8.12 GEAR BOX

The main functions of a marine gearbox are the following:

• Couple the engine with the propeller shaft and reduce the number of revolutions of the propeller;
• Reverse the motion direction;
• Interrupt the propeller shaft motion (idle).

The gear boxes are provided with several documents.
We suggest you to read the operating instruction manual carefully and in detail.

Oil level check

Check the oil level only when the engine is OFF. The proper oil level is between the upper and the lower notch of the control rod.
After the first oil filling, a repair or the cleaning of the oil filter, the gearbox must be run for about two minutes.
Next the oil level check has to be carried out again two minutes after the engine has stopped.

CAUTION

Before starting checking the oil level, check that the gearbox oil temperature complies with the normal operating specifications.

ENVIRONMENT

Recover waste oil following the norms in force, relevant to special waste disposal.

DANGER

Service the gear box only if engine and propellers are stopped and the magneto-thermal switch is OFF. Before starting the inverter, carry out the filling and the consequent check of the oil level. The use of the gearbox with a low quantity of oil may damage the gears. An excess of oil might cause leaks to the seals and to the vent and increase remarkably the operating temperature.