What you say makes perfect sense, and add in the cold to an engine that has sat for a couple months. This could be either the engine or the starter very easily, or both. I tried to start it the other day and used two batteries, one the regular installed and a second as a jump source. Both had a charge. I will take the starter out and see how it spins with no load. I have at least one other starter for a back up on another engine and will test that too. If both spin well, I will have to surrender and go into the engine again.
You never say you have a problem or what the problem is. I don't know if this is a 6V or a convert to 12V.
