Fairly new Johnson 150, smokes a little much at start-up and idle, I'm no mechanic but I've had lots of OMC outboards over the years and never seen one smoke like this, runs a little rough at idle too. Is there an adjustment on the VRO Oil injection? I've done the caluculations for oil consumption based on 50:1 and compared it to the amount fuel I'm using, it apprears I'm using about twice as much oil as I should, assuming a constant 50:1.<br /><br />Any thoughts?