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  Effective Diff Between 13/14 and 14/13 Prop on Montauk w OMC 90

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Author Topic:   Effective Diff Between 13/14 and 14/13 Prop on Montauk w OMC 90
Gene in NC posted 11-10-2003 08:32 PM ET (US)   Profile for Gene in NC   Send Email to Gene in NC  
What would be the effective difference between 13/14 and 14/13 prop on Montauk w OMC 90. Ran 13/14 on Sakonnet w '66 OMC 100 used a lot for skiing. It was great and would really pull em out of the hole. Also worked well for all apps including 100 m/day cruising.
Tom W Clark posted 11-10-2003 09:24 PM ET (US)     Profile for Tom W Clark  Send Email to Tom W Clark     
OK, I'll bite. What's a 13/14 and a 14/13 prop?
Lil Whaler Lover posted 11-10-2003 09:52 PM ET (US)     Profile for Lil Whaler Lover  Send Email to Lil Whaler Lover     
The 1966 100 horsepower OMC motor had a completely different lower unit than newer 90, different gear ratios, no through hub exhaust on the 1966 etc.. I assume 13/14 and 14/13 mean the diameter and pitch and the 14 pitch might have been right for the 1966 100 hp but you will need a 17 or 19 pitch for a newer 90 OMC.

If the 90 you refer to is also from the 1960's then this advice is worthless.

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