Re: ?johnson 6hp wont start been sitting for 1 yr. 1970s?
Welcome to Iboats
I hope you ment 50:1 mix there! Check spark - should jump 3/8" gap. If that doesn't work, make up some 50:1 mix in a spray bottle like a windex bottle, spray it down the carb's throat and see if it won't start on that.
This will answer the question, is it fuel or spark?
There were many different ignition systems in the 70s. Check the port transom bracket for a nameplate with a model number, or failing that perhaps the silver convex plug pressed into the engine block near the spark plug end.