Sharrow Prop Manufacturing

[Midnightsun]

I guess most here have heard of the Sharrow prop, If not here is an introduction or just google Sharrow prop https://boattest.com/Sharrow-Propeller

Heres the cool part. How they make them.

https://www.youtube.com/watch?v=xfA-gzqhkXw

[Cooler]

I have read a lot of test results via Boattest. These props appear to increase prop efficiencies in almost unbelievable amounts. They do not make inboard props yet, just OB and I/O versions. Pricey but will pay for themselves with better fuel, better speed and better handling. Hope they continue their development. er

[Midnightsun]

Hopefully this new manufacturing process may reduce the price considerably.

[pepmyster]

These are beautiful. First heard of these through Clarks Boaters, Marina. Very efficient for sure. New thinking, hope it goes further, even if it's for future generation of boaters. Nice to see someone thinking out of the box....The building, machining process is just amazing!!!!!!

[RGrew176]

I would be tempted to put one on my new boat but the price will have to come down first. Yamaha has an agreement to manufacture them for Yamaha engines. My new boat comes with a Yamaha 115. Right now they only make them for 150 HP and up.

[RGrew176]

More test results.

https://boattest.com/article/sharrow-pr ... e=hs_email

[km1125]

Cool idea and love that video.

However, keep in mind they've never really been independently tested against a variety of props. You might get the exact same improvements just by going with a higher quality prop, or one that's just better matched to your application. In all the tests I've seen so far, they don't get the best prop for the application and then compare it with a Sharrow, they just replace the stock one with a hand-selected Sharrow and then run the test.

Be a bit diligent and you could save thousands in the process.

[Midnightsun]

In all the tests I've seen so far, they don't get the best prop for the application and then compare it with a Sharrow, they just replace the stock one with a hand-selected Sharrow and then run the test.

In the last link posted by Rick they test a small Bayliner with stock prop and then a prop widely used by many as it helps performance so yes there is at least this test with a better prop being used. The Sharrow still puts it to shame. Jump to 2:25 on the video. The results are pretty amazing considering it got up to over double the fuel economy at planing speeds which would cut your fuel bills by over half.

[bud37]

This prop tech is quite interesting, maybe an industry new day.

Considering they say there is a 50% drop in fuel use,...... well that would indicate to me that the engine is applying far less horsepower at the same prop speed which on the surface seems hard to swallow. I wonder if that is the reason they do not use this tech for smaller HP engines....diminishing returns vs cost based on the applied hp limits of the engine.

As with all engines, applied HP equals fuel usage, just basic science, easily calculable....it is the same weight boat being propelled thru the water with the same thrust applied it seems.......may well be, I don't know.......nevertheless interesting.

[Midnightsun]

There are other videos showing the drop in noise which is also considerable. Really amazing improvements all around except for the price. I don't see anything from test done on larger flybridge boats like many have here. Looks like most of the gains are on smaller boats with stern drives or outboards.