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4BY2-150Z Marine

Yanmar 4BY2-150Z · 4BY2 family: specifications, its industrial/tractor base engine, cross-referenced parts and where to buy them.

Marinized BMW N47 2.0 L (common-rail)

The 4BY2-150Z is the emissions-trim version of the 4BY2-150. Both share the BMW N47D20 base engine — the 2.0 L inline-4 common-rail diesel. Internal wear parts (oil filter element, fuel filter, timing components) cross to BMW N47 numbers. Marine-specific externals are Yanmar-only.

🚜 Base engine confirmed

The Yanmar 4BY2-150Z is the emissions trim of the marinized BMW N47D20 2.0 L. Internals cross to BMW N47; marinized externals are Yanmar-only. No BMW donor BOM loaded yet. source

150 hp110.3 kW
1995 ccdisplacement
84×90 mmbore × stroke
4-cylcylinders
2008–2014year range (approx)
Turbo + ICaspiration

emissions trim of 4BY2-150

📋 Full specifications 🚜 Industrial / tractor base 🔧 Aftermarket 17
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 · 52 assemblies

The exploded parts diagrams for the 4BY2-150Z, grouped by system. Open a figure for its callout part numbers and per-variant quantities.

Belts & pulleys

Fig 17 — V-BELT

Bilge & accessory pumps

Fig 30 — BILGE PUMP(OPTION)

Camshaft & timing gears

Fig 2 — LOWER TIMING CASEFig 15 — TIMING CHAIN LOWER P/DAMPERFig 16 — CAMSHAFT & TIMING GEAR CHAIN

Cooling – fresh water

Fig 26 — HEAT EXCHANGERFig 27 — HEAT EXCHANGER(INNER PARTS)

Cooling – sea water

Fig 25 — COOLING PUMP(SEA WATER)Fig 47 — COOLING SEA WATER PIPE & COUPLING(ZT SPEC)Fig 48 — COOLING SEA WATER PIPE & EXHAUST BEND(OPTION)

Crankshaft & flywheel

Fig 3 — FLYWHEEL HOUSINGFig 12 — CRANKSHAFTFig 13 — FLYWHEEL & CYLINDER MOUNTING PARTS

Cylinder block

Fig 1 — CYLINDER BLOCK

Cylinder head & valves

Fig 7 — CYLINDER HEAD/VALVE TRAIN-CAMSHAFTFig 9 — CYLINDER HEAD COVERFig 43 — TOP COVER & V-BELT COVERFig 49 — VALVE(OIL STOP)(OPTION)

Electrical & instruments

Fig 8 — CYLINDER HEAD ATTACHED/GLOW PLUGFig 37 — STARTING MOTORFig 38 — ALTERNATORFig 39 — WIRE HARNESS(ECU)Fig 40 — WIRE HARNESSFig 42 — ECUFig 46 — VDO GAUGE(OPTION)

Fuel injectors & nozzles

Fig 35 — HIGH-PRESSURE PUMP/INJECTOR

Fuel lines, tank & filter

Fig 33 — FUEL OIL FILTERFig 34 — PUMP, FUEL LOWFig 36 — FUEL FILTERFig 45 — FUEL FILTER(OPTION)

Intake and Exhaust

Fig 10 — INTAKE MANIFOLDFig 11 — TURBOCHARGER & AIR FILTERFig 21 — LUB. OIL PIPE(TURBINE)Fig 22 — AIR COOLERFig 23 — AIR COOLER(INNER PARTS)Fig 29 — MIXING ELBOWFig 41 — AIR HEATERFig 44 — MIXING ELBOW HIGH RISER(OPTION)Fig 50 — (11A)AIR FILTER (OPTION)

Lubricating

Fig 4 — OIL PAN/LUB. OIL SUMPFig 18 — LUB. OIL PUMPFig 19 — LUB. OIL FILTERFig 31 — STEERING OIL COOLER

Mounting

Fig 5 — ENGINE BRACKET

Other / general

Fig 20 — ROTARY PUMP(OPTION)Fig 24 — WATER PUMPFig 28 — HOSE, FW PUMP

Pistons, rods & liners

Fig 14 — PISTON & CONNECTING RODFig 32 — STEERING PUMP/PIPE

Tools & labels

Fig 6 — LABELFig 52 — TOOL

Transmission & drive

Fig 51 — (42A)ECU EXTENSION HARNES KIT(OPTION)
📚 Manuals & Sources
Specs— none yet
Operator's Manual— none yet
Service / Workshop Manual— none yet
Parts Catalog / List— none yet
More📖 Boat Inboard Engine Manuals Boat Manuals

External links — we host none of these documents.

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Category
Marine
Engine family
4BY2
Year range (approx)
2008–2014
Cylinders
4
Rated output
150 hp (110.3 kW)
Bore × stroke
84 × 90 mm
Displacement
1995 cc
Max rpm
4000
Continuous rpm
3876
Aspiration
Turbocharged + intercooled

Related 4BY2 engines

4BY2-1504BY2-1804BY2-180Z