![]() ![]() twin stern drive setups are much less manuverable than twin inboards. Two reasons: Placement - stearn drives are farther from the center of the boat. ![]() ![]() operation in reverse - SDs are very inefficent in reverse (exhaust gas is. Its watertight integrity is determined by one or more rubber belows which prudence dictates should be replaced well before any possibility of failure. More of the routine maintenance items are below the waterline and can only be accessed during liftout.Ģ) The boat steers by turning the outdrive and so max steering angle is usually quite small - this doesn't matter at 30kts but certainly does at 8. Typically, inboard motors sit towards the middle of a boats hull however, boat owners mount their outboard motors on its transom, keeping the engine and drive. The pseudo rudder provided by the leg is quite small so steering while moving with the power off, while not absent, is further restricted. These factors combine to imply that most boats with OJ's qre quite "wandery" at displacement speed - that is they require constant attention to maintain a respectable course and larger steering inputs than you would expect to restore direction once lost.ġ) You have vectored thrust at the stern which means that steering at berthing speeds is much better than a single engined shaft boat (which usually uses prop-walk to achieve the same effect - less well and only in one direction). Indeed if you have a bow thruster a bit of practice will allow you to move a single engined OJ equipped boat more or less directly sideways with minimal fore and aft movementĢ) The ability to trim the leg means that you can get access to a fouled prop without swimming.ģ) The geometry of the installation means that the engine is under the stern-deck and is thus easy to insulate accousticaly from the wheelhouse/accommodation, whereas a shaft boat typically has the engine underneath a centre wheelhouse - which pretty much guarantees high noise levels. Inboard powereither direct drive or V-driveis less complex and requires less service than a sterndrive, and is also less prone to corrosion in saltwater. and really had no measurable differences docking and maneuvering, at least not enough to go with one over the other.īTW, your profile says you already own the boat.īTW, your signature says you already own the boat.To give you an example, our boat, which has a 350Hp diesel on an outdrive and an enclosed centere wheelhouse is quieter inside at 30kts than my car is on the motorway. I loved them, loved the engine compartment access, being able to adjust the angle, laying the bow down, the speed, etc. I kept an eye on the drives from the dock, never saw growth, corrosion, barnacles, etc. The dockmates Cruisers Yachts was sold and moved to saltwater, strangely a few slips away from the 330DA when it was slipped in salt water temporarily. However, if I had kept her in salt water fulltime I may have gone with the V-Drives. If I had to do it again I would go with the outdrives. They cruised much faster and burned less fuel, oh and had tons more room in the engine compartment. I could never get the bow down even at WOT.ĭockmates owned a similar size/weight Crusiers Yachts with twin 5.7s and Bravo IIIs. I owned a 1995 330DA with V-Drives, twin carberated 7.4s. ![]()
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