I've been a lurker for a long time and I've always been able to find answers without bothering all you experts... now I have a problem I can't answer.
I've had fuel pump issues all summer. With my 80 gallon internal tank, I think condensation combined with questionable gas availability on the Ohio River has caused some water in my tank. I installed a fuel/wter seperator filter and problem solved - for a while. Last week, we were out and had trouble keeping the motor running. Is seemed to not be getting any fuel. We figured out that is someone kept squeezing the bulb, we could limp on back to the dock. I checked all fittings and replaced a questionable section of hose. No help with the problem.
After reading many posts here, I ordered a fuel pump rebuild kit. (I should add that the previous owner of the 1988 Johnson 200 had the oil mix side of the fuel pump disabled). Upon inspection, I fould that the diaphram for the fuel pump was ripped and I thought I would be good to go when I got everything together- nope, same problem. Upon closer inspection, I notice a little bit of seepage out of the back of the fuel filter where the oil mix part is attached to the fuel pump. Could the tiny amount of seepage be enough to diminish the vacuum action of the pump? Everything seems in place and tight and the motor starts up once you get the squeeze ball hard - it just won't stay running...
my thought on the slight leak is that the little triangular o-ring that used to seal the oil pump part of the fuel pump might be damaged or unseated and it is causing the problem... I just wanted to get some feedback before I took the whole assembly apart again. Are there any other obvious places that a leak could cause the pump to be so weak?
I appreciate any suggestions.
John in Louisville, KY