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Prop Size

Rosie1

.
Dec 5, 2017
2
Irwin 30 Guntersville, Al
I have a Irwin 30 1980 with a 2 blade 13x13 prop I want to go to a 3 blade has anyone ever done this is what size did you use
Rosie1
 

Dave Groshong

SBO Staff
Staff member
Jan 25, 2007
1,790
Catalina 22 Seattle
Typically you go down one number in pitch, so 13 x 12, but talk to a prop shop to be sure, they will want to know waterline length, displacement, transmission reduction number (should be a plaque on the trans), hull speed, engine HP
 

Rosie1

.
Dec 5, 2017
2
Irwin 30 Guntersville, Al
Thanks a million Dave This is my first sail boat so have a lot to learn
Rosie1