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VRO Oil Pump

"Frank,
That's a very ope

"Frank,
That's a very open ended question. Do you suspect a problem, for sure have a problem, or just want to make sure you are covered?

For a routine check, the easiest way is to fill the fuel tank and mark the level on the oil bottle. Go Boating. Once you come back, refill the fuel tank, and fill the oil tank back up to the mark noting how much of each you have to add. Depending on the model year, you should have used 50-60 times as much fuel as oil. That's a pint of oil for every 6 gallons of gas. If you're close to these numbers you should be in good shape.

There is a highly technical consumption test in the service manual. It involves marking off a piece of clear plastic hose in something like 1/2" increments. You then draw up a column of oil in the hose and connect it to the pump. It should draw the oil 1 increment for every 1 to 3 cycles of the VRO pump. This depends on the era of the pump, as well as the engine speed during the test. I wouldn't go to all this trouble unless you suspect a problem.

Dan"
 
there is more info and debates

there is more info and debates about keeping it or taking it out if you run a search.

i do know that if you suspect it to be faulty you should be mixing your gas 50:1 while running test to see if its pumping oil----if it is faulty at least you have lubrication.........if the pump is good it will just smoke a little more
 
"Since I'm obviousl a novi

"Since I'm obviousl a novice in the world of oil pumps, I tried to make it short.

The problem occurred because the guy I was taking fishing did not pump up the gas bulb. I couldn't start the engine so I called my service man who said he had to clean out a lot of oil. He told me the oil (VRO) pump was bad. I asked if the oil pump was active if the gas bulb had not been used. He said no. I don't understand how the oil pump would not work if the engine was cranking but not getting a gas supply, The engine starts ever since and seems to use the same amount of oil out of the tank as it always did. Ergo my quandry!! I don't mine spending the $400. plus but, just if I need to.
Thanx for your impute. I appreciate."
 
"The only way the VRO can add

"The only way the VRO can add too much oil is an insufficient fuel supply. If you run the fuel tank dry you get 50 parts air to one part oil every cycle of the pump. Since the carbs fuel demand isn't being satisfied, the pump cycles at a very rapid rate. This causes an excessive amount of oil to be pumped into the engine. The same thing can happen if there is an air leak in the fuel line. Anything that prevents the pump from drawing a full dose of fuel with absolutely no air will lead to excess oil consumption.

I suspect your pump is fine."
 
"Dcramer, thank you for taking

"Dcramer, thank you for taking the time to explain it to me. I certainly appreciate ."
 
"(The only way the VRO can

"(The only way the VRO can add too much oil is an insufficient fuel supply).
Unfortunately--this is not the case...a defective pump,oil OR fuel side,can over oil ,as well as A PRESSURIZED oil tank,..."
 
"Never seen a pressurized oil

"Never seen a pressurized oil tank.. I will concede the defective fuel side can act the same as an insufficent fuel supply. Can you explain how a problem with the oil side can add too much?

Thanks,
D"
 
"howdy---if the oil side is wo

"howdy---if the oil side is worn,and u have a pressurized oil tank,and it does'nt take much pressure,....oil is forced past worn parts,especially when eng is off,u will get a waaay overly rich mixture..the lil vent hole in oil cap,can get obstructed...solution,for a protected oil tank,is drilling a small hole in cap/and replacing vro/oms.we had 2 this past summer doing this exact thing."
 
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