BoatBanter.com - View Single Post - Fuel Delivery problem on Johnson 60 horse

K. Smith

wrote:
I posted earlier this year....Rebuilt the cars, new plugs and fresh
gas, it was running well until last week.
At WOT it was dying and would stall. I found that when I pumped the
fuel line bulb, it would run fine. Since then I have put in the VRO
rebuild kit ( Diaphragms ) . The vacuum line seems to have proper
suction, I even bought a new OMC line to go from the tanks to the
engine. I have the problem with both tanks, so ,
I don't think it's the tanks, or the line to the engine. Really at
this point, I'm not sure where else to look! I'll be replacing all the
gas lines in the engine first. The only thing I can think of is maybe
there's something else in the fuel pump I've overlooked. After all
this, I hope I don't need a whole new VRO pump! Already spent $150 for
kit and lines!!
Any help would be great, thanks!!

Make sure you put 50:1 in the fuel tank, don't rely upon the VRO even
more so if you even remotely suspect the fuel pump; or more generally in
an older engine.

You've done the fuel pump you say?? so if the problem persists but then
comes good when you squeeze the bulb check;

(1) Before you outright replace the fuel line, particularly the
connections (both ends). If it's a plug fitted line, the small "O"ring
seals leak & allow air to bleed in.

(ii) The fuel tank(s) has a one way valve in the outlet which can get
blocked &

(iii) The air vent into the fuel tank might be blocked (partially it has
a very fine anti spark gauze in it)

K