mattmak wrote:
Would other (non-factory) ratios be legal for racing? I kinda want to try 1.93 in an OMC 2Cyl...
Running 1.93 in the OMC would take away the punch out of the corners which is one of their advantages. I don't think the OMC nitro case is a good as the small 55 hp Yamaha. so far the twin yamaha has not shown 7000 plus rpm like the OMC or run over 60 mph. We do know the yamaha lower unit has worked well with thru hub Mercury props.....even 11.5 and 11 diameter....now would a 1.93 OMC work just as well with the same Mercury props??......one thing we do know is the smaller thru hub Mercury props are much easier to drive on the race course.....Matt if you do try it...I will loan you a mercury thru hub prop to try......it was said to be a 22 -23 pitch but when Thom worked on it... it was a 18-19.....good prop but too small for the 56'r.....and too large for the Toaster.
NOW MAYBE ONE OF THESE HEADS WOULD HELP THE TWIN YAMAHA?
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