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OMC...SST 45.....2018 REVISIONS
With less original replacement parts available, the spec rules were expanded to included other parts.
Here is the revised document:
https://www.apba.org/documents/56246555 ... ations.pdf
There are revisions to porting and a crank shaft modification.
T750 rules differ by allowing:
- ANY Tuner
- 160 compression maximum

YAMAHA.......60D....ORIGINAL SPEC SHEETS
Matt was able to get the original 60D spec sheet.
The 60D went thru several revisions over the first few years likely due to lack of original parts.
The spec sheets provide us with important information for our T750 class.
- the porting is EXACTLY the same as the stock 55 hp....as is the cylinder head
- the difference is a larger carburetor , much larger main jet, different reed stop and custom tuner.
THIS COULD? BE A GAME CHANGER FOR THE YAMAHA IN IMPROVING PERFORMANCE!!
It gives us the size of the tuner
T750 rules differ by allowing:
- ANY Tuner
- 160 compression maximum

Yamaha 3cyl 50hp (Pro50):

https://www.uim.sport/Homologation1.aspx

choose "Engine", choose "Yamaha", look for the "50H".