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<blockquote data-quote="thill" data-source="post: 503470" data-attributes="member: 4972">The lower the pitch, the higher the THRUST, but the lower the speed.&nbsp; The prop is a gear.&nbsp;&nbsp; The lower the pitch, the slower the speed per RPM, but the more pulling power it has.&nbsp; Think of low gear in your truck.&nbsp; You rev the engine, and it doesn&#039;t go fast, but it pulls hard, enough to pull up a tree stump.&nbsp;&nbsp; You can&#039;t do that in high gear.So in a boat, the lower the pitch of the prop, the more weight it will move, but at a slower speed.&nbsp; &nbsp; So if you lower the pitch of your prop to get in the proper RPM range, your idling speed will go down a little.Most props are variable pitch, so it may not be noticeable.&nbsp;&nbsp; If you look, props are usually curved.&nbsp; At the base of the blades, the pitch is rather steep, and then they tend to flatten out at the tips for the final pitch.&nbsp; &nbsp; This is a good all-around design, but again, you may not notice much difference at idle.</blockquote>

[QUOTE="thill, post: 503470, member: 4972"] The lower the pitch, the higher the THRUST, but the lower the speed. The prop is a gear. The lower the pitch, the slower the speed per RPM, but the more pulling power it has. Think of low gear in your truck. You rev the engine, and it doesn't go fast, but it pulls hard, enough to pull up a tree stump. You can't do that in high gear. So in a boat, the lower the pitch of the prop, the more weight it will move, but at a slower speed. So if you lower the pitch of your prop to get in the proper RPM range, your idling speed will go down a little. Most props are variable pitch, so it may not be noticeable. If you look, props are usually curved. At the base of the blades, the pitch is rather steep, and then they tend to flatten out at the tips for the final pitch. This is a good all-around design, but again, you may not notice much difference at idle. [/QUOTE]

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