Skip to main content Tmp Gearbox Workshop Manual Top 〈2026 Update〉
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"TMP" usually refers to the joint venture between Toyota and Yamaha, producing sterndrives used in Toyota Epic boats and certain Yamaha boats. These units are distinct from Mercruiser or Volvo Penta drives.
Use high-quality SAE 30 engine oil. Avoid multi-grade oils (like 10W-40 or 15W-40), as their friction modifiers can induce clutch slippage in these specific conical setups. tmp gearbox workshop manual top
If your TMP gearbox is part of a larger machine (e.g., a boat engine or industrial conveyor), contact the authorized dealer. They often hold the necessary technical documents. 3. Specialized Technical Manual Repositories
Official documentation, direct parts, and historical support are maintained exclusively by Thamesway Marine Products . Core Specifications & Identification Related search suggestions: (functions
Replace the square-section sealing ring on the internal piston unconditionally during every overhaul. 5. Reassembly & Alignment Rules
: Found on specific Ruston Hornsby or Coventry engines. The internal oil pump runs in reverse, requiring a dedicated, specialized pump assembly. 2. Output Configurations Avoid multi-grade oils (like 10W-40 or 15W-40), as
The , originally built by Thamesway Marine Products, is a classic, heavy-duty hydraulic transmission widely found on vintage marine diesel engines like the Perkins 4.108 and Mercedes. Operating much like a classic automotive epicyclic overdrive system, it utilizes high hydraulic pressure to engage internal planet and sun gears. While highly reliable, its high-pressure operation means that proper maintenance, accurate troubleshooting, and detailed disassembly procedures are critical to prevent leaks and internal slip.
TMP releases its documentation in three tiers: Basic, Professional, and Top. The is the flagship edition. Here is what elevates it above the rest:
The high-pressure design of the TMP 12000 makes it susceptible to specific, predictable failures. Check these common symptoms before removing the unit: High Hydraulic Pressure & Leaks