Technical Rotax Fuel Filter

Adam

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James 'Adam' Pell
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As per amendments in the new 2023 book it seems we now all must run a fuel filter in Rotax class? Why?

And how have you guys been getting on who have run one before? What's the lift span of them?

An in-line fuel filter as supplied by Rotax must be used between the fuel tank and fuel pump.

 
Can’t answer your question with regard to how they work with rotax I’m afraid Adam, but we use the for Honda as they’re better quality than most others available and have no issues. We change them about every 3 or 4 months, but there’s generally next to no debris in them. The transparent casing is slightly discoloured from the fuel inside but that’s about it.
 
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Can’t answer your question with regard to how they work with rotax I’m afraid Adam, but we use the for Honda as they’re better quality than most others available and have no issues. We change them about every 3 or 4 months, but there’s generally next to no debris in them. The transparent casing is slightly discoloured from the fuel inside but that’s about it.
Ahh that's a bit of good news then, thanks for the insight.

I ordered up a few the other day, seem pretty good quality. Just yet another outlay/expense I guess, not to mention something else to leak or go wrong :LOL:. I would assume they will need to changed pretty often with a 2 stroke, so gona see how it goes.

Part still seems readily available despite everybody now needing one/having to order some.
 
Do they need to be specific Rotax ones? Loads of other manufacturers about of similar ilk, with some half the price which may help if you prefer to change them out more often. It’s a big enough reservoir for it not to affect performance though, which is mainly the reason we went with these over some of the smaller ones generally used with 4 stroke.
 
The book now says this:

An in-line fuel filter as supplied by Rotax must be used between the fuel tank and fuel pump.

So yeah has to be a Rotax one, which is fine I guess. Least you'd hope it would be a decent quality part.

Little trick for fuel filtration: I put a stocking/tights in my funnel to act as a filter after I've mixed up and pouring from jug to tank.
 

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