Re: 94 Johnson V4 90 horse VRO working?
The VRO appears to be connection, just went an looked. Harness is connected, etc. What can I do to check, electical stuff, relays, fuses, etc. I'm very good with electrical testing. Just need to know what to check, is there a relay or such that could cause the pump not to turn on, or is access to the jump easy to check for voltage?
Starting point:
http://continuouswave.com/whaler/reference/VRO.html
As you can see, the pump is purely mechanical. The electrical connections are for the warnings, not the pump operation.
The following will take you about 15-30 minutes:
Unscrew and pull pickup from tank. Make sure it has a filter on it. Make sure there's no obvious blockages. Check the float switch to make sure it is working freely. Re-install, making sure gasket seals.
Use a turkey baster and pull a few ounces of oil from the lowest part of the bottom of the tank. Squirt into a clear container and look for any signs of water or contamination. If you see it, completely drain the tank, clean it and replace with fresh oil.
Trace OIL LINE from oil tank all the way to VRO/OMS pump on engine. Make sure all connections are air tight, preferably with ratchet type hose clamps rather than nylon tie wraps or metal hose clamps. Make sure there's no kinks or air leaks.
Trace the ELECTRIC CABLE from the oil tank to the connection inside the engine compartment. Make sure the connection is clean and solid. This is the "low oil" alarm triggered by the float switch inside the tank.
Look for the wiring harness that comes from the pump itself - probably a 4 wire cable with a rubber connection. Make sure the connection is solid and that the terminals inside are clean. This is the "no oil" warning system triggered by the sensor inside the pump iteslf (described in the above referenced article).
Back to the oil line. You need to prime it or it won't work: There should be a little clear/whitish plastic part in the oil line right near where it connects to the VRO/OMS pump. Disconnect the oil hose just "down stream" (towards the tank) from there. Pump the oil line primer bulb until all air is expelled from the line and pump out several ounces of oil (into a container of course) to make sure there's no air in the line. Reconnect, clamp well, and give the bulb another couple of pumps at least until that clear plastic part shows it's full of oil.
Re-check the mark on your oil tank, run the engine and see if it's taking oil at 50-60:1. Measure oil and gas carefully before and after so you're confident in your measurements. I recommend that you run at least 5 or 6, preferably 10 or 12 gallons so that the measurements aren't quite so critical as if you were trying to do it after having burned only a gallon or two. Continue to run pre-mix until you know it's working.
Get yourself an owner's manual, all this stuff is described in there. Also get an OEM, service manual if you want to get into it more than that.