Do we have a fuel filter? If so, where is it and after how many miles should it be replaced?

It's in the fuel pump under one of the rear seats. supposed to be changed every 100,000 miles along with the pump.

expo to the rescue!

are you serious ?

are you serious ?

:scratchhe

Seriously, I can't tell if Expo is being sarcastic or not. I've seen fuel filters get really nasty after 10k pretty regularly, and using premix I can only assume the worst, then again I know not everyone premixes.

Of course, I've never heard of changing the fuel pump until it goes out either so, I'm interested to find out if he's joking or not. :lol2:

Expo's never sarcastic. He gives the straight scoop - you can count on it.

A lot of cars don't specify any interval for replacing the fuel filter. It's not like the old days when you could expect the inside of the tank to corrode and drop crap into the fuel system.

Ken

What Expo said is true, at least according to manual.

but I just replaced my fuel pump myself couple weeks ago like 42K miles. cuz the pump is no good, the fuel filter inside look like crap.

Premix shouldnt clog filter like that. Its the other crap in the gas that causes it.

I said "Are you serious" because I cant believe that Rotary Rasp asked the question.

I had my working fuel pump changed at 100,000 (32,000 pre-mix) for schedule maintenance reasons. So putting 100K miles on it can be done. I sent my old one to Old Dragger to look it over but I guess he never got around to it. A while back fuel pump issues was a big deal to him.

I looked at it --remember. it was approx the same condition as Silvereights and mine.No worse. We spoke briefly via pm's I believe.
Matter of fact i still have it in a box somewhere. God how long ago was that--8-9 mos ago?
Olddragger

I said "Are you serious" because I cant believe that Rotary Rasp asked the question.

I'm entitled to newb questions too!

Seriously though, I never hear of anyone changing their fuel filter in the 8.

What is the part number and how much is it?

not sure on the actual filter, couldn't find it online.
Fuel pump = $133

I do not think the filter is "replaceable"

I think it's all one piece. Would it be possible to take it apart and clean it?

you probably COULD do that, but probably not advisable. Just put in a new pump.

^^+1

Since u have it out anyway, might as well just replace it.

oh also, dont be cheap about the gasket. cuz fuel tank leak is not going to be funny.

I just got a new motor and thought it would be a good idea to clean the fuel filter.

raspy is part of the new engine club...

I think it's all one piece. Would it be possible to take it apart and clean it?

Don't think it would be that easy.

it looks like a f00king bomb! ;)

it looks like a f00king bomb! ;)


It really does! lol

Well, it is possible to take it apart, u just need some time, u'll need a flat head screw driver :)

but, hmm, when I replace my pump i ran out of patience. So I just took my hammer out and smash that filter into pieces minus filter.

It is a BOMB!

yeah under the seats and expo does always give a straight forward guy idk if i would wait 100k miles but maybe 50 75k but it def is possible for 100k

Premix shouldnt clog filter like that. Its the other crap in the gas that causes it.

Crappy premix that is not designed for fuel injection will clog up the filter in no time flat.

People use a lot of crappy paraffin based pre-mixes that are designed for carbed motorcycles and old snowmobiles and expect that it can fit through the 150mc screen of the filter. It won't and it will clog into a waxy mush when used with some other additives (like many of the so-called fuel cleaners and treatments).

Well I do apologize, didn't mean to demean Expo in any way. :)

It doesn't surprise me considering the many other things that are different on this vehicle from a conventional automobile, I personally had just never heard of replacing the pump for maintenance reasons, but I had always replaced the filters fairly regularly.

Seeing that this is all one piece I can understand why you would change the pump out for maintenance reasons since you can't just change the filter by itself. I guess in short, thanks for the info, I was actually thinking about doing this soon and so I learned something helpful! (New engine as well, 3k miles in the car when I bought it).

Crappy premix that is not designed for fuel injection will clog up the filter in no time flat.

People use a lot of crappy paraffin based pre-mixes that are designed for carbed motorcycles and old snowmobiles and expect that it can fit through the 150mc screen of the filter. It won't and it will clog into a waxy mush when used with some other additives (like many of the so-called fuel cleaners and treatments).

Are Idemitsu and Red Line SI-1 crappy ?? :lol2: :lol2:

I am thinking the crap on my old fuel filter came from all the junk in the gas. who knows ? :)

Im happy with my new pump, but I will probably replace it again @ 60 something 70K, just to be sure that my car can run as best as it could.

Are Idemitsu and Red Line SI-1 crappy ?? :lol2: :lol2:

I am thinking the crap on my old fuel filter came from all the junk in the gas. who knows ? :)

Im happy with my new pump, but I will probably replace it again @ 60 something 70K, just to be sure that my car can run as best as it could.

No, I think you mis-understood.

Good pre-mix is fine. I know Idemitsu is fine, but have not looked at the Redline SI-1 to see what it is based on, but I would guess it is fine too.

Its the crappy stuff that people buy in motor cycle shops for a gallon for $10 that runs into trouble.

And the other issue is mixing pre-mix with other gas additives. For example MMO or Lucas. Those tend to be parafin based and mixed with a pre-mix will clog up pretty fast as they tend to clump, instead of suspend (mostly the Naphthenic Hydrocarbons that both contain- and which is often used in drilling muds) MMO themselves recommends not using more than 25% of the recommended levels when using with Pre-mixes.

No, I think you mis-understood.

Good pre-mix is fine. I know Idemitsu is fine, but have not looked at the Redline SI-1 to see what it is based on, but I would guess it is fine too.

Its the crappy stuff that people buy in motor cycle shops for a gallon for $10 that runs into trouble.

And the other issue is mixing pre-mix with other gas additives. For example MMO or Lucas. Those tend to be parafin based and mixed with a pre-mix will clog up pretty fast as they tend to clump, instead of suspend (mostly the Naphthenic Hydrocarbons that both contain- and which is often used in drilling muds) MMO themselves recommends not using more than 25% of the recommended levels when using with Pre-mixes.

I use the MMO at 2oz per eight gal. What % is that?

I use the MMO at 2oz per eight gal. What % is that?

Next to nothing. (around 0.195312%)... near 1/5 of 1%

or 512 to 1. So it is too little to help or do anything other than make your wallet shrink.

Normally pre-mix is used around 300 (or 250) to one with a functioning MOP or 100 (to 200) to 1 without a functioning MOP on rotary engines.

MMO's own site says if you are premixing not to exceed 25% of the premix with MMO.

So if you were putting in 8 oz of premix per 15 gallon fill up, then you should not add more than 2 oz of MMO per that 8 oz (however they also note, that they have heard of cars running no premix and using all MMO as premix with no ill effects, however based on the composition of MMO; I can not recommend that in anyway shape or form). I am sure that the reason they are saying no more than 25% is due to chemical clumping issues when used with some pre-mixes.

It's just good"preventive maintenance" to replace it when you can, rather then when you have to and wish you did.