Logo
FULL SITE MENU

1988 johgnson 90 vro pump

M

mitch hillier

Guest
" I have a 1988 johnson 90 vro

" I have a 1988 johnson 90 vro, I disconnected the vro and went with premix. what do i have to do to unhook the low oil warning in the control box, also , I unhooked the wires going to the vro pump and the fuel is not being delivered to the carbs without help from primer bulb. evidently the wires need to stay hooked ? Please help if you can "
 
" Replace the pump all the wir

" Replace the pump all the wires do is activate the alarm horn for no oil,low oil alarm sender is in the oil tank. "
 
Repair parts are available fo

Repair parts are available for the pump or you can install a 83 model pump the location to mount it is there on the block.
 
" Thank you for the info jupit

" Thank you for the info jupiterzeke,The motor started being starved of fuel so we had to manually use the primer bulb to keep it runnung. When loading the boat I noticed that the plug on the oil line intake had come off, would this have caused the fuel delivery problem?Also is the vro directly involved with the fuel pump?

thanks again,

mitch "
 
" VRO, a diaphragm driven by c

" VRO, a diaphragm driven by crankcase pulses. It in turn moves a diaphragm that pumps the fuel,and that diaphragm moves a piston that forces the oil into the gasoline. "
 
"Mitch... With the oil line pl

"Mitch... With the oil line plug being removed, missing, whatever, that portion of the pump is allowed to draw air. The following may be of interest to you.

(VRO Pump Conversion To Straight Fuel Pump)

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 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 quanity 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.

Joe (30+ Years With OMC)"
 
Back
Top