Everybody please read this
#12
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common problem. I even see the fuel pick up tube that has a rubber fuel hose attached for an extender that has a screen in it. The rubber fuel hose falls off and or comes apart, When the fuel level goes bellow 3/8 of a tank it sucks air. Also seen the rubber fuel hose gum all up as well. Another reason to test with a remote fuel tank and own that set up.
#14
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I've been fighting fuel related issues on my 78 Nova 250. I removed the pick ups and looked at them but never ran a wire thru them. I know what I'm doing this weekend. I have been driving my self crazy chasing a lack of rpm for 2 yrs. 4000rpm and 50 to 53 mph.
#15
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I mentioned this in another thread. 88 Wellcraft this summer....removed fuel sender - float was cork. Drained all the fuel so I could look at fuel tank and found piece of the cork wedged under the fuel pick up inlet. Who would have figured.
#16
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Testing the fuel tank side of things. ie the fuel pick up - anti siphon valve - connections at the tank. One can check vacuum hg s coming out of the fuel line by hooking up a vacuum tester inline and running the engine .
Or take a fuel line with a primer bulb exactly like what outboard boats use. Unhook your fuel line at the gas tank and install your new fuel / primer bulb fuel line. get a clear jar - use the primer bulb to siphon the gas into that clear jar - this also will show the condition of your fuel and if any water present. You will know if the fuel flow is restricted or even a broken off fuel pick up tube by doing this testing as well.
Or take a fuel line with a primer bulb exactly like what outboard boats use. Unhook your fuel line at the gas tank and install your new fuel / primer bulb fuel line. get a clear jar - use the primer bulb to siphon the gas into that clear jar - this also will show the condition of your fuel and if any water present. You will know if the fuel flow is restricted or even a broken off fuel pick up tube by doing this testing as well.