HELP! crankcase full of fuel

i took my superjet out for the first time a week ago. (got it used and re did it) never rode one before until then but anyway it worked great for about 15min. Ripped your arms off and then i came into shore and went back out and soon after that it lost almost all power. I came in and called it a day. started it up the next day out of the water and everything seemed fine so i went for another ride and right from the get go it had no power. I wasn't sure if it was spark so i tested that and then gave the carbs a look over and when i took them off i noticed my crankcase was full of gasoline. I checked the needle and seats of both carbs and they seal. What i am wondering is if the tank check valve is bad. My theory is that the tank is pressureizing and forcing fuel through the primer and into the carbs while its not running. Is there a way to test that little white check valve on the vent of the tank and also what line should the primer be tapped into. Right now its robbing fuel from the carb vent tube(i think it is cuz its not the fuel line) and maybe the primer is incorrectly installed. If anyone has had a similar problem and knows how to solve it i am all ears.

Thanks Guys
 
well i don't have a pop off tester nor do i know how to test it. Are you supposed to be able to blow through the check falve or suck through it? And also what line should i have my primer hooked up to?
 

ger87410

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I'd think have the primer hooked up to the main fuel line.

The check valve has an arrow on it showing the direction of flow. My 550 didn't have a check valve for a while without issues. Leave it off for testing.

Post pics of your spark plugs. Verify spark in both cylinders. What's the compression? Rent a gauge from autozone if you don't have 1.

Hopefully the fuel in the crank case had oil in it. :bigok:

Excess fuel in the crankcase is normally blown out/used up by high rpms. Atleast fuel is getting through the carb. :wink:
 
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