As with all brands, they have had their issues over the years, but Crestliner has responded by improving their designs and practices when problems arise. I would like to better understand the phenomenon of porpoising in smallish (18’ – 24’) planning hulls. Re: How to get my boat to stop porpoising... Porpoising occurs when the bow rises (for whatever reason), but runs out of lift. Re: what causes a boat to porpoise Basically two root causes for porpoising.....motor trimmed out too far, or the hull has a hook in it. We had 7 up in the bow area seated, one opposite me at … Porpoising begins as you motor picks up speed and raises your boat's hull from the water, reducing the amount of hull in the water -- which means there's too little hull in the water to support the boat. Bimini top shade when pontoon boating? Trim back down in small increments until the maximum speed and rpm are reached. Too much aft weight is common on tin-can console boats and exacerbates the problem. The use of a hydrofoil will help eliminate this condition as it forces the bow down at all times. Well I've had 4 boats and still learned some from replies to my questions on this site. Post Mar 15, 2020 #20 2020-03-15T20:53. What we did was put some wedges on the bottom where the transom meets the bottom and that will force the front end down. Contributing Member. Slow your boat down. The other benefit of a hydrofoil is the gas savings it can provide. 69 33 1. If you run your band across the bottom of most glass bassboats there is what they call a hook manufactured in to the glass. The special feature about the Pontoon boat is its lightweight because of the presence of hollow tubes. Boat has a 14 person capacity and we were under the weight capacity I believe. 69 33 1. SteveFL. Outboard boat engine stabilizer plates or boat planing fins eliminate visibility hazards during acceleration, porpoising, improves performance, and eliminates cavitation. Speed also plays into the equation. Crestliner boats are wildly popular in the freshwater world. This is the boat’s most efficient trim position for running top speed. Mounting height - cav plate anywhere from even with hull bottom to about 2" -3" above. Try starting with the tilt pin in the lowest hole (motor will be trimmed all the way in). I had 11 on-board heading to a fireworks show on our lake. Secondary issues are running the motor too low. These anti-drag stabilizers are mounted under anti-cavitation plate of outboard motors and inboard motors. SteveFL. They are unique in that they have a welded aluminum hull as opposed to rivets. Pontoon boat is the special type of boat having the large flat bottom. We had an unnerving experience this evening when taking a group out on our pontoon. It them falls back down and repeats the process. Porpoising is a pain in the arse, and not easy to troubleshoot or eliminate. Out on the pontoon boat with daughter Destyn who turned 28. The streamline shape and its light weight make it easy to use it on the surface of the water. My understanding is that porpoising is the result of a boat’s COG being too far aft and/or the wetted surface not being large enough to support the weight of the boat on plane. Even a boat with a hook in the hull will run smooth if you run her slow enough or don't have too much HP on the back. The boat may also begin to hop or pound in a rhythmic pattern known as porpoising. Outboard Boat Engine Stabilizer Plate or Planing Fin. Porpoising is a condition in which a boat will "bounce" while underway. I had the same problem with a tin boat I had. Trim the motor down until the boat stops bouncing. Porpoising - in some cases, trim tabs the best and final solution, plus you get the added benefits of controling how your boat …

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