Originally posted by Mange
Have you changed fuel? it could be as simple as that, poor pure methanol (no oil) inte the magnapull and try to pull it. The oneway bearing in the magnapull doesnt work with some fuels.
Thats the first time I have ever heard of this. I didnt think the fuel could even get near the pullstarter (the plate should be sealed????).
It most probably is the one-way bearing if it is locking and turning the shaft back. Hard to say whether it is just some dirt or whether the bearing is blown. What I do know is that its nearly as cheap to purchase a new pullstarter than replace just the bearing.