Fuel filters 582

by Lanny Worley in General Tech Discussion 11 years ago

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Re: Fuel filters 582

by Nick Axworthy » 11 years ago

Nick Axworthy

16 325 0

I used to have a sintered bronze filter on my 503...my inspector told me to remove it as they can cause blockages...not sure what spec it was...it was in a round 2 piece housing around 25-300mm long and a gold colour,

Maybe at 40-70 its just to fine and wont take much to block it...just a thought,

Over here in the UK its surprising just how much crap there is in our fuel.

Nick.

Thank you said by: Lanny Worley

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Re: Fuel filters 582

by Lanny Worley » 11 years ago

Lanny Worley

1 2 0

Thanks, Nick
I am confused as Rotax clearly states not to use a paper filter, which came with the Quicksilver kit.
If a bronze filter caused problems I guess the only thing to use is a Stainless type. Lanny

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Re: Fuel filters 582

by Nick Axworthy » 11 years ago

Nick Axworthy

16 325 0

I have no idea myself if it would cause probs but as I say I was advised not to use it as other he said had had problems...at 70 micron it seems much finer than rotax specifies,

I use this type...unfortunately I have no idea of its spec...but at least I can see the gauze.

http://www.ebay.co.uk/itm/Re-Cleanable-Chrome-Glass-Inline-Fuel-Filter-6mm-MORRIS-/150606505315?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item2310d8e563

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Re: Fuel filters 582

by bill martin » 11 years ago

bill martin

10 757 0

I have used the SS filters like the one Nick shows and also the sintered bronze filters with good results. I wouldn't worry too much about the micron size. 150 microns is much smaller than any carb jets or galleries. Only in fuel injected engines does micron size become important. Despite the Rotax recommendation, I use paper filters in my 912S.

The Rotax recommendation is there for good reason. Never use paper filters with fiberglass fuel tanks, with older fuel lines that are not rated 30R7 or higher, or systems that have recently switched over to ethanol/mogas. Ethanol does not hurt paper filters. Millions of new cars are sold every year and they all have paper filters.

The problems usually arise when older systems have been recently switched to ethanol. The ethanol, which is a solvent, begins to loosen old deposits which will clog paper filters because they filter down in the 10-20 micron range.

I reiterate. THE ROTAX RECOMMENDATION IS WELL FOUNDED AND SHOULDN'T BE IGNORED. That being said, I prefer the paper filters because they are cheap, they are ethanol resistant, they filter much better than SS or bronze (10-20 microns), they have a huge filtering area in sq/in compared to the others, and they have a very low pressure drop across the media. All things being right with the rest of the fuel system, I have found that the paper filters are OK.

Bill.

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Re: Fuel filters 582

by Hans Meier » 11 years ago

Hans Meier

2 15 0

I also used this Type of Filter until the thread inside failed and the engine stopped.

179_gewinde2_1.jpg (You do not have access to download this file.)

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Fuel filters 582

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