dodgy starting f75

[nid]

Hi All,
I have an F75 in a 1992 fourtrak (rocky) and it has develped a confusing problem. Shortly after changing the fuel filter it has started to run for about 2 secs and then stop on startup if you catch my drift.

It seems as if there is air in the fuel line but there is good pressure all thorugh it and if you undo the banjo at the engine end of the fuel line (at the injector pump?) you certainly get a good spray of fuel out.

Now I know you are all going to say that it is air, but I have cranked, pumped and started this thing at least 20 times and it is no different.

When I undo the fuel lines at the injectors I get fuel dribbling out rather than spurting so I suppose it must be some sort of pump problem - am I correct?

If so, where do I look next? are there two pumps - the lift pump and the injection pump? If so, where do I find the lift one? could it be that it is blocked at all?

HELP!

Thanks

NID

[BundyRumandCoke]

Yep, its air, not bled properly. Get it running as best you can, and undo the fuel line at the injector while its running. Do it up again when you have no bubbles.

[Big-Stu]

I had a similar problem after installing an extra in-line fuel filter.
Damm thing would idle fine but as soon as I gave it a bit of throttle it would die.
I bled it a hundred times and called it all sorts of names but that didn't fix it.
Turned out one of the fuel line fittings was not sealing properly and was letting in air. Since you recently changed your fuel filter I would be looking very closely at the seal around the filter.

Stu