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F 12 fuel pressure question

C

Craig45

Member
Seems to run ok at idle, some missing. With throttle out
engine runs rough. Valves, points, wires, plugs ok. Mag
snaps at TDC. When I open the carb drain, some gas comes
out maybe 3 tablespoons. Put carb kit in and adj float as per
spec. Now the question. With the fuel line disconnected from
the carb, as I crank the engine gas comes out but in small
squirts, kinda dribbles. Is this the normal flow or should it be
a lot more? There is good flow from the tank and the
sediment bowl is full, screen cleaned. I am stumped. Thanks
Craig
 
Try a small lawn mower gas tank and gravity flow gas to the carb,see if it will run first before rebuilding the fuel pump

jimmy
 
appears to be the fuel pump. when cranking should have a full stream shoot out under pressure. also check the fuel pump push rod for travel. if you dont have the travel, at least 5/16 of an in. you will have no pump lever action to build pressure. may require building up end of rod.
 
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