Vintage after market service manual indicates 48 to 1 for regular service
and 24 to 1 for severe service. This is for the West Bend/Chrysler 9.2 sold as 9hp Wizard model 6509.
Be aware that from 1957/58 to 1964 McCulloch/Scott made Wizard outboards
During this time frame McCulloch changed ratio from 3/8 pint per gallon to
100 to 1 on some later design motors. 100 to 1 ratio was something that
worked ok during manufacturere's testing but did not work well for customers.
