TMP Type 12000 marine gearbox is a high-pressure hydraulic unit originally manufactured by Thamesway Marine Products (TMP)
If your TMP gearbox leaks from the split line after a rebuild, you need the Top manual. It provides a :
The manual reveals a curious mechanical geometry. Depending on the specific reduction box attached, your propeller might spin in a different direction than your engine: : Propeller spins the same way as the engine. 2-Pinion Reduction : Propeller spins the opposite way.
The most common cause of TMP gearbox failure is neglected oil. Because the gearbox uses the same oil for both lubrication and hydraulic actuation, it must be kept pristine.
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