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Johnson VRO Failure Info

R

Ron Galloway

New member
I have a 1994 Johnson 150 Faststrike that the no oil warning comes on intermittently. The oil tank and filter are clean and I see no obvious air leaks in hoses. Can someone please help me figure out what is going on? Does the vro pump fail intermittently or all at once? For the rest of my fishing trip I added oil to have a 50:1 ratio in the tank. I just don't don't understand how a bad pump would work some of the time and then not other times.
thanks!
 
1 of 2 things pump or sensor failure there is a test procedure for the pump. Maybe somebody here knows what the procedure is. Check all the wiring connections and keep running the 50-1 or disable the oil side and go to premix. Or you have an vacuum leak and you can't see it
 
Last edited:
You requested... Also replied via PM:

(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.

Thousands of parts in my remaining stock. Not able to list them all. Let me know what you need and I'll look it up for you. Visit my eBay auction at:

http://shop.ebay.com/Joe_OMC32/m.html?_dmd=1&_ipg=50&_sop=12&_rdc=1
 
The alarm may appear intermittent but the fault is not if the oil flow rate is reduced and now close to the detection threshold.
 
joereeves said:
You requested... Also replied via PM:

(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.

Thousands of parts in my remaining stock. Not able to list them all. Let me know what you need and I'll look it up for you. Visit my eBay auction at:

http://shop.ebay.com/Joe_OMC32/m.html?_dmd=1&_ipg=50&_sop=12&_rdc=1
Click to expand...

Thanks, Joe. I have another question though and hope I can explain to where you can understand it. I have disconnected the electrical connections, taped them and put them safely out of the way. I know that I can cut the oil supply line and put a bolt into it to stop the pump from trying to suck oil. I looked at my engine and my service manual and the oil line that comes out of the pump runs a short distance down to a clear plastic sight tube that is right inside the engine where all the lines enter the engine. I would like to disconnect this short hose and its clamps and then put some type of plug in the pump and in the clear site tube where these lines connect. In my manual it references using a protective cap (pt. number, 315391) and clamp (pt. number, 322654) to plug the pump inlet. Do you know if the same protective cap and clamp can be used to plug the opening on the clear sight tube where the hose is clamped now? I'm looking for a more professional look to disabling this VRO system rather than using bolts and hose clamps.
Thanks,
Ron
 
Sorry Ron... I retired before that protective cap thinggy came into view. It doesn't matter when you plug the oil line... at the hood pan or at the VRO itself... just plug it. (Joe)
 
plug all oil orifices. and just pre-mix your fuel at 50 to 1.
take the oil tank of the boat.
when the petrol side of the fuel pump goes bad ,just go buy the old style fuel pump and all your problems will go away.

the VRO oil pump on the fuel side o the pump is an expensive gimmick just to keep the eco police happy.from new th enines came with yellow plugs attached to the fuel lines for when (not if) you decide to have reliability.
RNLI and military spec did NOT have the vro, that says it all.
.
 
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