Yanmar L70 pull start freezing up mid pull after Decom lever engages?

Not sure if this is the rite place to ask but I'm at my whitts end looking for an answer to my problem. I have a Yanmar L70V6-L pull start with a decompression lever. It's easy to pull with the Decom lever disengaged. Mid pull after the lever engages the motor freezes up almost spraining my wrist. Any answers out there would be greatly appreciated. Thanks
Anthony, March 2013


done
Try pulling around 7 times with lever off. Then switch lever on and with two hands pull. it should start right up.

FRANK, March 2018