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2007-05-31 15:12:29 · 7 answers · asked by [u]Ka1 1 in Cars & Transportation ➔ Boats & Boating
Perhaps I should have said that it would pertain to sportboats mostly? Why not get up to speed through the gears whatever range they may have to be.......
2007-05-31 15:35:54 · update #1
Boats don't have manual transmissions but they do have transmissions (called marine gears) that are hydraulic with forward, neutral and reverse. Yanmar has a marine gear with two forward speeds for better efficiency.
2007-06-01 00:29:38 · answer #1 · answered by mark t 7 · 0⤊ 0⤋
A boat engine is constantly under a load. Imagine taking your car, attach a U Haul trailer full of rocks and drive up a 30 degree incline all day. That's what your boat is trying to do when it displaces all that water, you call "wake". Having a second gear in the transmission would burn up the engine. the size of the propeller is determined by the hull shape, weight, engine HP and gear ratio of the transmission, all in the name of putting the least am mount of load on the engine. Reliability of a manual transmission in the bilge of a boat is also why they use hydraulic. Try pushing in the clutch while driving from a fly bridge?
2007-06-01 02:27:18 · answer #2 · answered by Ronald M 1 · 0⤊ 0⤋
There is nothing keeping a boat from moving like there is a car.
If a car had a single speed it would be very hard to get the weight of the car moving.
With a boat you just get the prop spinning, the boat will gain speed accordingly.
If a boat was geared like a car it would not be efficient. A boat doesnt need to be turning 4K RPMs at 20mph like a car does. Most can't go as fast as cars so the extra gears aren't needed. Our boat goes 55 max, my car does that in 2nd but still has 3 more gears, it would be useless to have the extra gears in a boat.
There also isn't constant stop and start driving in a boat like in a car. Once you get going you basically hold that speed until you get where you are going.
2007-05-31 15:19:29 · answer #3 · answered by Anonymous · 0⤊ 1⤋
Boats do have manual transmissions. They generally only have one gear forward and one reverse and neutral.... but not a clutch. A clutch is not needed, because the water is a viscous medium and the propeller will slip in the water.
2007-06-01 03:17:52 · answer #4 · answered by squeezie_1999 7 · 1⤊ 1⤋
Some ships have clutches. When there are two or more main propulsion units attached to one shaft, a clutch is necessary to ensure smooth transition from using one or more engines. Good shiphandling makes clutches in small boats unnecessary. RPM control replaces the need for a clutch.
2007-05-31 17:32:21 · answer #5 · answered by Richard B 4 · 0⤊ 0⤋
boats don't have a transmission like a car it only has two gears forward and reverse. that is way boats use some much gas.
2007-05-31 15:31:27 · answer #6 · answered by joseph s 1 · 0⤊ 2⤋
they do forward and reverse
2007-05-31 15:16:09 · answer #7 · answered by Anonymous · 0⤊ 1⤋