All these graphs really show you is the range you should stay out of for most cost effective cruising. Dont buy a 5000$ prop within a narrow rpm window of better efficiency. Just stay out of that window and save 5k.
Do NOT trust companies that turn off comments on their promotional videos. I promise thats a huge huge red flag guys. They censor discourse because they know its 99 % hype. If the prop was similar cost itd be worth a small gain in a small RPM window. Ok so it gets on plane quicker but the fuel consumption is no better over all. Just in that narrow RPM window.
Great video Brother, I did the same thing, I traded the high output 3500 dually for a 2500 hemi. I was only towing 14,000 pounds at the time and thats well within the range of the hemi gas. One thing you didn't mention was maintenance. I purchase the 5-year package from the dealer. Cummins is $5,370 for a 5 year package the hemi 6.4 was a ONLY $1199. The Hemi is a 250K mile engine easy vs the diesel that supposed to last longer but as long as liberals in Sacramento California controls SMOG requirements, the diesel engines will continue to be problematic.
Thanks for watching! Yeah good point, maintenance cost on the diesel was getting ridiculous. Nothing pulls better than a turbo diesel but the emissions requirements and costs are making it less desirable for regular folks
I have a 1995 grady white adventure 20 ft carries 82 gallons of fuel a 200 hp Suzuki 2023 outboard motor how many gallons of fuel will it take to go from Key West to Fort Jefferson and back to Key West.
I mean, running 4k at 22 knots is massive for fuel economy, idk why everyone judges these at WOT and then determines they're no better. Everyone just glazes over that mid high speed efficiency bump without even mention, it's weird. They're horribly expensive tho. On small boats like this it's not worth it, but if you have something that takes up serious dock space then it's a worthy consideration, assuming they get it right the first time or will correct it later if they didn't. It is a very limited band of enhancement, but it is quite noticable.
With what they are charging for the props they should send out an engineer with each full set to zero in the boat so you can take advantage of its design.
I just put my new sharrow on. I'm saving 15% in fuel cost and it should pay for itself in 8 -9 years if I don't hit anything or sell the boat or lose it in the hurricane
I was hoping for better results from Sharrow in the MPG department and was really wishing a higher top end. Curious if they might do better on my trip Yamaha 450 on the 375 Grady Freedom. .95 at best cruise and 57mph top end. Good fair review. Subscribed.
Thank you for taking your time to let the world know about your experiences with this new prop, it is the first non sponsored video I have seen of a Sharrow prop. I am not a fanboy of Sharrow props because of their price. Even if their claims of 35% were true (I don’t believe they use real world numbers) It would take 20 years for me to recoup the cost in gas saved (I have twin outboards). That being said, your efficiency comparisons are way off. It is incorrect to compare MPGs at different speeds, which is what you are doing (in this case) when comparing MPGs at the same RPM. Since the MPGs are derived from speed and fuel burn, the only correct comparisons are “MPGs to fuel burn” or “MPGs to speed”. So comparing your 29.1 MPH Sharrow to your 29.2 MPH old prop comes out to 3.8% MPG increase with the Sharrow. I did a linear extrapolation (between27.6MPH& 24.3MPH) of your old prop for 26.9MPH and got 2.81GPH fuel burn, so the Sharrow prop has a 24% MPG increase at 26.9MPH. Since this is the best MPG (on plane) of the Sharrow, it is probably the best that it will be. This is way better than what you got, but it is also uses extrapolated fuel burn, not “real” fuel burn. This extrapolation is just a “best answer I can do with the data I have”, so to really compare the efficiencies of these props you need to get the data for the old prop at the same speeds of the Sharrow data you already have. Of course same day, same conditions would be best, but actual fuel burn at same speeds is best way to compare. As far as trim tabs are concerned, I would not be worried about them being the same position for each prop. I would run them where I already know I like them for the old props, and get my data for each 5mph change (or 2 or whatever you want) starting at 15. Then I would find out where I like the tabs with the Sharrow props and get the data for those. So same speed at same comfort level sounds like apples to apples for me. My opinion is that below 15 mph doesn’t matter to me because I don’t spend much time there, but when in really snotty conditions I do wind up going 15 to 20 to be more comfortable, but wind up burning way more gas. But when I am going 15 to 20 and trying not to fall completely of the plane, having the grunt to maintain that speed matters more than economy. I keep up with how much gas I burn and how many miles I go in a season (aren’t modern electronic great) and I have averaged about 1.5MPG every year for the last 6 years. I think at the end of the season with the new prop you will be able to give us a more comprehensive review of your fuel burn and everything else. I look forward to watching it.
Suggest you see FloridaBoatGuy's followup video which gives better results and explains the Sharrow input. Seems like the benefit here is not as good due to the particulars of this boat being short/deep. The data for other boats that Sharrow supported/advised videos give is much better and for commercial/charter operators, I'd dare say it's a major game changer. Certainly a product that needs to be ordered to suit your circumstances and preferences.
@DashirllParr411 please stfu you're not smart. The S on RPMs is the the S carried over from Revolution>s< Per Minute to maintain plurality. It's not Revolution Per Minute. Please get a life
