For my 115 HP Yamaha 4-stroke, 17 1/2 foot Larson
What prop should I get, What size and pitch, what manufactor ?
I had a 13 1/4 x 17 Yamaha Prop, the boats top speed was 38 MPH.
I put a 13 x 19 Michigan Match prop, and top speed dropped to 36 MPH,
What happened I should have increased speed but...
