onan generator fuel filter
- Thread starter clayh
- Start date
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Gary RV_Wizard
Site Team
Any aftermarket inline fuel filter, sized for the fuel line, should work fine. Your local auto parts store will have a selection.
blw2
Well-known member
mine has a filter right at the generator. An onan part that screws right into the fuel filter.
Gary RV_Wizard
Site Team
A "bad fuel pump" is sometimes (often?) actually a bad fuel line, especially in older RVs, The fuel line from genset to tank gets tiny cracks or soft spots and the pump sucks air instead of fuel. Sometimes it is just intermittent air bubbles that cause stall-outs or low power. When I saw you had a '94 Itasca, I kind of guessed you might be having genset fuel flow problems.
Before you replace the pump again, run a new piece of fuel line from the filter inlet to a gallon fuel can and fire up the genset. If that works, you know the pump & filter are fine and the problem is the line to the tank. You can also run a line right from the pump to the fuel can and try it if you suspect the filter.
Before you replace the pump again, run a new piece of fuel line from the filter inlet to a gallon fuel can and fire up the genset. If that works, you know the pump & filter are fine and the problem is the line to the tank. You can also run a line right from the pump to the fuel can and try it if you suspect the filter.
elbeau54
Member
I just changed my filter,pump, and all fuel lines. Now need to get to temp sensor and plugs .Less than 100 bucks
catblaster
Well-known member
FWIW, I replaced a gravity fed filter with a filter from an automotive filter and the fuel would not flow enough to keep up with the carb. Had to go back to a lawnmower filter.....Just thinking that if a fuel filter is on the suction side and there is any resistance at all it will drop into a negative pressure, that would allow the fuel to vaporize at a lower temperature...probably just over thinking this......
thanks everyone good info. gary you are exactly right .i jumped the gun and went ahead and changed the darn fuel pump again! fortunatly i figured out how to do it without dropping the whole generator out of the bottom to access the fuel pump on the side . the problem still continued . i ran the generator with a gas can and it runs fine. there is an issue with the feed lines or something in the tank . i am concerned though, in the line coming from the tank it has about a foot long section of hose right on top of the tank thats hard to get to.( any ideas welcome on how to change that section would be appreciated) then it goes to a hard line along the frame and then flexible to the generator i changed the line closest to the generator for now ill keep testing it . i also filled the tank because my fuel gauge does not work thinking it might be below the pick up point for the generator . it took 20 gallons to fill it should have had at least 15 gallons left . thanks again for the replies.
