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Westerbeke 12B Two Marine

Westerbeke Westerbeke 12B Two · 12B-TWO family: specifications, its industrial/tractor base engine, cross-referenced parts and where to buy them.

🚜 Base engine confirmed

The Westerbeke 12B-Two is a marinized Mitsubishi L2E industrial block (L2E-62WM); internals cross to Mitsubishi L2E part numbers. source

12 hp8.8 kW
635 ccdisplacement
76×70 mmbore × stroke
2-cylcylinders
1983–1992year range (approx)
NAaspiration
📋 Full specifications 2 🚜 Industrial / tractor base 481 🔧 Aftermarket 30
Cheaper-part coverage · 6/8
🚜 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 · 37 assemblies

The exploded parts diagrams for the Westerbeke 12B Two, grouped by system. Open a figure for its callout part numbers and per-variant quantities.

Cooling

Fig 112 — WESTERBEKE 12C TWO - COOLING SYSTEMFig 208 — COOLING SYSTEMFig 212 — SEA WATER PUMPFig 214 — FRESH WATER PUMP -ALTERNATOR

Crankshaft & Pistons

Fig 100 — WESTERBEKE 12C TWO - CRANKSHAFT - PISTONSFig 202 — CRANKSHAFT -PISTONS

Electrical

Fig 126 — WESTERBEKE 12C TWO - ELECTRICAL SYSTEMFig 128 — I.IESTERBEKE 12C TI.IO - INSTRUMENT PANELSFig 230 — ELECTRICAL SYSTEMFig 232 — MARINE HARNESSFig 234 — PROPULSION INSTRUMENT PANEL

Engine Block & Head

Fig 1 — WESTERBEKE 12C TWO - CYLINDER BLOCKFig 200 — CYLINDER BLOCK AND HEAD

Fuel

Fig 113 — WESTERBEKE 12C TWO - GOVERNOR SYSTEMFig 122 — WESTERBEKE 12C TWO - FUEL SYSTEMFig 216 — GOVERNORFig 218 — IDLE STOP ASSEMBLYFig 220 — FUEL SYSTEM

Generator

Fig 236 — WESTERBEKE 3KW - GENERATOR MOUNTING SYSTEMFig 238 — WESTERBEKE 3KW - ELECTRICAL SYSTEMFig 242 — WESTERBEKE 3KW - GENERATOR CONTROL PANELFig 244 — WESTERBEKE 3KW - FUEL SOLENOID ASSEMBLYFig 246 — WESTERBEKE 3KW - GENERATOR 2 WIRE 60 HERTZFig 250 — WESTERBEKE 3KW - GENERATOR 3 WIRE 60 HERTZFig 252 — WESTERBEKE 3KW - GENERATOR 3 WIRE 60 HERZFig 254 — WESTERBEKE 3KW -BELT GUARD

Lubricating

Fig 206 — LUBE OIL PUMP AND SUMP

Miscellaneous

Fig 135 — WESTERBEKE 12C TWO - MISCELLANEOUSFig 255 — MISCELLANEOUS

Transmission & Mounting

Fig 130 — WESTERBEKE 12C TWO - BACK END TO DECEMBERFig 132 — 12C - BACK END FROM DECEMBER 1993 ~ESTERBEKE T~OFig 134 — WESTERBEKE 12C TWO - TRANSMISSION SHIFTING BRACKETFig 226 — PROPULSION BACK END AND MOUNTING SYSTEM

Valve Train

Fig 104 — WESTERBEKE 12C TWO - CYLINDER HEAD - VALVES - ROCKER SHAFTFig 108 — WESTERBEKE t2C TWO - CAMSHAFT - TIMING SYSTEMFig 109 — WESTERBEKE 12C TWO - CAMSHAFT - TIMING SYSTEMFig 204 — CAMSHAFT-ROCKER SHAFT
📚 Manuals & Sources
Specs— none yet
Operator's Manual— none yet
Service / Workshop Manual— none yet
Parts Catalog / List
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Category
Marine
Engine family
12B-TWO
Year range (approx)
1983–1992
Cylinders
2
Rated output
12 hp (8.8 kW)
Bore × stroke
76 × 70 mm
Displacement
635 cc
Max rpm
3600
Aspiration
Naturally aspirated