2 stroke 90 hp yamaha prop question

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xxsckarterxx

Cadet
Joined
Jan 29, 2010
Messages
6
I have a 17 foot skeeter with a 2 stroke 90 yamaha on it and I'm turning close to 6000 rpms running 43 mph. The prop is a 13x17 oem prop. If I put a 13x21 on it will my rpms go down and pickup speed. The manual says the power range is no more the 5500 rpms.
 
MH Hawker

MH Hawker

Vice Admiral
Joined
Jul 13, 2011
Messages
5,516
Re: 2 stroke 90 hp yamaha prop question

In any event you need to lower the max RPM`s just to keep from frying your motor.
 
jestor68

jestor68

Commander
Joined
Jun 12, 2012
Messages
2,308
Re: 2 stroke 90 hp yamaha prop question

Expect 150-200 rpm change per inch of pitch change.
 
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