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  1. J

    Prop, How many blades.

    Hi guys. <br /><br />I got a 19 foot aluminum crestliner with a 150 yamaha. <br /><br />It does about 55mph and the engine is sitting just around the red line but not in it. <br /><br />This is with a 3 blade prop stock from yamaha. <br /><br />I was wondering what a 5 blade with the same pitch...
  2. J

    Johnson 15 (Want to make power)

    Hi guys.<br /><br />I got a 89 johnson 15 that i dont use anymore. I want to play around with it and make some more power. My goal is about 30hp. <br /><br />Can i shave the heads (How much) <br /><br />Can I port and polish<br /><br />Bore the carb<br /><br />Rejet <br /><br />If anyone...
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