Kubota WG1903 Engine Parts

Alpine Equipment stocks OEM and aftermarket parts for the Kubota WG1903 engine — filters, gaskets, seals, pumps, water pumps, injectors, and complete rebuild components. Same-day shop pickup in Utah County; nationwide shipping.

Need pricing on a complete WG1903 engine or a full rebuild? Call our factory-certified Kubota team at (801) 701-7394.

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Kubota WG1903 gas engine — genuine parts from Alpine Equipment Repair
  • Cylinders3
  • Displacement114.0 cu.in.
  • Bore & Stroke3.465ﾗ4.031 in
  • Rated Output43.6–46.9 HP
  • Max Torque97.4–103 lb-ft
  • AspirationNaturally aspirated
  • Dry Weight364–380 lbs

Specs vary by engine variant/spec code. Confirm fitment by part number or call us.

Kubota WG1903 Manuals & Parts Diagrams

Official Kubota parts lists and service-data reference for this model. Use them to find the exact part number or spec, then search or call to order. Or browse the full Kubota manual library.

Illustrated Parts Lists

Service Data

WG1903 Engine Parts (53 parts)

Genuine Kubota SENSOR(O2), part number EG523-12240 — Alpine Equipment EG523-12240 SENSOR(O2) $243.10 Genuine Kubota housing, flywheel, part number 1G850-04614 — Alpine Equipment 1G850-04614 HOUSING, FLYWHEEL $1,028.75 Genuine Kubota pulley, fan, part number 17490-74252 — Alpine Equipment 17490-74252 PULLEY, FAN $62.27 Genuine Kubota cover, thermos, part number 16669-73262 — Alpine Equipment 16669-73262 COVER, THERMOS $67.67 Genuine Kubota belt, FAN(41.0), part number 16343-97012 — Alpine Equipment 16343-97012 BELT, FAN(41.0) $33.03 Genuine Kubota stud M8X23, part number EG543-91490 — Alpine Equipment EG543-91490 STUD M8X23 $9.71 Genuine Kubota sensor(cam), part number EG543-68330 — Alpine Equipment EG543-68330 SENSOR(CAM) $67.81 Genuine Kubota gasket muffler, part number EG543-12230 — Alpine Equipment EG543-12230 GASKET MUFFLER $7.25 Genuine Kubota valve lockoff, part number EG542-99760 — Alpine Equipment EG542-99760 VALVE LOCKOFF $78.83 Genuine Kubota connector assy vap, part number EG525-46960 — Alpine Equipment EG525-46960 CONNECTOR ASSY VAP $13.80 Genuine Kubota spark plug, part number EG523-67710 — Alpine Equipment EG523-67710 SPARK PLUG $32.23 Genuine Kubota coil ignition, part number EG523-67090 — Alpine Equipment EG523-67090 COIL IGNITION $125.78 Genuine Kubota rubber sealing mixer, part number EG523-46990 — Alpine Equipment EG523-46990 RUBBER SEALING MIXER $21.69 Genuine Kubota rubber sealing d-epr, part number EG523-46980 — Alpine Equipment EG523-46980 RUBBER SEALING D-EPR $10.56 Genuine Kubota rubber sealing d-epr, part number EG523-46970 — Alpine Equipment EG523-46970 RUBBER SEALING D-EPR $8.86 Genuine Kubota rubber sealing d-epr, part number EG523-46960 — Alpine Equipment EG523-46960 RUBBER SEALING D-EPR $5.55 Genuine Kubota valve[lockoff], part number EG523-46950 — Alpine Equipment EG523-46950 VALVE[LOCKOFF] $376.11 Genuine Kubota regulator, part number EG523-46943 — Alpine Equipment EG523-46943 REGULATOR $985.10 Genuine Kubota regulator assy, part number EG523-46923 — Alpine Equipment EG523-46923 REGULATOR ASSY $1,009.02 Genuine Kubota gasket[throttle], part number EG523-46110 — Alpine Equipment EG523-46110 GASKET[THROTTLE] $4.82 Genuine Kubota