they are made to break to save the oil pump & shaft. I think everyone has told you to clean the crank case out completly.. The oil pump must come apart & the shaft must be aloud to slide straight down far enough to install a new couple or a repaird coupler. If it's broke it's because I Ice in the crankcase or something is lodged in the pump.. With all that gunk some is lodged.. The pump sqreen should be checked also for a larger hole. When Cleaned out the crank case...
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