after 10 years of experience with Yanmar saildrive SD50
(2800h working) I will say thank you for all the ideas, which comes out from this and other forums
in the internet
All this ideas influence me to create new solutions for a better performance of my technical equippment of my boat
My first solution was using standard industrial seals
instead of yanmar
originals. The second solution was using GL4 gear oil
instead of the expensive Quicksilver ÷l and perform right calibration when I maintain a slippery SD50 clutch
For my next SD50 clutch service
I create a special nut (2), a collar set (3-4) consisting of 0.1mm-0.2mm-0.25mm spring steel
and 0.5mm-1.0mm-1.5mm copper collar , and a spline tool(1), made from extra strong aluminium.
The nut is always reusable and fixed with two M4 stud screw. Using the stronges version of loctide for the M16 nut and the M4 studs are also recommended.
With the collar set (steel and copper) I adjust the free play of the clutch to 0.2mm. It works fine since 500h.
On my web page I have created a step by step repair
instruction for the SD50 clutch. Link: Reparaturbericht - Saildrive SD50 Kupplungs Refit - Hochseekatamaran Gerda Martha
The instruction is written in german. I'm working on a translation into english
. In the meantime you can choose google
My next target is to replace the copper collar with bearings.
You will hear more? Write me a PN.