Re: Unburned fuel

[r-c]

OMC came out in 1970 or 71 with a crankcase recycle system across the line. They simply took the puddling of fuel (at idle) in the bottom of the crankcase and routed it back to the intake covers to be re-burned. The 40hp (built like a 50’s "Big Twin") did this. It had to help as my 58 35hp makes more of a rain bow than the 73 40hp I use on my user boat.