1. When you have the problem, unscrew the deck
fill fitting. If you hear a hiss and everything works, you have a blocked tank vent.
2. If it still has a problem, buy an outboard
squeeze bulb and a length of clear 3/8 in tubing.
3 Take off fuel
hose at Racor
inlet and put it on inlet to squeeze bulb.
4 Put clear tubing on outlet of squeeze bulb and try to pump
fuel out of tank into a bucket.
5. If it doesn't pump
easily, you have a blockage between the tank and the filter--maybe the pickup tube, maybe an elbow
, maybe the shutoff valve. A quick fix is to blow backwards through the hose until something pops loose.
6. if it pumps easily, but you see tiny bubbles, you have an air leak.
7. Repeat the process with the squeeze bulb after the Racor
outlet. I have found air leaks
in spin on Racors.
8. Repeat the process with the squeeze bulb after the secondary filter. A misaligned gasket
on the secondary is a classic
problem. You can also pick up air leaks
in the fuel pump
9. If you haven't found anything yet, hook the squeeze bulb up before the Racor inlet and put the output on the let of the Racor after bleeding the air out with the bulb. Run the engine
until the problem occurs, then use the bulb to pump fuel while you are trying to start. If it starts, it could well be a dodgy fuel pump