4.3 cobra I/O no gas to carb please help!!

naenae13

Recruit
Joined
Jun 19, 2014
Messages
2
I have a 4.3 litre cobra I/O engine I have replaced everything from the battery, plugs, distributor, coil, condenser, points, so everything but wires to make it fire. Finally got it to fire then no gas to carb..replaced pump still no gas to carb??? Filter/separator is also new. Also I paid to winterize at end of season last year hasnt ran since. It runs when gas is manually put in carb. PLEASE HELP!!:)
 

Howard Sterndrive

Rear Admiral
Joined
Nov 5, 2008
Messages
4,603
you might have more than 1 filter - sometimes there's one in the inlet fitting of the carb. Anti siphon valve at tank pickup fitting may also be clogged or stuck shut.
 

naenae13

Recruit
Joined
Jun 19, 2014
Messages
2
Thank you for tips, gonna go look for the other filter right now!! An im gonna check the siphon valve. Thanks again!
 

HT32BSX115

Supreme Mariner
Joined
Dec 8, 2005
Messages
10,083
Finally got it to fire then no gas to carb..replaced pump still no gas to carb??? Filter/separator is also new. Also I paid to winterize at end of season last year hasnt ran since. It runs when gas is manually put in carb. PLEASE HELP!!:)
Howdy,

You still haven't covered all the possible fuel related issues.

You need to open up the tank and look inside (possibly through the gage sender hole)

You have an anti-siphon check-valve and a fuel pickup screen, and a vent in the tank.

It's probably not the vent but if that anti-siphon check-ball is plugged, stuck or the screen is plugged with debris, you'll never get fuel to the engine.

Another way to isolate the problem would be to get a portable tank and hose and connect it directly to the fuel line from the tank and see if the engine will run on it.

Regards,


Rick
 
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