Re: Johnson Model Number Question, confussed.
Ok, that helps a lot. I found the pump now. But I don't run an oil tank, I premix my fuel. Doesn't look like there is a rebuild kit for this pump. Is there an issue running a VRO pump this way? Thanks.Fishhook/Chris
VJ90MLESB is indeed a 1990 90hp Johnson. It's perfectly okay to use that VRO as strictly a fuel pump, and yes you can obtain a rebuild kit for it.
(VRO Pump Conversion To Straight Fuel Pump)
(J. Reeves)
You can convert the VRO pump into a straight fuel pump, eliminating the oil tank and VRO pump warning system, but retain the overheat warning setup (and fuel restriction warning if so equipped) by doing the following:
1 - Cut and plug the oil line at the engine so that the oil side of the VRO pump will not draw air into its system. Trace the wires from the back of the VRO to its rubber plug (electrical plug) and disconnect it.
2 - Trace the two wires from the oil tank to the engine, disconnect those two wires, then remove them and the oil tank.
3 - Mix the 50/1 oil in the proper amount with whatever quantity fuel you have. Disconnect the fuel line at the engine. Pump the fuel primer bulb until fuel exits that hose with the tint of whatever oil you used. Reconnect the fuel hose.
That's it. If you want to test the heat warning system to ease your mind, have the key in the on position, then ground out the tan heat sensor wire that you'll find protruding from the cylinder head. The warning horn should sound off.
You say that you have spark but no fuel....... Do you have compression and if so, what are the psi readings of each cylinder? Spark BTW, with the spark plugs removed, should jump a 7/16" gap with a strong blue lightning like flame... a real SNAP! Does it? Note that the 7/16" gap is important. Testing spark via using the spark plugs is a waste of time.
No fuel....... When you pump the fuel primer bulb, does fuel pass thru the VRO and fill the carburetors? If so, you have fuel, temporarily at least, which should allow the engine to start and run for a short time. Is fuel present within the carburetors?
Starting procedure should be: Pump fuel primer bulb up until it is hard, Leave throttle in neutral position as engine has the "Fast Start" feature, Turn key to START position and hold key in (engaging fuel primer solenoid) until engine fires and starts... at which time release the key to the RUN position. Is this your method?
When one has proper compression, spark, and fuel within the carburetors... and using the proper starting procedure, and the engine does not fire.... the usual and most common problem is fouled carburetors.
