View Full Version : Alpha 1 Trim Cylinders (two sizes)??

09-24-2017, 04:13 PM
Who knew that Merc made two sizes of trim cylinders 15 9/16 and 16 3/16 for a A-1. I have been running a Alpha SS for some time and noticed drive could use more negative trim out of the hole.. Measured cylinder, was the longer one, 16 3/16. Question, what trim cylinder size did Merc use from the factory for the SS?

When I installed the shorter drive for the old A1, never entered my mind there were two sizes of cylinders. Searched the net but to no avail. Anybody?

09-24-2017, 06:50 PM
I wasn't aware of that either, but did you know SEI offers both
lengths for $120.00 each?


09-24-2017, 07:29 PM
Thanks for the search GC. Darn good price and will think about purchase. Do you think the SS is shorter width wise vs a Alpha1?

Also want to add 1988 18C.

09-24-2017, 08:22 PM
I believe I read it's the same.