Originally posted by TravisFling
However, I think TRBenj might be correct that neither 422 or 470 are correct for his boat. Is the difference the 1:1 vs 1.23:1 transmission. Probably so. Was 89 the first year of the 1.23? That's what the skidim site suggest..."Ski Nautique Thru 1988 with 1:1 trans."
Anywho....not sure what prop is correct....but current specs are listed here.
http://www.acmemarine.com/prop-list_ski-boat.php
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