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Topic: Fuel filter (Read 639 times) previous topic - next topic

Fuel filter

Here's one for the books. My fuel filter is 3391 Napa fuel filter so to make it simple
I went to Napa and bought a couple filters. Went to put it on and it wouldn't screw
on. Turns out the threads are a larger diameter then the one that was on. There is
a screw up somewhere. I will find out on Friday. The new filters are 3391
Peter and Frieda Morin
1999 36ft. U320 Foretravel
Build # 5436
1998 Suzuki Sidekick Sport

Re: Fuel filter

Reply #1 –
Look up the specs of the fitted filter for thread size  and filter microns size .
Make sure thaT interchange matches.

Re: Fuel filter

Reply #2 –
I kind of wonder.
Our coach has two fuel filters and in order to keep the micron filtration of each filter in the proper order (coarse then fine) the filters have different thread sizes so this "slightly above average idiot" doesn't put them on wrong.
Maybe yours also?
Nitehawk,  Demolition Lady, & our NEW master, Zippy the speeding BB cat.
1989 Grand Villa 36' ORED
Oshkosh chassis, 8.2 DD V8
2006 Saturn Vue AWD

Re: Fuel filter

Reply #3 –
Went to Napa and returned the filters and gave him the number from the Tech
manual and that filter was a 3386. He has no idea why the difference in the 3391.
The 3391 filter that was on the generator was bought in the States and the new
ones were bought in Canada but I think they should be the same. The 3386 fits.
Peter and Frieda Morin
1999 36ft. U320 Foretravel
Build # 5436
1998 Suzuki Sidekick Sport

Re: Fuel filter

Reply #4 –
And, is it the correct micron rating? Shows to be 10 micron with is OK for a primary fuel filter.

Most secondary filters will be finer/smaller micron rating.
Brett Wolfe
EX: 1993 U240
Moderator, ForeForum 2001-
Moderator Diesel RV Club 2002-
Moderator, FMCA Forum 2009-2020
Chairman FMCA Technical Advisory Committee 2011-2020

Re: Fuel filter

Reply #5 –
DUH!! He was looking for a fuel filter for the generator, NOT the engine.
Nitehawk,  Demolition Lady, & our NEW master, Zippy the speeding BB cat.
1989 Grand Villa 36' ORED
Oshkosh chassis, 8.2 DD V8
2006 Saturn Vue AWD

Re: Fuel filter

Reply #6 –
Quote from: nitehawk –
DUH!! He was looking for a fuel filter for the generator, NOT the engine.

Sorry, don't see application in the write up.

And, may or may not be correct for the generator.  Check with generator/generator power plant for their specs.
Brett Wolfe
EX: 1993 U240
Moderator, ForeForum 2001-
Moderator Diesel RV Club 2002-
Moderator, FMCA Forum 2009-2020
Chairman FMCA Technical Advisory Committee 2011-2020

Re: Fuel filter

Reply #7 –
Thanks Wolfe that's great idea. When I go out to Isuzu to get my thermostat I will
check with them and I will pick up a spare filter from them.
Peter and Frieda Morin
1999 36ft. U320 Foretravel
Build # 5436
1998 Suzuki Sidekick Sport