Fuel System Problem

JDTOOM

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I'm looking for some advice on an issue I'm having with my fuel system. I have a 23' Novi lobster boat with a 65 gallon SS tanks located in the deck under the wheelhouse. The fuel system does not appear to be vented. When adding fuel it backs up into the fill hose and wants to over flow. It takes a while and eventually settles into the tank. When I try to start the Suzuki 225 4stroke (2007) it acts like it's fuel starved. It will turn over rev and stall. I can get some fuel to the ball but it seems like the supply is not constant or interrupted at the fuel/water separator. I usually drain the filter and pump the primer and she'll start but right now I can't get any gas to the priming ball. When it's started it runs great but it's become a frequent issue. Any suggestions?
 

Field Tester

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leave the gas cap off and see if you get fuel to the primer ball and if the motor runs well. If so, then it's definitely the vent. If you still have the same problem, then you have a restriction somewhere in the fuel hose. The ethanol will sometimes make the inside of a fuel line seperate and collapse.
 

captchuck

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Do you know where your vent is? first thing to do is simply check the vent it self sometimes you can get something as silly an insect nest etc clogging it up.
 

JDTOOM

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Thanks. I did get her started today by disconnecting the vent hose and pumping the throttle like crazy. I was able to get gas down to the primer bulb and after a few tries she started up. I have the perko fuel fill and vent all in one and I'm thinking it doesn't provide enough of an opening for the vent.
 

eyschulman

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Do you have an air leak thats allowing fuel to drain while sitting? Does it start easy one half and one hour after shut down? Check all your hose fittings. A large OB priming bulb pump in the line can be used to cold prime.
 

JDTOOM

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It's either draining back into the tank or there's a leak in the hose somewhere. There's no evidence of fuel in the bilge though. Are you recommending a second primer bulb before the filter?
 
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