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Apr 10, 2013 · matt1840 Discussion starter. 923 posts · Joined 2008. #1 · Mar 24, 2013 (Edited) Ive got a 22' scarab with a 23p quicksilver laser II stainless prop equipped with vent holes.. This is a big heavy boat an trying to get on plane is a joke unless i really baby the throttle. Once on plane its all good. I top out at 68 mph at 4500 an that cool ...
Apr 1, 2013 · Re: 4 Blade prop or a 3 blade prop on a 14' jon boat.... To answer the part about the hydro foil being good or bad.I have a 25 hp Merc on a Grumman 14 footer and I could never get the boat trimmed enough to plane with just me in it.I added a whale tail stabilizer plate and the boat will jump on plane immediately with one or three people on board.Top speed is 30-33.
Jul 31, 2008 · May 20, 2007. Messages. 2,323. Aug 1, 2008. #3. Re: Plugs in Mercury Prop. The plugs are designed to allow some of the exhaust bubbles to flow along the cutting edges of the prop. This allows the prop to slip slightly during hole shots allowing the rpm's to get up into the power band quicker. B.
Jan 30, 2019 · Choose a range of propellers to perform a water test. Test the props under the same conditions that you would typically use the boat—same load, gear, and water. Set the trim angle so the boat has optimum speed on top of the water. To test the prop, run the boat at WOT and observe the maximum engine RPM on a tachometer.
For example, your boat may be sitting between a boat leaking DC current and the best ground for that current. Rather than the DC current moving through the water to ground, your boat could provide a path of lower resistance. The DC current could enter a thru-hull fitting, travel through the bonding system, and leave via your drive to the ground.
The Correct Prop Pitch. Because there’s always a tradeoff between acceleration and top speed, finding the correct propeller pitch will depend on how the boat is used. A typical bass boat used for fishing may have a prop pitch of 25 inches, while a bowrider used for waterskiing and wakeboarding may be better off with a 17- to 19-inch prop pitch.
Any discrepancy between the manufacturer’s RPM range and the actual RPM the motor is running at can be corrected by choosing a propeller with a different pitch. Adjusting the pitch by 1 inch adjusts the motor’s WOT RPM by 150-200 RPM. If the motor’s RPM is at the top end of or above the manufacturer’s RPM range, the boat is under-propped.
