Originally Posted by boatmartinm

Mercedes OM615 with a pneumatic governor. Starting up from cold it's about 450 rpm then over about 10 minutes it climes to just over a thousand as the engine warms up and there it stays. I have tried disconnecting all the linkages and the adjusting screw is wound right out. Nothing i've tried brings the revs down. Im thinking its something to do with the governor but I don't want to mess around with it without knowing what i'm doing.



Martin