The VRO is not adjusteable on these engines. I reccomend the PENNSOIL synthetic blend for any of the old school carbed 2 strokes. Its priced right, available in many places, and burns relatively clean. As for how much oil it is injecting, have you checked how much oil to how much fuel you are using? If the VRO is working, it shouldn't smoke much at all at idle. Sounds like you have an air leak in the fuel line going to the engine from your description of the smoking. Remember that ifyou are running it hard, it should use roughly one gallon of oil to 50 gallons of fuel. And if you are running it at idle to slow trolling it should be closer to one gallon of oil to 90-100 gallons of gas.
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2011 SUNDANCE B20CCR SKIFF, 2011 YAMAHA 90HP 4 STROKE, 2011 KARAVAN SINGLE AXLE ALUMINUM TRAILER, LOWRANCE ELITE-7 HDI, MINN KOTA RIPTIDE TROLLING MOTOR
2000CC HYDRA-SPORT 225+HP EVINRUDE SOLD 
AND THE PINK JEEP!!!! R.I.P.
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