Iowa Gator
New member
Can anyone tell me the difference in early 9.9/15 J/E crankshafts, apparently the cranks made for 1974 thru 1978 use p/n 0318676 which changes to 0336754, 9.9/15 cranks after that, till 1992, all superceed to 435707 could it be because those early models use a magneto flywheel or is the drive shaft different. Any help would be appreated.