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.

WG1903 Engine Parts (49 parts)

EG523-12240 SENSOR(O2) $243.10 EG543-91490 STUD M8X23 $9.71 EG543-68330 SENSOR(CAM) $67.81 EG543-12230 GASKET MUFFLER $7.25 EG542-99760 VALVE LOCKOFF $78.83 EG525-46960 CONNECTOR ASSY VAP $13.80 EG523-67710 SPARK PLUG $32.23 EG523-67090 COIL IGNITION $125.78 EG523-46990 RUBBER SEALING MIXER $21.69 EG523-46980 RUBBER SEALING D-EPR $10.56 EG523-46970 RUBBER SEALING D-EPR $8.86 EG523-46960 RUBBER SEALING D-EPR $5.55 EG523-46950 VALVE[LOCKOFF] $376.11 EG523-46943 REGULATOR $985.10 EG523-46923 REGULATOR ASSY $1,009.02 EG523-46110 GASKET[THROTTLE] $4.82 EG523-44940 FLANGE[INLET] $24.94 EG523-44800 SENSOR[TMAP] $154.43 EG523-44010 MIXER,ASSY $829.36 EG523-44000 BODY,THROTTLE,COMP $654.05 EG523-12380 GASKET[MUFFLER,2] $7.89 EG523-12370 GASKET[MUFFLER,1] $7.44 EG523-03800 SENSOR[KNOCK] $226.10 EG522-52070 MANIFOLD[FPM] $878.47 EG522-52020 PUMP FUEL $275.36 EG522-44020 INJECTOR $106.83 E9121-68332 ASSY SENSOR,STICK $98.52 1J873-36412 GAUGE ENG. OIL $28.68 1J508-65390 CLAMP(WIRE) $1.93 1G730-73036 ASSY PUMP,WATER $184.68 1G730-37162 HOSE,OIL COOLER $16.29 1E013-35013 ASSY PUMP,OIL $120.09 1A024-39010 SWITCH,OIL $27.43 1A021-73013 ASSY THERMOSTAT $33.75 1A021-51663 GASKET, PUMP COVER $2.92 1A021-33112 FLANGE,OIL FILLER $12.60 17490-74112 FAN $177.42 17123-97012 BELT,FAN(43.0) $26.46 17123-63017 ASSY STARTER $476.69 17112-97012 BELT,FAN(40.0) $25.11 16661-74110 FAN $78.56 16414-01504 COMP.OIL PAN $232.50 16241-05670 ELEMENT,BREATHER $3.63 15451-96300 CAP,SEALING $3.19 03024-50425 SCREW,WITH WASHER $0.21 02756-50080 NUT,UBS $0.79 01774-51080 BOLT,FLANGE $2.89 01350-10516 BOLT $0.79

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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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349 S 100 W, American Fork, UT 84003 · Mon–Fri 7:00 AM – 5:00 PM · Sat by Appt