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Westerbeke W71B Four Marine

Westerbeke Westerbeke W71B Four · W family: specifications, its industrial/tractor base engine, cross-referenced parts and where to buy them.

🚜 Base engine confirmed

The Westerbeke W71B is a marinized Perkins 4.154 block (154 cu in — typically the Mazda-built Japanese 4.154); internal service parts cross to Perkins 4.154 industrial numbers, sold cheaper through industrial/agricultural channels. source

71 hp52.2 kW
4-cylcylinders
NAaspiration
📋 Full specifications 🚜 Industrial / tractor base 🔧 Aftermarket 18
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 · 27 assemblies

The exploded parts diagrams for the Westerbeke W71B Four, grouped by system. Open a figure for its callout part numbers and per-variant quantities.

Body

Fig 146 — WESTERBEKE 20.0 BED - AC OUTPUT AND REGULATORFig 150 — WESTERBEKE 71B - 20.0 BED - BELTS - BELT GUARD

Cooling

Fig 116 — WESTERBEKE 71B - 20.0 BED - COOLING SYSTEMFig 124 — WESTERBEKE 71B - 20.0 BED - SEA WATER PUMPFig 126 — WESTERBEKE 71B - 20.0 BED - FRESH WATER PUMP

Crankshaft & Pistons

Fig 104 — WESTERBEKE 71B - 20.0 BED - CRANKSHAFT - PISTONS

Electrical

Fig 152 — WESTERBEKE 71B - 20.0 BED - ELECTRICAL SYSTEMFig 154 — WESTERBEKE 71B FOUR - PROPULSION INSTRUMENT PANELSFig 158 — WESTERBEKE 71B FOUR - PROPULSION STARTER MOTOR

Engine Block & Head

Fig 1 — WESTERBEKE 71B - 20.0 BED - CYLINDER BLOCKFig 102 — UESTERBEKE 71B - 20.0 BED - CYLINDER HEAD

Fuel

Fig 128 — WESTERBEKE 71B - 20.0 BED - FUEL SYSTEMFig 148 — WESTERBEKE 20.0 BED - ELECTRONIC GOVERNOR ACTUATOR

Generator

Fig 142 — WESTERBEKE 20.0 BED - BACK END - GENERATORFig 156 — 20.0 BED - GENERATOR CONTROL PANEL ~ESTERBEKEFig 159 — WESTERBEKE 20.0 BED - GENERATOR SOUND GUARD

Inlet & Exhaust

Fig 109 — WESTERBEKE 71B - 20.0 BED - INTAKE MANIFOLD AND SILENCERFig 122 — WESTERBEKE 71B FOUR - FRONT OPENING EXHAUST MANIFOLD

Lubricating

Fig 112 — WESTERBEKE 71B - 20.0 BED - LUBE OIL SUMPFig 114 — WESTERBEKE 71B - 20.0 BED - LUBE OIL PUMPFig 115 — WESTERBEKE 71B - 20.0 BED - LUBE OIL COOLER AND FILTER

Miscellaneous

Fig 161 — 71B - 20.0 BED - MISCELLANEOUS ~ESTERBEKE

Transmission & Mounting

Fig 134 — WESTERBEKE 71B FOUR - BACK END - MODEL HBW TRANSMISSION - MOUNTSFig 138 — WESTERBEKE 71B FOUR - WARNER TRANSMISSIONFig 140 — WESTERBEKE 20.0 BED - MOUNTING SYSTEM

Valve Train

Fig 106 — YESTERBEKE 718 - 20.0 BED - VALVES - CAMSHAFT - ROCKER SHAFTFig 108 — WESTERBEKE 71B - 20.0 BED - TIMING GEAR COVER - ALTERNATOR MOUNT
📚 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
W
Cylinders
4
Rated output
71 hp (52.2 kW)
Aspiration
Naturally aspirated

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