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Which prop for 40 hp Mariner? Updated: Pitch and Dia ?
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<blockquote data-quote="Quackrstackr" data-source="post: 147435" data-attributes="member: 437"><p>I can't see youtube behind the work firewall but unless that guy is filming his setup along with a realtime gps reading, that's a hard one for me to believe.</p><p></p><p>I have a buddy with a bare bones 16' WE and 2/yo Yamaha 40 that wouldn't hit 40mph if his life depended on it.</p><p></p><p>Regardless, 2" of pitch isn't going to give you 11 mph.</p><p></p><p>Prop diameter doesn't have a lot to do with speed increase or decrease. Increased diameter will give you additional stern lift and better bite (most likely the main reason you aren't slipping the prop in turns anymore).</p><p></p><p>Different prop styles by different manufacturers are probably going to behave completely different because of differing blade geometry. It's hard to judge the performance of a different brand just by looking at pitch and diameter numbers compared to what you already have. But, solely speaking of top speed, they shouldn't be that much different given equivalent dimensions.</p></blockquote><p></p>
[QUOTE="Quackrstackr, post: 147435, member: 437"] I can't see youtube behind the work firewall but unless that guy is filming his setup along with a realtime gps reading, that's a hard one for me to believe. I have a buddy with a bare bones 16' WE and 2/yo Yamaha 40 that wouldn't hit 40mph if his life depended on it. Regardless, 2" of pitch isn't going to give you 11 mph. Prop diameter doesn't have a lot to do with speed increase or decrease. Increased diameter will give you additional stern lift and better bite (most likely the main reason you aren't slipping the prop in turns anymore). Different prop styles by different manufacturers are probably going to behave completely different because of differing blade geometry. It's hard to judge the performance of a different brand just by looking at pitch and diameter numbers compared to what you already have. But, solely speaking of top speed, they shouldn't be that much different given equivalent dimensions. [/QUOTE]
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Boat House
Which prop for 40 hp Mariner? Updated: Pitch and Dia ?
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