ryanweber_20
New member
Without realizing it, I purchased a 1978 85 hp Chrysler outboard which has carbs from a 1991-1994 90 hp (carb models are WB-100 and should be WB-21). I am questioning the size of the jets. The main jet on the top carb is .076 and the other two are .074 while the 1978 carb should have had .072. All three idle jets are .036, although I don't believe the 1978 carbs had a separate idle jet. From my research, 1983-1984 85 hp motors had a .050 idle jet and 1984-1985 85 hp motors had a .054 idle jet. How much does the size of the jets effect the motor performance? Any advice on whether I can make this work or do I need to replace the jets? Currently, the motor starts good, but after it idles for a few minutes it floods and dies. The idle mixture screws are at 1-1/2 turns out from the closed position. I can increase the number of turns, but is that the best way to fix it long term?