www.kencook.com is the official supplier of Gale literature. If you are looking for the service manual, it is over an inch thick and covers all models. Kind of an overkill for your little 3hp. We can answer your questions.
thank you for info. Boy it is alot of work finding info on old boat motors, glad to have alot of eyes and ears, that should do it. For my son who is in Iraq and wanted it repaired.
You might watch ebay I stumbled on a gale service manual covers all models 51-57 Wonderful pictures and line drawings also list of private label and Gale models 48-57.I think I paid $10 or $15.Lots of detail and specs but so far haven't seen any reference to fuel mixture.Kind of odd.