oil mixing
 

Is there any way to tell how much oil your VRO is sending the engine, and can you adjust in any way besides disconnecting altogether and mixing manually?
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not sure of you motor, but run your motor on premix and disconnect the the oil injection line and measure the amount coming out. on a merc 150 2.0 its

@1500 rpm with oil pump link arm attached = 6.8 cc +/- 10% in 3 minutes
@1500 rpm wiht oil pump link arm disconnected = 17 cc +/- 10% in 3 minutes

if you've got a jonrude, i'm sure they have similar specs and one of the omc guru's will chime it later.