johnson 120 vro ,no fuel pressure

[highisland]

Hi guys, I have a mid 80,s 120hp, it doesnt seem to be producing any fuel pressure from the pump. Ive stripped the pump and inspected diphrams, everything seems fine. The pipe coming from the bottom of the engine to the bottom of the pump does not seem to be producing much vacuum or blow, when I hold my finger over it and crank the engine over.
How much pressure should I feel here on cranking .

 

[ezeke]

Re: johnson 120 vro ,no fuel pressure

The movement of the piston should provide a steady pulse for the pump as the piston moves in and out. It usually run off the #4 cylinder on the V4 engines.