Duckworth 30 Offshore XL with Twin Yamaha 300 HP – 99% Faster at 3500 RPM
Phil Speilgene and Jacob Watson of Yamaha and Greg Sharrow, CEO of Sharrow Marine, spent 2 days fishing and testing props with Tom Nelson and Joey Pyburn, hosts of The Outdoor Line. Listen to the podcast below to hear all about their adventures on the water and what Tom and Joey thought of the Sharrow MX-3!
“If you would have told me that I could bolt something onto my engines and save 20% on fuel while increasing the holeshot, of course, I would not have believed it. If you had told me that this same product would quiet the engine sound down to the point that I no longer had to shut the cabin door to reduce noise; I would not have believed that either. The proof is in my reduced GPH fuel burn, the savings at the pump, and the quiet conversations that are now the norm with the door open. Before Sharrow Propellers, discussing the concept of a 30’ x 9’ hull’s holeshot was not feasible. Well, my concept of reality has been forever “Sharrowed”.”— Tom Nelson, The Outdoor Line, 710 ESPN Seattle
This chart correlates Speed with RPM. Red represents the data of the traditional props and Sharrow data is in blue.This chart correlates Speed with RPM. Red represents the data of the traditional props and Sharrow data is in blue.
This chart correlates miles per gallon (MPG) achieved at each of the speeds indicated. To be read: At 30 MPH the Sharrow pops (Blue) went 1.23 miles per gallon, or 23% farther than with the standard props.
This chart correlates the range provided by both props designs at the indicated speed settings. The conventional prop gives slightly greater at speeds over 34 mph, generally.
This chart correlates the advance rate of the vessel in inches for each 360-revolution of the propeller, for each of the two props. The prop pitch – 17” for the SWS II and 16” for the Sharrow – are the theoretical distances they would travel in one revolution. To be read: At 3500 RPM, the SWS II prop (Red) advanced 6.5 inches for every 360- revolution, compared to the Sharrow prop (Blue) which advanced 13.0” – 99% farther.
Prop efficiency is calculated by comparing the actual advance rate of a propeller compared to its theoretical one. To be read: at 3500 RPM the Sharrow prop (Blue) actually moves forward 82% of the 16-inch pitch with each 360-degree revolution, while the standard prop (Red) moves ahead only 39% of its pitch. Therefore, the Sharrow prop is 110% more efficient at 3500 RPM.
The horizonal bars represent the time that it takes to go 100 miles at four different RPM settings, for both the conventional and the Sharrow props on the Duckworth 30.
To be read: it took the Duckworth 30 11.21 seconds to get on plane with the traditional props, and 9.76 seconds to get on plane with the Sharrow props.
Amazing day on the water product testing with Yamaha and Sharrow Marine! Take a close look at those props; the Sharrow loop design is quieter and more fuel efficient where we need it the most in our cruise rpm range. Oh and the fishing in Admiralty Inlet is solid too! Thanks to @joeypyburn for the great photo! @sharrowmarine #Duckworthboats #yamahaoutboards #3riversmarine #raymarine #SiriusXM #harbormarine #baysidemarine #cannondownriggers #berkleyfishing #fenwickrods #pennreels #gamakatsu #burnewiin #royrobinsonrv #gillfishing #portofeverett #rudnickmfg #raysbaits #lesschwabtires #seewhatsoutthere
Joey Pyburn and Greg Sharrow with the first catch of the day on Duckworth 30 Offshore XL
Sharrow MX-3 on Duckworth 30 Offshore XL
Greg Sharrow on Duckworth 30 Offshore XL with Tom Nelson and Joey Pyburn
Karl Sandstrom and Tom Nelson on Duckworth 30 Offshore XL with Sharrow MX-3 Propellers