120HP Johnson 1995 Problem

[foggy]

I have had a small issue in my last two trips. Everything goes fine for the first 4 or 5 minutes and then the engine revs die down to a max of about 4400rpm. I think it is a fuel blockage problem. After the first time, i emptied the tank and fuel hoses, put new fuel in, but the same thing happened today. On both occassions after a couple of minutes, the first time back towards the ramp, the "blockage" clears and the engine does not miss a beat all day. It happened both times about 2kms from the ramp. Almost the identical spot, so therefore the same amount of running time. Any thoughts.

Foggy

[Chimo]

Check the fuel pump diaphram. Could be this maybe?

Spring on one side could be dicky.

Hard to find the first time but I had two motors go with the same issue 10 hrs apart Go figure!!

Chimo

[Noelm]

first off, have you got a complete tank and hose assembly to try? if not, when the motor dies, check the primer bulb to see if it is still firm, and maybe even give it a few squeezes, you have to eliminate the "easy" stuff first with some very basic trouble shooting.

[foggy]

Chimo,

I will get the mechanic to check that as well.


Noelm,

Yep tried a seperate tank and line and also pumped the primer bulb(felt normal). Neither of these worked.



Foggy