iTrim automatically adjusts the trim of the engine for you. You use the trim for the best way to operate the boat. The stringers and bulkheads may look slightly different but the procedure is always the same. Latest. The best-known manufacturer of hydraulic systems is Bennett Marine and the company now has an electric line as well. Manual versus Power. Hi, I have just bought a boat and I have been searching for a way to explain proper trimming of a boat and how to start it. Reach to the back of the engine housing to the back transom -- the very back edge of the boat. The propeller and prop shaft is … The steps are as follow: 1.Build the engine girders 2.Locate the axis of the prop shaft a so called 600 dollar fix turned into 300! However, with the outboards in the back of the boat, that allows lots of creative use of deck and storage space where the inboards would have been. Smaller boats with outboard motors will have a manual trim control. The broad range of Volvo Penta inboard diesel engines means that you can always find an engine that fits the size of the boat. This creates problems with hull pounding, also known as porpoising, and visibility forward. How to Manually Raise an Inboard Outboard Motor Turn the engine off. Shifting the weight in the boat aft, trimming the boat up, and driving the boat so that it stays running or sitting on the back of a wave (instead of running down it) will all help. Use trim tabs to trim the hull of the boat — both up and down and from side to side. A boat handles best when it’s running parallel with its at-rest waterline. And when you trim down the boat will pull to the right. Boat Buyers Beware: 10 Hidden Problems to Look For in Used Boats. Back the boat trailer into the water and clip the hook of the wench to the clip hook on the front of the boat hull. Larger boats will likely have a power tilt option. This is one of the more important things to understand about tilt and trim. There are some traits in any boat that will affect trim. Lenco Marine offers electric trim tabs in a system that consists of two electric motors, one inside each of two independently operating rams powering screw jacks that move the tabs up and down, also controlled by switches at the helm. Stand at the back of the boat and have an assistant stand to the other side. Why You Want 3 Batteries! Manipulating the trim can improve top speed, efficiency and overall ride. The trim system only brings the drive up a little ways and is used when driving the boat. Copying or re-using any of the material, in whole or in part, on this site, including data, photos, articles and videos is strictly forbidden without the written permission of BoatTEST.com, LLC. A large center console uses the trim-ability of the outboard motors and trim tabs to achieve a stable ride. Porpoising, or the bow bobbing up and dow, is caused by over-trimming at cruising speed; there’s no longer enough hull in the water to support the weight of the boat. Push the lock pins you unscrewed from the motor through the trim settings in the cowling area. With outboards you tilt the motors to give clearance when towing on a trailer but you can't tilt the prop of an inboard so the trailer may have to be raised to provide the clearance. Advantage: Whether you have been boating for 40 years or 4 minutes, iTrim provides you with an effortless boating experience. Not All Boats Porpoise Equally. You may get on plane eventually, but you are wasting fuel and putting undue stress on the engine. Bennett Marine claims that some boaters have saved as much as 30% by adding its trim tabs. A properly trimmed boat offers the most comfortable ride and the most efficient running angle â one that minimizes the amount of hull in the water creating drag â and maximizes your mileage.Trimming the angle of the engine's thrust too far down (drive in) will force the stern up … Read Next: Understanding a Boat's Propeller Pitch. Experience: 40 yrs. How To. A boat burns fuel more efficiently when it’s on plane and trim tabs can help a vessel maintain plane at a lower rpm. These are less common on lake boats because they are mainly used in offshore boats. Trim Angle Depends on Boat Speed and Water and Weather Conditions. Here’s how it works... Just remember that the boat’s bow will move in the same direction you press the trim button—button up is bow up, button down is bow down. The ability to tilt and trim your engine improves boat performance under a wide variety of conditions from smoothing out a rough ride in heavy seas to reducing draft in shallower waters. The appropriate trim varies depending on the boat’s hull design, size and weight. This is the boat’s most efficient trim position for running top speed.