Re: What could cause a Merc Lower unit to Grow?

[billw]

Sometimes the shift shaft lengths are different, too; so don’t overlook that…..Like Legendre says, there are splines cut at different lengths, depending on the year, as well as the overall length of the drive shaft, that may be different. Mecrurys are so fickle about swapping parts that I rarely even try. I remember when you couldn’t interchange big lower units because they moved the side stud location by only an eighth inch. Was that really necessary? Who knows. Not me.

Long live American manufacturing!