gear case

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gear case

[′gir ‚kās]
(mechanical engineering)
An enclosure, usually filled with lubricating fluid, in which gears operate.
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Boasting improved overall performance and docking manoeuvrability for heavier boats, added thrust and holding power for low planing speeds or overall holding in rough waters, the new robust Mercury Command Thrust gearcase delivers unequalled control and power for heavier boats or boats that tend to operate with more hull surface remaining in contact with the water.
Combining the strengths of old and new--proven inspection methods and modern microprocessor techniques--was the key to implementing advanced manufacturing strategies at OMC Corp's new gearcase plant in Andrews, NC.
Equally new to the marine industry as a whole are the myriad technological advances Seven Marine has brought to the outboard market with the 557, including closed-loop cooling, ZF's Joystick Maneuvering System (JMS) as well as an ultra-smooth shifting ZF CAN-bus controlled disc-clutch transmission, Seven's proprietary twin-pinion gearcase with nearly unlimited gearing options, an ECU-controlled octane scaler, dual 3.
9-inch torpedo shaped gearcase, steel balance shaft gears, heavy duty transom bracket, freshwater flush system, 60-amp alternator, idle exhaust relief system, and SmartCraft SmartStart (making it impossible to grind the starter gear).
Refill the gearcase with the manufacturer's recommended gear lube.
Gearcase retrofits are available for various brands of extruders.
After I completed the job, because the boat was now on a trailer and the gearcase was accessible, I changed the gear oil, which usually entails draining the old and installing the new.
Also, change the gearcase oil and crankcase oil after 20 hours, and replace the oil filter after 200 hours or one year.
While many innovations can't be seen without taking off the cowling, looking at the lower unit on Suzuki's 250SS will leave no doubt that this streamlined bullet gearcase came directly from offshore racing.