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  1. 08-06-2017, 07:07 AM #1
    steelroe
    steelroe is offline
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    4tec crankshaft coupler thread

    Can anyone tell me the size and pitch of the thread on the pto end of crank where the spline coupler threads on.
    I measured it and I think it is m27x2.5 but can anyone confirm for sure
    Thanks in advance
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  2. 01-21-2021, 02:13 AM #2
    Jlo84truck
    Jlo84truck is offline
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    Did you ever get this figured out? I’m building a mini jetboat and I have a 4 tech and would like to get a Yamaha pump hooked up to my 4 tec motor.
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  3. 01-21-2021, 04:43 AM #3
    steelroe
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    https://m.facebook.com/groups/225380...5214155805289/
    Yes got it sorted . Look in that link info should be there. If I remember correctly the seadoo crank has a non standard m27x2.5 thread
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