The later model V-6's all had the 1.86:1 gear ratio, but prior to about 01 or so in the 150's they offered a few different ratios for the bass boat guys in the 150 20" shaft. It could be a 2.17:1?(or somewhere along that ratio) I believe which would give you a big jump in RPM's.
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2011 SUNDANCE B20CCR SKIFF, 2011 YAMAHA 90HP 4 STROKE, 2011 KARAVAN SINGLE AXLE ALUMINUM TRAILER, LOWRANCE ELITE-7 HDI, MINN KOTA RIPTIDE TROLLING MOTOR
2000CC HYDRA-SPORT 225+HP EVINRUDE SOLD 
AND THE PINK JEEP!!!! R.I.P.
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