Consistently mixed gasoline oil will make for less tinkering with high and low speed needles to obtain best performance. A leaner mix may allow for less fouling when doing a lot of slow running. The other extreme running wide open for long periods calls for even more oil than standard fuel mix ratio.

Anyone contemplating work on a recoil starter either to renew rope or replace
a part would be well advised to read the factory manual instructions and follow
the instructions carefully both when taking apart and putting it back together
Getting it right means doing it right....little things about how many turns to
wind up spring to preload starter tension can make or break job.
I have reviewed the manual instructions for this Chrysler(West Bend) Wizard and I have replace gear and rope on a similar vintage Evinrude. Reading and following instruction made it an easy job...Doing it right the first time is lots easier
on both blood pressure and vocabulary.
Louis