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<blockquote data-quote="Allen" data-source="post: 175195" data-attributes="member: 389">At one point I had a 16 ft Smokercraft with a 75 horse Mariner on it.&nbsp; It did something in the upper 30s, but was a chine-walking SOB, especially at the tailrace when running up into the chutes.&nbsp; I ran a composite 4-blade on it until the river eventually claimed it, I don't think it knocked anything off of the top-end speed, but it did give the prop a really good hold on the water when turning while at full trim for speed. Three blade props tended to blow out a little more, granted...this is when I was a lot poorer and I was too cheap to buy SS props.&nbsp; Of course, SS props don't flex much at all compared to aluminum, and surely not nearly as much as a composite.All in all, I liked the composite 4-blade. Even though they are inexpensive, they aren't very durable if you find yourself in shallow water often.- - - Updated - - -note:&nbsp; the composite prop is extra insurance against damaging the lower unit in case of rock hits, etc.&nbsp; Just make sure you keep a spare prop in the boat with you.- - - Updated - - -p.s.&nbsp; Do you know your RPMs?&nbsp; Going down a couple of inches in pitch will boost the RPMS and probably slow your boat overall.I thought my composite prop was an easy spinner compared to either aluminum or SS.&nbsp; I'd probably want to try the same pitch you already have (13&quot;) before going down a full two inches.&nbsp; Again, at the price, I'd suggest buying two but would probably want to start with the 13&quot; if my RPMs were already in the zone.</blockquote>

[QUOTE="Allen, post: 175195, member: 389"] At one point I had a 16 ft Smokercraft with a 75 horse Mariner on it. It did something in the upper 30s, but was a chine-walking SOB, especially at the tailrace when running up into the chutes. I ran a composite 4-blade on it until the river eventually claimed it, I don't think it knocked anything off of the top-end speed, but it did give the prop a really good hold on the water when turning while at full trim for speed. Three blade props tended to blow out a little more, granted...this is when I was a lot poorer and I was too cheap to buy SS props. Of course, SS props don't flex much at all compared to aluminum, and surely not nearly as much as a composite. All in all, I liked the composite 4-blade. Even though they are inexpensive, they aren't very durable if you find yourself in shallow water often. [COLOR="silver"][SIZE=1]- - - Updated - - -[/SIZE][/COLOR] note: the composite prop is extra insurance against damaging the lower unit in case of rock hits, etc. Just make sure you keep a spare prop in the boat with you. [COLOR="silver"][SIZE=1]- - - Updated - - -[/SIZE][/COLOR] p.s. Do you know your RPMs? Going down a couple of inches in pitch will boost the RPMS and probably slow your boat overall. I thought my composite prop was an easy spinner compared to either aluminum or SS. I'd probably want to try the same pitch you already have (13") before going down a full two inches. Again, at the price, I'd suggest buying two but would probably want to start with the 13" if my RPMs were already in the zone. [/QUOTE]

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