Starter needed or just maintenance?

My guess just sittin here is maybe a bad/shorted/open field winding????? Are there any old fashioned starter n genny shops in your area???

John T

I'm not sure if these startes are permenant magnet type or have a field. If they have magnets, the magnets might need to be re-magnetized. Heat, shock can cause magnets to loose their magnetism, but It's quite unlikely.

To clean the comm, I normally chuck the armature in my drill presss (remove the table or swing it back), then use 1600grit sandpaper or whatever you desire and try to keep uniform pressure and a constant back and forth motion.

Hope you figure it out. The starter you describe seems weak. It should nearly come out of your hand when you hook the battery up to it.

Most brushed motors that loose power either have a magnet issue, or more then likley a brush-commutator issue. Altho a burnt winding is not unheard of, but should be noticeable if you disassemble it.. Be sure to note the location of any spacers or thrust washers on the commutator.

• Hobby farm

My dad works at a stone quarry and is the maintenance supervisor, head electrician. They had a 500hp rebuilt for their stone crusher and when they got it back and installed it, it would just sit there, draw about 400amps and blow the overload. They'd unhook the load and it would run fine. Dad called the shop, asked how far they turned the comm, turns out it was a quite a bit below spec. That shows when the comm is cut too small, you have not torque. This motor was out of the 40s, so a new armature wasnt availble. Turns out they had a brand new armature in a disply showing off the quarry. Slapped it in there and she's purring like a kitten now. =)