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A V-drive is a power transmission system for boats that consists (usually) of two gearboxes, two drive shafts, and a propeller. Whereas the conventional arrangement sites the engine with its gearbox aft, driving the propeller shaft directly, in a "V-drive" layout, the engine is reversed, to have the gearbox in front.
A keel cooler is a type of internal combustion engine cooling system used in marine engines. In this system, engine coolant is circulated through a system of tubing outside the vessel's hull, using the lower temperature of seawater to reduce the coolant temperature via heat exchange before it is recirculated through the engine. [ 1 ]
Maintenance of marine heat exchangers is important to ensure the small pathways in both types of coolers do not become fouled. Depending on the system different types fouling may occur. In oil based systems, an insufficient amount of cooling medium or inefficient flow of oil through the heater can cause the heater to become fouled.
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It is essentially the same as the M-35 except that it has provisions for an external transmission oil cooler. The M-35 was air cooled by the torque converter with a fan on it. The M-35 case has provisions to be drilled for an external cooler, but no U.S. models used an external cooler and do not have the internal provisions to mount one.
Inside of a 231 New Process Gear transfer case. Part-time/Manual, shift on the fly. A transfer case is an intermediate gearbox that transfers power from the transmission of a motor vehicle to the driven axles of four-wheel-drive, all-wheel-drive, and other multi-axled on- and off-road machines.
The 12V-53 is a low-production / prototype engine consisting of two coupled 6V-53 engines; fewer than 20 were estimated to have been built, mostly for marine service in generator sets. One of the 6V-53 engines was a left-hand rotation and the other was right-hand rotation; they were coupled at their flywheels. [9]
This style of transmission was also widespread in UK buses, from a range of manufacturers, until different types came onto the market in the 1980s. A further advance was the fully automatic gearbox, which still used the same principles but shifted gears automatically.