Incorporating a Fuel Filter In 51 Cub, good or bad idea?

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Gary1959
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Incorporating a Fuel Filter In 51 Cub, good or bad idea?

Postby Gary1959 » Tue Oct 31, 2017 9:18 am

Fuel Filter On Cub.JPG


Saw a picture on another post showing a Cub with an fuel filter incorporated in the middle of the copper fuel line. On one hand, it makes sense to protect the engine from impurities but on the other, it changes the look of the original Cub (albeit not in a big way). What do some of you Cub purists think of doing this? Maybe a little dirt getting through won't hurt a thing. I'm not an engine expert so I'm not sure its worth it. Just want to protect the engine which up to now, purrs along very nicely. Input always appreciated.

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Re: Incorporating a Fuel Filter In 51 Cub, good or bad idea?

Postby Super A » Tue Oct 31, 2017 9:21 am

A good sediment bowl is just as effective, but a filter like that works.

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Re: Incorporating a Fuel Filter In 51 Cub, good or bad idea?

Postby Urbish » Tue Oct 31, 2017 9:26 am

A little bit of sediment won't do much harm to your engine. But it will plug up the jets and ports in the carburetor. As long as the filter is large enough and allows adequate flow, there's no harm in adding one. I would add that if you're getting lots of crud in your fuel lines, you'd be wise to tackle the underlying problem (rust and crud in the fuel tank). Epoxy coating the inside of the tank with a product like POR-15 and ensuring that you keep your gas cans clean inside (and out) is a great way to ensure hassle free operation for years to come.

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Re: Incorporating a Fuel Filter In 51 Cub, good or bad idea?

Postby Willy » Tue Oct 31, 2017 10:19 am

When mine was doing the parades and local shows 15 years ago, I put one of those chrome/glass re-usuable filters in the line between the sediment bowl and the carb for my father in law. The sediment bowl catches most of the trash and in line filter gets what the bowl misses. We couldn't tell any difference in how the Cub ran.

I just cleaned both yesterday. Probably an inch of sediment in the bowl and the in-line just a very little bit. The bowl strainer had a couple of small tears though.
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Re: Incorporating a Fuel Filter In 51 Cub, good or bad idea?

Postby Bill Hudson » Tue Oct 31, 2017 11:21 am

Here is what I do for fuel filtration, starting in the fuel tank:
http://farmallcub.com/phpBB2/viewtopic.php?f=139&t=94154

Then a new screen and gasket in the sediment bowl.

I follow this up with an in-line fuel filter (I'm sorry that the pics are no longer part of the post):
http://farmallcub.com/phpBB2/viewtopic.php?f=139&t=38266
You will be the only one that knows about this filter, unless you tell 'em.

The final filtration is the screen in the carb.

Overkill? You betcha!

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Re: Incorporating a Fuel Filter In 51 Cub, good or bad idea?

Postby outdoors4evr » Tue Oct 31, 2017 12:22 pm

You asked a purist, and that isn't me, but the purist would probably not have a rubber fuel line or a filter. The purist would probably also spend more time "working on the cub" than "working the cub".
I use a filter like the one shown on my 184. If you do decide to use a fuel filter, make sure it is a gravity filter and not one that must be used with a fuel pump.
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Re: Incorporating a Fuel Filter In 51 Cub, good or bad idea?

Postby staninlowerAL » Tue Oct 31, 2017 12:58 pm

There's several different fuel filter ideas in the HOW TO forum to choose from. The purist (not me) would say that it's not needed if the fuel system is kept clean and clean fuel is used and if IH had thought it was needed they would have come from the factory with one.

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Re: Incorporating a Fuel Filter In 51 Cub, good or bad idea?

Postby inairam » Tue Oct 31, 2017 1:34 pm

outdoors4evr wrote: If you do decide to use a fuel filter, make sure it is a gravity filter and not one that must be used with a fuel pump.


This is very important. It is very easy to starve the Cub engine of fuel.

I personally do not run an inline filter. I do not really see a need. I do clean / replace the mesh screen and the clean the bowl every season. I am also very careful about my gas cans. I am considering one of those in-tank filters that get epoxied to the bowl assembly.

Also I do not like the idea of a rubber hose with an underslung exhaust. I am ok with it on a vertical exhaust.

If you get a "new acquisition" with a dirty tank It is best to remove and clean the tank than to rely on a filter to clean the fuel.
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Re: Incorporating a Fuel Filter In 51 Cub, good or bad idea?

Postby ScottyD'sdad » Tue Oct 31, 2017 2:18 pm

staninlowerAL wrote:There's several different fuel filter ideas in the HOW TO forum to choose from. The purist (not me) would say that it's not needed if the fuel system is kept clean and clean fuel is used and if IH had thought it was needed they would have come from the factory with one.


If the tank is clean, and the fuel is clean, (No rusty metal fuel cans), you shouldn't need added filtration. I've used cubs for a half century, without added filters. Stamped on the original fuel covers, "use clean fuel, keep it clean".
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Re: Incorporating a Fuel Filter In 51 Cub, good or bad idea?

Postby Mike in Louisiana » Wed Nov 01, 2017 8:03 am

And keep your gas can spout and filler neck on cub CLEAN.
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