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Prop Size

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  • Prop Size

    Please can any one tell me what size the prop should be on a Yamaha/Mariner 30HP motor.

  • #2
    Depends on the size of the boat you are pushing .
    The engine should rev close to max revs ( 6-6500) at full throtle under load. If she over-revs you will need a bigger prop, if she cant rev out then a smaller prop is needed.

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