Bp, at the beginning of the year I had the oil injection pump bypassed. I now manually mix the oil and gas on my 99' 50hp Johnson motor. Ever since then I have noticed a oil slick creeping down the side of the motor. The oil looks like its already been burnt. Any idea on what the problem could be? I have been mixing it at a perfect 50-1 everytime. Am I adding to much oil? Will it cause a lot more problems if I scale back to 40-1? I have always been told Johnson motors should be at 50-1. Any feedback would be great. Thanks Andrew I have attached a picture of the motor for reference.