Originally Posted by northiam
Help I have a 750 DP HP on performer manifold spitting fuel out the booster jets when the engine is hot and turned off. I have installed a 1/2" heat spacer, insulated the fuel line, lowered the float levels 3mm lower than the IO, which has delayed the problem but after a few hours running it happens again!!! The fuel pump pressure can get up to 7 psig. max. Any ideas
The most common problem for this condition is a stuck or floating needle. Check to ensure that you don't have some material entering the carburetor float bowls from the tank. Ensure that you have a fuel filter and that no debris is traversing the filter to stick up the needle or its seat.
It is possible that the springs and/or seats (probably rubber tip on the needle) are in need of replacement. Another possiblity is a leaking float. Check to see if your floats are air tight. Pull them out and rattle them to see if they have fluid inside of them. If the fuel is coming from both primary and secondaries, then check them both otherwise, just check the side that is bleeding fuel.