Re: 86 VRO 50 Electric Primer Fuse
What OBJ is leading up to, and I will say it too, you did not have a VRO (oiler) failure if only 1 cylinder was damaged. If the VRO quit sending oil to the carbs, both cylinders would be scored, both pistons, rod, and the crankshaft would be ruined and every bearing would be a blue or a straw colored. Chances are the one cylinder was damaged by lean running, detonation, or a hot spot.<br /><br />If you disconnect the purple/white wire at the primer solenoid, does the fuse still blow when you push the key in? If not, you have a shorted primer. If the fuse still blows, you have to trace the wire to find out where it is shorted to ground. Make sure it is not contacting another terminal behind the key switch.
<br /><br />Now...if you've run 18 gal. of fuel through the engine and the oil reservoir has not dropped, there is a problem with the pump. You should recheck to make sure the pump is primed. You should do this by disconnecting the oil line from the pan and pumping the oil primer bulb until all air is removed from the oil line to the motor. Reconnect to pan. Squeeze oil primer bulb and watch the little oil flow tube to make sure it fills when the bulb is squeezed.<br /><br />Also check the VRO motor connection to the block. Make sure the pulse limiters blue end is pointing toward the motor. Did you check the limiter is not plugged with carbon or anything that would hinder the operation of the limiter?<br /><br />Make sure you don't have any kinked oil lines to the pump.<br /><br />If all this is good, chances are the pump has gone south. Then you would have the option of continued premixing or to put a new pump on.
