: The extra idler gear corrects rotation; the propeller turns in the same direction as the engine. Bench Layout and Rigorous Disassembly Workflows
If you cannot find the exact manual, the following generic data applies to many compact TMP manual gearboxes (4 or 5-speed, FWD or RWD):
: 95 to 100 p.s.i. (Standard operation around 80 p.s.i. is also common) Oil Capacity Main Box: 2 1/4 Pints Reduction Box: 1 Pint Lubrication : Engine lubrication oil, specifically
By combining the official workshop manual with the collective knowledge of the boating community, you will be well-equipped to maintain, troubleshoot, and even rebuild this classic marine gearbox. Good luck, and smooth sailing! tmp gearbox workshop manual top
TMP Type 12000 Marine Gearbox , manufactured by Thamesway Marine Products (TMP)
The gearbox and bell-housing must often be removed as a single unit.
If the propeller continues to spin rapidly when the selector valve is set to neutral, the (Part No. TM 12016) is likely worn out or the control cable alignment is dragging the valve slightly out of its detent. Slipping in Ahead Drive This is typically caused by two issues: : The extra idler gear corrects rotation; the
Routine maintenance is the key to longevity. The manual will outline: How to check and change gear oil. Cleaning the oil cooler. Replacing oil seals.
If you are experiencing drive issues, the workshop manual typically points to three main culprits:
Because the TMP gearbox is secured to the engine bell housing by internal nuts, you must pull the gearbox and the bell housing away from the engine as a single combined unit. Because the bell housing frequently supports the rear engine mounts, ensure your engine block is safely blocked and supported from underneath prior to unbolting. is also common) Oil Capacity Main Box: 2
Never reuse old seals, gaskets, or O-rings during rebuilds. Use the official parts codes below to prepare your rebuild kit. Required Replacement Parts Component Target Area Part Code Identification (Direct Drive) Part Code Identification (Reduction Box) TM 12020 × 1 TM 12436 × 1 Transfer Shaft Seal TM 12436 × 1 Output Shaft Seal TM 12470 × 1 TM 12470 × 1 Full Gasket / O-Ring Set TM 12016 × 1 TM 12016 × 1 Neutral Brake Pad TM 12090 × 1 TM 12090 × 1 Oil Filter (MK II / MK IV) TM 12009 / TM 12773 TM 12009 / TM 12773 5. Troubleshooting Pressure and Alignment Faults
If you are looking for a manual for oil rig equipment (often also abbreviated as TMP), there are digital copies of the Varco TDS-11SA Top Drive System manuals available on platforms like Scribd .
Carefully cut a into the outer housing adapter.
. Avoid multi-grade oils (like 15W40), as they can cause clutch slippage.