i have an 82 l2 corn plus, this is my second season of ownership. last year the feeder beater slip clutch kept slipping so i replaced it and it worked great the rest of the year. just started using it this year and it slips way to easy. i am only running a 4 row head, 1st gear and i can't run the hydro wide open (only 3mph). i took off the drive chain and the feeder turns smooth. i played with the variable feed speed with no difference. clutch uses 4 springs, manual says to only use 4 but there is room for 8. Any ideas or should i get another clutch