In Reply to: 9n won't start think its the starter hi current switch posted by Dan Chisler on July 30, 2017 at 20:38:12:
Not meaning to discount what you wrote but...Generally the things that prevent the starter from turning the engine over are:
Battery not good, (bad cell)
corroded electrical connection(s),
bad starter or hung up bendix,
or seized engine.
When you tested the battery did you put load on it first?