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Tohatsu 50 lower leg- compatibility between models.

Mattinoz

New member
I just discovered I have a damaged lower leg (twisted shaft) on my 2002 tldi 50 MD50A. I have access to a lower leg from a 2006 model (I think md50B). From the limited resources I could find, the part numbers are slightly different (may account for the different paint colour). Has anyone had experience interchanging for the newer model, providing I match the leg shaft length?

I absolutely love this motor and I hope to keep her alive for a while yet.... I’m in remote Australia so parts/dealers are a bit light on.
 
3C8643010 is the original short shaft for the MD50A. (...20 for long, ...30 for ultra long ...40 for LL).
The same 3C8643010M is used in the B models.
 
3C8643010 is the original short shaft for the MD50A. (...20 for long, ...30 for ultra long ...40 for LL).
The same 3C8643010M is used in the B models.

Thanks for your reply.
Do you think an entire gear case (lower assembly including shaft) from the md50 will bolt on to my md50[a].... both with 20” shafts?
 
The complete LU for the MD50A is PN 3T5S873020 in Long.
The same unit for the MD50B is 3T5Q873025. The Q is the paint code, and the trailing 5 is the revision of the complete part. They will interchange.
 
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