Last season I got a starter issue (he did not want to turn off), after disassembly it turned out that the starter is full of motor oil and the commutator(?) is in a deplorable condition. I bought a brand new replacement (WAI 19876N). Today I mounted everything to the pile but there is a problem, I do not want to spin and when I do it he did slowly only half turn and then it stands. I connected the car battery to exclude weak battery, but no effect. I can spin the wheel in 6th gear, so I do not block the shaft. Any suggestions?