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running high rpms on 150 4 stroke

going4it

By going4it
in Boats & Motors.

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h8go4s Rising Star

h8go4s

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Hook up a tach to it so you KNOW what's going on. If that's out of your area of expertise, find someone who can help you. Your prop hub may be slipping, or you may just be imagining a problem. Until you get it figured out, back off on the throttle so you don't damage your motor.

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Valv Grand Master

Valv

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With a 150hp I am pretty sure you have a tachometer already installed. What does it ready at WOT ?

If the motor increased rpms for sure, it can only be prop related. Whether is spun, bent or just worn out

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