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6LP-DTE Marine

Yanmar 6LP-DTE · 6LP-DTE family: specifications, its industrial/tractor base engine, cross-referenced parts and where to buy them.

Marinized Toyota 1HD-T (12-valve)

This 6LP is the marine version of the Toyota 1HD-T — the 12-valve (2 valves/cyl) 4.2 L inline-6 Land Cruiser/Coaster diesel. The block, pistons, rings, rods, bearings and the 12-valve head & valves cross to Toyota 1HD-T part numbers (far cheaper than Yanmar). Marinized externals — raw-water pump, manifolds, turbo, sump, drive coupling — are Yanmar-only. Runs a rubber timing belt, not gears.

🚜 Base engine confirmed

The Yanmar 6LP-DTE is a marinized Toyota 1HD-T 4.2 L inline-6 diesel (12-valve Land Cruiser/Coaster block). Internal service parts — block, pistons, rings, rods, bearings, and the 12-valve head — cross to Toyota 1HD-T part numbers, often far cheaper than Yanmar marine. Marinized externals (raw-water pump, manifolds, turbo, sump, drive coupling) are Yanmar-only. This site's 6LP marine parts book covers the Yanmar-side BOM; no Toyota donor BOM is loaded yet. source

250 hp183.9 kW
4164 ccdisplacement
94×100 mmbore × stroke
6-cylcylinders
1997–2001year range (approx)
Turbo + ICaspiration

marinized Toyota 1HD-T (12-valve); max 250mhp@3800 / cont 210mhp@3600

📋 Full specifications 5 🚜 Industrial / tractor base 🔧 Aftermarket 44
Cheaper-part coverage · 4/8
🚜 Base engine ✓🌀 Impeller ✓💧 Raw-water pump🛢️ Oil filter⛽ Fuel filter🌡️ Thermostat➰ Belt ✓⚓ Anode ✓

A ✓ means at least one cheaper channel — aftermarket, the tractor/industrial base engine, or a standard component — exists for this engine in that category.

Parts by section · 65 assemblies

The exploded parts diagrams for the 6LP-DTE, grouped by system. Open a figure for its callout part numbers and per-variant quantities.

Bilge & accessory pumps

Fig 41 — BILGE PUMP(STD,OPTIONAL)Fig 42 — BILGE PUMP(DX,OPTIONAL)

Camshaft & timing gears

Fig 2 — GEAR HOUSING(6LP-DT(Z)E(P)1)Fig 3 — GEAR HOUSING(6LP-ST(Z)E(P)1)Fig 19 — CAMSHAFT(6LP-DT(Z)E(P)1)Fig 20 — CAMSHAFT(6LP-ST(Z)E(P)1)

Controls

Fig 13 — BOOST CONTROL

Cooling – fresh water

Fig 32 — COOLING FRESH WATER PUMPFig 33 — THERMOSTATFig 34 — COOLING FRESH WATER COOLERFig 39 — COOLING FRESH WATER PIPEFig 40 — COOLING FRESH WATER WATER PIPE(TURBINE)

Cooling – sea water

Fig 31 — COOLING SEA WATER PUMPFig 35 — COOLING SEA WATER PIPE(6LP-DTE(P))Fig 36 — COOLING SEA WATER PIPE(6LP-DTZE(P)1)Fig 37 — COOLING SEA WATER PIPE(6LP-STE(P))Fig 38 — COOLING SEA WATER PIPE(6LP-STZE(P)1)

Crankshaft & flywheel

Fig 4 — FLYWHEEL HOUSINGFig 21 — CRANKSHAFT

Cylinder block

Fig 1 — CYLINDER BLOCK

Cylinder head & valves

Fig 16 — CYLINDER HEAD(6LP-DT(Z)E(P)1)Fig 17 — CYLINDER HEAD(6LP-ST(Z)E(P)1)

Electrical & instruments

Fig 51 — GLOW PLUGFig 57 — STARTING MOTORFig 59 — INSTRUMENT PANEL(B-TYPE,OPTIONAL)Fig 60 — INSTRUMENT PANEL(C-TYPE,ONPTONAL)Fig 61 — INSTRUMENT PANEL(D-TYPE,ONPTONAL)Fig 62 — WIRE HARNESS & SENSORFig 63 — SENSOR MOUNT

Fuel injection pump & governor

Fig 43 — FUEL INJECTION PUMP

Fuel injectors & nozzles

Fig 44 — FUEL INJECTION VALVE (6LP-DT(Z)E(P)1)Fig 45 — FUEL INJECTION VALVE (6LP-ST(Z)E(P)1)

Fuel lines, tank & filter

Fig 46 — FUEL INJECTION PIPE(6LP-DT(Z)E(P)1)Fig 47 — FUEL INJECTION PIPE(6LP-ST(Z)E(P)1)Fig 48 — FUEL PIPEFig 49 — FUEL STRAINERFig 50 — FUEL COOLER

Gaskets, kits & spare parts

Fig 65 — SPARE PART(OPTINAL)

Generator (genset)

Fig 58 — GENERATOR

Intake and Exhaust

Fig 9 — TURBINEFig 10 — EXHAUST BENDFig 11 — AIR COOLERFig 12 — AIR DUCTFig 14 — EXHAUST MANIFOLDFig 15 — SUCTION MANIFOLDFig 29 — LUB. OIL PIPE(TURBINE)Fig 30 — OIL SUCTION/DRAIN PUMP

Lubricating

Fig 6 — LUB. OIL SUMPFig 8 — BREATHERFig 24 — LUB. OIL COOLERFig 25 — LUB. OIL COOLER(6LP-ST(Z)E(P)1)Fig 26 — LUB. OIL COOLER COVER(6LP-DT(Z)Fig 27 — LUB. OIL COOLER COVER(6LP-ST(Z)Fig 28 — LUB. OIL PIPE

Mounting

Fig 5 — MOUNTING FOOTFig 18 — ENGINE LIFTERFig 22 — DAMPERFig 52 — CABLE BRACKET

Pistons, rods & liners

Fig 23 — PISTON & CONNECTING RODFig 53 — POWER STEERING PUMPFig 54 — POWER STEERING COOLER & TANK

Tools & labels

Fig 7 — LABELFig 64 — TOOL(OPTIONAL)

Transmission & drive

Fig 55 — ATF PIPEFig 56 — CLUTCH & DRIVE ATTACHMENT
📚 Manuals & Sources
Specs— none yet
Operator's Manual— none yet
Service / Workshop Manual— none yet
Parts Catalog / List— none yet
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Category
Marine
Engine family
6LP-DTE
Year range (approx)
1997–2001
Cylinders
6
Rated output
250 hp (183.9 kW)
Bore × stroke
94 × 100 mm
Displacement
4164 cc
Max rpm
3800
Continuous rpm
3600
Aspiration
Turbocharged + intercooled