My starving Johnson ?

[FishyBC]

I have a 1974 Johnson 25 HP outboard. I went fishing last night and on my way up river it was fine (15 mins). On my way home after fishing, I went upstream about 2 mins and the motor started to rev down. It sounded like it was starving for fuel so I pumped the bulb on the fuel tank and it reved back up to running RPMs. It would go for 20-30 seconds and then it would start to sound like it was close to stalling again. I was able to get someone to pump the bulb while I drove and we got the ten minutes back to the boat launch.<br /><br />What could this be? Fuel pump? plugged line? What? This is the wrong time of year for this to happen. Any thoughts would be appreciated.<br /><br />Thanks<br />Pat

 

[NathanY]

Re: My starving Johnson ?

Well, most likely if you can pump it and make it run, it is either an air leak or fuel pump.

 

[FishyBC]

Re: My starving Johnson ?

JB, I found your reply to someone a while back about symptoms of a bad Fuel pump. <br /><br />---------------------------------------------<br />1. Engine dies about 30 seconds after start.<br />2. Engine will run if you keep pumping the primer bulb.<br />3. Engine runs okay at low to medium speed, surges at high speed.<br /><br />Good luck. <br />-----------------------------------------------<br />I think that sounds exactly like it. Could it possibly be the tank ? How difficult is it to replace or rebuild a fuel pump on a 1974 Johnson 25 HP ? I have looked on Iboats and on other sites and haven't found a kit or a pump for this motor. Where can one be found.<br /><br />Thanks again<br />Pat<br /><br />P.S. Did I post this somewhere other than Johnson Troubles ? Sorry if I did. I did post it twice accidently (won't happen again