fuel vacuum problem

[Aqua KNOT Sea]

So i own a 23 year old wellcraft with a 4.3 merc in it. I was having water in fuel, so I put a fuel water seperator on her. Also i have fixed the water getting into fuel issue. I think. I have had nothing but trouble with the fuel system since. The engine just cuts out while on plane. I can pull back on the throttle and most of the time she will run ok . When I take the seperator off, i hear air release. This makes me think that for some reason the seperator is restricting the flow of fuel. Am i crazy. The seperator i have is the kit which has the mount and the filter. There is no bowl to drain.help

 

[Don S]

Re: fuel vacuum problem

Sounds like the fuel tank vent is plugged up.

 

[Aqua KNOT Sea]

Re: fuel vacuum problem

Weird thing is that the care make a different sound when the problem ia happening. I almost like a louder air sucking sound. I thought it was just during off water.

 

[Aqua KNOT Sea]

Re: fuel vacuum problem

I ment care and how do u check for a plugged fuel vent. Just take off at gas tank and put compressed air through

 

[Aqua KNOT Sea]

Re: fuel vacuum problem

Ok update. Checked the vent and everything is fine. What next?

 

[wellcraft-classic210]

Re: fuel vacuum problem

This post is a little hard to follow -- but perhaps you could hook up a fuel pressure gauge & monitor it while the problem occurs. ( make sure it does not leak for fire safety reasons )

If the pressure does drop you most likley have a restiriction of some type that could be caused by debris blocking a passage. filters & the check valve in the barbed fitting coming off the tank pickup are common areas.

If the pressure does not drop the problem it inside the carb or elswhere.