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Propeller size.

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  • Propeller size.

    I've got a speedboat 'scorpion' 18ft long. The outboard I've bought with this boat is Yamaha 140.two stroke. Serial no:140 BET
    6F3/L/521045
    Made in Japan
    The problem I've got is that even when this boat has aboard 8 people, the engine raffs 6.
    I feel that the propeller may be changed, the one I have right now is 21'inch.Iwas told of changing it to racing or laser. What is the
    difference between them,what size& what kit should I have together with the propeller?

    Many thanks in advance for any info
    Nikis
    My email is suzammit@ifnetworks.net
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