fuel hose (3/16″ I Think). 3) Remove Carburetor & clean (Existing gaskets should be OK to reuse). 4) Clean all Onan Battery cables, both ends. 5) Now that the cleaner has had time to work, it is time to evaluate if you fuel system is functional. Jumper board terminal 9 to 5 & you should hear fuel pump & see fuel coming from pump. Got to achieve this step before anything else (Need Fuel to function). 6) F
