Re: Mercury 9.8 drive shaft issues

[20mercman]

I have seen worn splines on the 200’s, but not on the 110’s. The drive shaft should be interchangeable for this motor from a lot of motors from 6hp, 7.5 and 9.8hp. On the 200 I had, I had to turn the crank against rotation of the lower unit to get the thing to let go, it was like a twist lock. The splines in the crank were fine, so it must have been a poor heat treating issue. This was on a 1969 motor, and I have also seen wear on the stainless shafts as they are softer then the carbon steel shafts. Don’t condemn a motor for just a drive shaft, as they are around.

Steve