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Jul 21, 2005 · 3 blade prop or 4 blade prop? Boat is a new 2004 Moomba Outback LS. It's been sold to me with a 3 blade prop on it but the listing says 4 blade prop so I can get the 4 blade if it's better for wakeboarding.
May 31, 2013 · Re: 4.3 Mercruiser New Wakeboarding Prop It is generally suggested to reduce an inch of pitch when switching from 3 to 4 blade in order to maintain rpm. But since you are slightly over on rpm, I would suggest you stick with a 17 pitch for the 4 blade. As far as aluminum versus SS; perhaps this example might provide some insight.
Aug 28, 2015 · A lot of boat owners have a common misconception that 4 blade propellers deliver increased performance and are more efficient than 3 blade propellers. There are quite a few older forum posts and other guides that claim 4 blade props are needed when wakeboarding behind a ski boat or older model v-drive with a 1:1 gear ratio.
Compared to 3 blades, 4-blade boat props provide better "hole shot" performance with less steering torque and less vibration at high speeds. When switching from 3 to 4-blades, generally a 1" pitch decrease is required. So, a 21" pitch 3-blade is replaced with a 20" pitch 4-blade. Pitch is increased when switching from 4 to 3-blades.
Apr 26, 2020 · 3-Blade vs 4-Blade Propellers One of the most common questions we're asked is what is the difference between a 3 blade and 4 blade propeller, and which one is right for me. Outside of the specific diameter, pitch and cup of a propeller, this is definitely the most common question, and the first one that we're asked as customers begin the prop ...
We are currently considering a 4 blade replacement instead of repairing the 3 blade prop. We have seen two different recommendations for the usage (wakeboarding, skiing, tubing, kneeboarding, and a possible parasail) of this boat when using a 4 blade prop. The first is a 13x13 LH and the second is a 13x14 LH prop. There doesn't seem to be
Choosing a Boat Prop for Wakeboarding. The right boat prop could boost performance. May 3, 2016. ... Most of today’s wake boats have a 1.5-to-1 gear ratio, which enables you to take advantage of a four-blade prop’s increased surface area. Boats with a 1-to-1 ratio are often better off using a three-blade prop. ADVERTISEMENT / ADVERTISE WITH US.
The grip of a four-blade allows a bay-boat captain to maximize the height at which he can run the outboard, and cross flats that might not be navigable with a three-blade prop. Whether three- or four-blade, most saltwater propellers for outboard engines over 150 hp are investment-cast from strong, durable, corrosion-resistant stainless alloys.
Apr 29, 2019 · Simply stated, a 4-blade prop of equal diameter, blade geometry, and blade surface to a 3-blade prop has 33% more total blade area. All other things being equal, more blade area means more thrust. More thrust means more pulling power. That increased thrust and pulling power of a 4-blade prop gives a sportboat a faster and more powerful hole shot.
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