50 : 1 is the correct fuel mixture
A 1975 Chrysler 30hp outboard requires a 50:1 fuel to two cycle oil mix.
50:1
All Chrysler motors built after 1969 use a 50:1 mixture
Chrysler outboards produced after 1966 require a 50:1 fuel to oil mix.
The 1975 model, 70 hp Chrysler requires a 50:1 ratio. This is 3 oz. of 2 cycle oil, to each gallon of fuel.
50:1 they say i got the same engine as you. 50:1 does the trick.
Your motor is made by Chrysler, Model# VWB52119b is a 15hp, 1981-2
50;1
50:1
50 to 1
50:1