VRO was never a good idea. this was even admitted by OMC themselves in a round about way by making engines at the same time without the vro,
it was the cause of thousands of engine failures due to lack of lubrication to the crankshaft journals, big ends small ends and often the rings and cylinder walls.
This was supposed to be rectified with the onset of VRO2.
The majority of outboard mechanics like the vro, and vro2 yes of course they do, that's a no brainer its kept them in business for years rebuilding the
engines that have broke due to the system not only breaking down, but not delivering enough oil to fuel to lubricate the main internals.
here is a photo of what vro can do, lack of oil destroyed all 3 cylinder walls due to pistons not getting any lubrication.
this was not an overheat due to lack of water cooling, it was not enough lubrication, the crankshaft is also toast as are all 3 con rods and pistons.
the oil tank was 3/4 full, the oil filter clean and clear,filter in the tank clean, oil pipes going to vro all clear with no obstructions and no air leaks.
Oil present in pipe leading to the VRO pump, but NO oil present in fuel at carburettors and not enough oil present inside the vro pump where it is
supposed to be mixed.
engine ran perfect 5 mins before this happened at 5,000rpm.
Result is one engine block with too much damage and was considered to be un-economical to repair .