flange[inlet], part number EG523-44940 — Alpine Equipment EG523-44940 FLANGE[INLET] $24.94 Genuine Kubota sensor[tmap], part number EG523-44800 — Alpine Equipment EG523-44800 SENSOR[TMAP] $154.43 Genuine Kubota mixer,assy, part number EG523-44010 — Alpine Equipment EG523-44010 MIXER,ASSY $829.36 Genuine Kubota body,throttle,comp, part number EG523-44000 — Alpine Equipment EG523-44000 BODY,THROTTLE,COMP $654.05 Genuine Kubota GASKET[MUFFLER,2], part number EG523-12380 — Alpine Equipment EG523-12380 GASKET[MUFFLER,2] $7.89 Genuine Kubota GASKET[MUFFLER,1], part number EG523-12370 — Alpine Equipment EG523-12370 GASKET[MUFFLER,1] $7.44 Genuine Kubota sensor[knock], part number EG523-03800 — Alpine Equipment EG523-03800 SENSOR[KNOCK] $226.10 Genuine Kubota manifold[fpm], part number EG522-52070 — Alpine Equipment EG522-52070 MANIFOLD[FPM] $878.47 Genuine Kubota pump fuel, part number EG522-52020 — Alpine Equipment EG522-52020 PUMP FUEL $275.36 Genuine Kubota injector, part number EG522-44020 — Alpine Equipment EG522-44020 INJECTOR $106.83 Genuine Kubota assy sensor,stick, part number E9121-68332 — Alpine Equipment E9121-68332 ASSY SENSOR,STICK $98.52 Genuine Kubota gauge eng. oil, part number 1J873-36412 — Alpine Equipment 1J873-36412 GAUGE ENG. OIL $28.68 Genuine Kubota clamp(wire), part number 1J508-65390 — Alpine Equipment 1J508-65390 CLAMP(WIRE) $1.93 Genuine Kubota assy pump,water, part number 1G730-73036 — Alpine Equipment 1G730-73036 ASSY PUMP,WATER $184.68 Genuine Kubota hose,oil cooler, part number 1G730-37162 — Alpine Equipment 1G730-37162 HOSE,OIL COOLER $16.29 Genuine Kubota assy pump,oil, part number 1E013-35013 — Alpine Equipment 1E013-35013 ASSY PUMP,OIL $120.09 Genuine Kubota switch,oil, part number 1A024-39010 — Alpine Equipment 1A024-39010 SWITCH,OIL $27.43 Genuine Kubota assy thermostat, part number 1A021-73013 — Alpine Equipment 1A021-73013 ASSY THERMOSTAT $33.75 Genuine Kubota gasket, pump cover, part number 1A021-51663 — Alpine Equipment 1A021-51663 GASKET, PUMP COVER $2.92 Genuine Kubota flange,oil filler, part number 1A021-33112 — Alpine Equipment 1A021-33112 FLANGE,OIL FILLER $12.60 Genuine Kubota fan, part number 17490-74112 — Alpine Equipment 17490-74112 FAN $177.42 Genuine Kubota BELT,FAN(43.0), part number 17123-97012 — Alpine Equipment 17123-97012 BELT,FAN(43.0) $26.46 Genuine Kubota assy starter, part number 17123-63017 — Alpine Equipment 17123-63017 ASSY STARTER $476.69 Genuine Kubota BELT,FAN(40.0), part number 17112-97012 — Alpine Equipment 17112-97012 BELT,FAN(40.0) $25.11 Genuine Kubota fan, part number 16661-74110 — Alpine Equipment 16661-74110 FAN $78.56 Genuine Kubota comp.oil pan, part number 16414-01504 — Alpine Equipment 16414-01504 COMP.OIL PAN $232.50 Genuine Kubota element,breather, part number 16241-05670 — Alpine Equipment 16241-05670 ELEMENT,BREATHER $3.63 Genuine Kubota cap,sealing, part number 15451-96300 — Alpine Equipment 15451-96300 CAP,SEALING $3.19

More Kubota Engine Parts

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Need pricing on a Kubota WG1903 engine or a rebuild?

We sell, exchange, and rebuild Kubota engines — and stock the parts to keep yours running. Call or send a quote request.

(801) 701-7394

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