motor stops after 1/2 hour

John Noble · #1 (**permalink**) 09-13-2011, 07:38 PM

7 1/2 1971 johnson with new gas line from old tank to motor. It cuts out after 1/2 hr. and gas bulb has lost it's pressure. After pumping up again motor starts fine. Could there be an air leak where I put on new clamps?

boats.net · #2 (**permalink**) 09-14-2011, 08:29 AM

Could be an air leak, could also be a bad fuel pump.

Rebel Sympathy · #3 (**permalink**) 12-11-2011, 07:48 PM

Quote:

Originally Posted by boats.net

Could be an air leak, could also be a bad fuel pump.

Can also be a bad primer bulb - especially if it is an aftermarket gray colored primer bulb. Replace with genuine oem part.

cosmo1957 · #4 (**permalink**) 12-12-2011, 01:32 PM

You may be getting air lock in the tank..... open the gas cap up ...and see if you are creating vaccuum in the tank.... I was on the lake w/ my 25 HP and couldn't get it restarted and it was just simply too much vacuum pressure built up in the tank so it wouldnt draw any more fuel.