The TN28 has two drive shafts, an upper one and a lower one. The spring for the upper drive shaft sits on top of a collar (part number 303031). The collar needs to positioned on the drive shaft so that the upper face of the collar is 2-5/8 inches from the top of the drive shaft. The spring part number is 303357. It can be obtained thru Sea Way Marine in the Seattle WA area. Phone # is 425-412-4006.
Bob Elden; Portland, OR