could it be an old seawolf?
Buc at Florida rigging is a good sourse of info.
I have one, and its been good. it is a little underpowered
for our boat though. keep the brushes clean, and check the springs
in the brushes. if they go, bad contact. Also, could be a
ground wire to the solenoid that is partially corroded.
Rickf
s/v Calaloo