[MN99GT]

Just got a '89 4020 with the Onan 20hp motor. We went to change the oil last night, had NAPA look up the oil filter, but it was way too short... Does anyone have a part # for a NAPA oil filter for this motor?

Thanks!
Mike

 

[99flhr]

Just got a '89 4020 with the Onan 20hp motor. We went to change the oil last night, had NAPA look up the oil filter, but it was way too short... Does anyone have a part # for a NAPA oil filter for this motor?

Thanks!
Mike

Napa Gold # 1762 ? Most manufacturers have a short & long version of this filter. I suppose it depends on what brand of tractor the Onan was installed in. The shorty will work, just not as easy to install or remove

 

[Bob MacGregor]

For years I have used Motorcraft FL400S filters on my P series Onans. $3.99 at Walmart and many auto parts stores. I like the white painted filter as I can mark the engine hours and date on it with a magic marker. There is a rubber seal that fits over the oil filter after it is installed. Some folk throw the seal away, but I prefer to use is as Onan intended, it helps to reduce the leakage of engine cooling air around the oil filter.
Bob MacGregor in CT :mrgreen: :mowlawn:

 

[boomers_influence]

mike
the napa 1374 is correct for your engine.
the 1762 is made for the BIG block, that is why it is longer.
but, it will still work for you.
thank you. boomer ( the used onan parts guy)

 

[99flhr]

thank you. boomer ( the used onan parts guy)

And a darn good one ^ I might add :thumbup: