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Kubota WG3800-GL-E3 - User Manual

Kubota WG3800-GL-E3
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WG1605
-
G
-
E3/L
-
E3/GL
-
E3/N
-
E3/LN
-
E3
WG1903
-
G
-
E3/L
-
E3/GL
-
E3/N
-
E3/LN
-
E3
WG2503
-
G
-
E3/L
-
E3/GL
-
E3/N
-
E3/LN
-
E3
WG3800
-
G
-
E3/L
-
E3/GL
-
E3/N
-
E3/LN
-
E3/L
-
E5/N
-
E5
PRINTED IN JAPAN
©
KUBOTA Corporation 2011
U.S.A. :KUBOTAENGINEAMERICACORPORATION
505
SchelterRoad,Lincolnshire,Illinois
60069
U.S.A.
Telephone:(
847
)
955
-
2500
Canada :KUBOTACANADALTD.
5900
14
thAvenue,Markham,Ontario,L
3
S
4
K
4
,Canada
Telephone:(
905
)
294
-
7477
France :KUBOTAEUROPES.A.S
19
-
25
,RueJulesVercruysse,Z.I.BP
88
,
95101
ArɡenteuilCedex,France
Telephone:(
33
)
1
-
3426
-
3434
Italy :KUBOTAEUROPES.A.SItalyBranch
ViaGrandi,
29
20068
PeschieraBorrome(MI)Italy
Telephone:(
39
)
02
-
51650377
Germany :KUBOTA(DEUTSCHLAND)GmbH
SenefelderStr.
3
-
5
63110
Rodɡau/Nieder-Roden,Germany
Telephone:(
49
)
6106
-
873
-
0
U.K. :KUBOTA(U.K.)LTD.
DormerRoad,Thame,Oxfordshire,OX
9
3
UN,U.K.
Telephone:(
44
)
1844
-
214500
Australia :KUBOTAAUSTRALIAPTYLTD.
25
-
29
PermasWay,Truɡanina,VIC
3029
,Australia
Telephone:(
61
)-
3
-
9394
-
4400
Malaysia :KUBOTAMALAYSIASDN.BHD.
No.
3
JalanSepadu
25
/
123
TamanPerindustrianAxis,
Seksyen
25
,
40400
ShahAlam,SelanɡorDarulEhsanMalaysia
Telephone:(
60
)
3
-
736
-
1388
Philippines :KUBOTAPHILIPPINES,INC.
232
QuirinoHiɡhway,Baesa,QuezonCity
1106
,Philippines
Telephone:(
63
)
2
-
422
-
3500
Indonesia :P.T.KUBOTAINDONESIA
TamanIndustriBukitSemaranɡBaru(BSB)BlokD.
1
Kav.
8
, Kel. Jatibaranɡ-
Kec.Mijen,Semaranɡ,Indonesia
Telephone:(
62
)-
24
-
7472849
Japan :KUBOTACorporation
EnɡineExportDept.
2
-
47
,Shikitsuhiɡashi
1
-chome,Naniwa-ku,Osaka,Japan
556
-
8601
Telephone:(
81
)
6
-
6648
-
2155
Fax:(
81
)
6
-
6648
-
3521
OPERATOR'S MANUAL
KUBOTA LIQUID COOLED GASOLINE
/
LPG ENGINE
MANUEL DE L'OPERATEUR
MOTEUR À ESSENCE
/
LPG REFROIDI PAR LIQUIDE DE KUBOTA
BEDIENUNGSANLEITUNG
FLÜSSIGKEITSGEKÜHLTER BENZIN-
/
LPG-MOTOR VON KUBOTA
MANUALE DELL'OPERATORE
MOTORE KUBOTA A BENZINA
/
LPG CON RAFFREDDAMENTO A LIQUID
O
MANUAL DE INSTRUCCIONES
MOTOR KUBOTA DE GASOLINA
/
LPG REFRIGERADO POR LÍQUIDO
Code No. EG523-8917-5
WG1605-G-E3
WG1605-L-E 3
WG1605-GL-E3
WG1605-N-E3
WG1605-LN-E3
WG1903-G-E3
WG1903-L-E 3
WG1903-GL-E3
WG1903-N-E3
WG1903-LN-E3
WG2503-G-E3
WG2503-L-E 3
WG2503-GL-E3
WG2503-N-E3
WG2503-LN-E3
WG3800-G-E3
WG3800-L-E 3
WG3800-GL-E3
WG3800-N-E3
WG3800-LN-E3
WG3800-L-E5
WG3800-N-E5
1BGAAAIAP0020 1BGAAAIAP0540 1BGAAAIAP0220 1BGAAAIAP0440
1910-0614
READ AND SAVE THIS BOOK
MANUEL A LIRE ET A CONSERVER
DIESE ANLEITUNG BITTE SORGFÄLTIG DURCHLESEN
UND GRIFFBEREIT AUFBEWAHREN
LEGGETE E CONSERVATE QUESTO MANUALE
LEAN Y CONSERVEN ESTE MANUAL

Table of Contents

Questions and Answers

  • Y
    ypetersonAug 18, 2025
    Why is it difficult to start my Kubota WG3800-GL-E3?
    • M
      Melissa KirbyAug 19, 2025
      Several factors can make it hard to start your Kubota Engine. It could be due to fuel not flowing, which means you should check the fuel tank, fuel filter, fuel hoses, and fuel pump. Clean the filter if it contains water or foreign matter. Other possible causes include incorrect valve clearance (adjust when the engine is cold), thick engine oil in cold weather (change the oil grade), a discharged battery (charge it, and in winter, remove, charge, and store indoors), a clogged air cleaner (clean or replace it), wet spark plug electrodes (dry them), a defective starter or main switch (repair or replace), a defective vaporizer or lock off valve (replace), low compression (replace worn parts like valves, rings, pistons, or liners), or a disconnection in the wire harness (check the harness).
  • H
    Heather LopezAug 22, 2025
    What to do if Kubota Engine suddenly stops?
    • C
      Calvin RivasAug 22, 2025
      If your Kubota Engine suddenly stops, there are several things to investigate. First, check the fuel tank to ensure you have enough fuel and inspect the fuel system for any air or leaks. Next, check the engine oil level using the oil level gauge and examine the lubricating oil system, replacing the oil filter cartridge if needed. A clogged air cleaner can also cause the engine to stop, so clean or replace it. Finally, check the wire harness for any disconnections.
  • J
    Joshua SotoAug 25, 2025
    Why Kubota WG3800-GL-E3 output is insufficient?
    • J
      jamesharrisonAug 26, 2025
      Insufficient output in your Kubota Engine can stem from several issues. Check the fuel system for any problems that might be causing insufficient fuel supply. Inspect the lubricating oil system for overheating of moving parts, ensuring the lubricating oil filter is working correctly and that bearing clearances are within factory specifications; replace the filter element if it's clogged. Other potential causes include insufficient compression (replace worn parts like valves, rings, pistons, and liners), incorrect valve clearance (adjust when the engine is cold), a dirty air cleaner (clean or replace it), or a defective spark plug or ignition coil (clean/replace the spark plug and replace the ignition coil).
  • S
    Sarah JordanAug 28, 2025
    Why is my Kubota Engine speed insufficient?
    • P
      Pamela CobbAug 28, 2025
      If your Kubota Engine speed is insufficient, start by inspecting the spark plug for defects and clean or replace it as needed. Other potential causes include a defective ignition coil or throttle body (replace them), a separated breather tube (attach it correctly), or an improper input signal to the ECU or disconnection (check the wire harness).
  • L
    leslie49Aug 31, 2025
    What to do if my Kubota WG3800-GL-E3 output is insufficient?
    • J
      Jonathan CarlsonAug 31, 2025
      If your Kubota Engine's output is insufficient, several issues could be the cause. Insufficient compression may be the problem, which can be resolved by replacing bad valves or worn rings, pistons, and liners. Also, check the fuel system for insufficient fuel. Overheating moving parts can also cause this problem, so inspect the lubricating oil system, ensure the lubricating oil filter is working correctly (replace if the filter element is deposited with impurities), and verify the bearing clearance is within factory specifications. Other potential causes are incorrect valve clearance (adjust when the engine is cold), a dirty air cleaner (clean or replace), a defective spark plug (clean or replace), or a defective ignition coil (replace).
  • H
    Heidi JosephSep 3, 2025
    What causes a Kubota WG3800-GL-E3 to overheat?
    • N
      Nancy MunozSep 3, 2025
      Several factors can cause a Kubota Engine to overheat. Check the engine oil level and replenish if insufficient. Inspect the fan belt for breakage or elongation, and change or adjust it as needed. Ensure the coolant level is sufficient and adjust the antifreeze concentration if it's excessive by adding water or changing to the specified mixing ratio. Clean any dust clogging the radiator net or fins. Also, check for corrosion inside the radiator or coolant flow route, cleaning or replacing parts as necessary. Other potential causes include defective components like the fan, radiator, radiator cap, thermostat, or temperature sensor (replace as needed), running with an overload (reduce the load), or a defective head gasket with water leakage (replace parts).
  • B
    Betty DavisSep 5, 2025
    What causes excessive black exhaust gas in a Kubota WG3800-GL-E3 Engine?
    • N
      nbellSep 6, 2025
      Excessive black exhaust gas in a Kubota Engine can be attributed to a bad fuel system or fuel of extremely poor quality. Check the fuel system and replace the fuel if it is poor quality.
  • A
    Amy HayesSep 9, 2025
    What causes excessive lubricant oil consumption in Kubota WG3800-GL-E3 Engine?
    • W
      wwadeSep 9, 2025
      Excessive lubricant oil consumption in a Kubota Engine can be due to several reasons. Oil may be leaking from the oil seal, gasket, or other areas, in which case you should replace the leaking components. Other potential causes include a defective valve stem seal or worn/stuck piston rings and liners (replace).
  • G
    goodwinpamelaSep 12, 2025
    Why white exhaust gas is observed in Kubota Engine?
    • B
      Brenda BrownSep 12, 2025
      White exhaust gas in a Kubota Engine can be caused by excessive engine oil (reduce to the specified level), worn or stuck piston rings and liners, or a defective valve stem seal. Replace the affected components.
  • J
    Johnathan McphersonNov 15, 2025
    How to troubleshoot a Kubota WG3800-GL-E3 that is difficult to start?
    • J
      jenkinsmichaelNov 15, 2025
      If your Kubota Engine is hard to start, several factors could be the cause. Begin by checking the fuel tank, fuel filter, fuel hoses, and fuel pump for any issues that prevent fuel flow. Clean the fuel filter if it contains water or foreign matter. Also, inspect the air cleaner for clogs and clean or replace it as needed. Other potential causes include a discharged battery (charge or replace it), thick engine oil in cold weather (change the oil grade), incorrect valve clearance (adjust when the engine is cold), wet spark plug electrodes (dry and restart), low compression (replace worn parts like valves, rings, pistons, and liners), or defective components like the starter, main switch, vaporizer, or lock-off valve (repair or replace as necessary). Finally, check the wire harness for any di...

Summary

Foreword

Safety First

Explains safety symbols (DANGER, WARNING, CAUTION, IMPORTANT, NOTE) used in the manual.

Safe Operation

Observe Safety Instructions & PPE

Read manual, wear PPE, follow general safety rules for operation.

Pre-Operation Checks & Environment Safety

Checks before starting, clean environment, safe fuel handling.

Exhaust, Fire, and Fluid Safety

Prevent exhaust hazards, fire risks, and manage escaping fluids.

Burns, Battery, and Rotating Parts Safety

Precautions against burns, battery explosions, and rotating parts.

Fluid Disposal and Maintenance Safety

Safe anti-freeze handling, disposal, and maintenance procedures.

Servicing of the Engine

Pre-Operation Check

Break-in and Daily Checks

Procedures for initial engine break-in and daily pre-operation checks.

Operating the Engine

Starting the Engine Safely

Safety precautions and steps for starting the engine correctly.

Fuel Selection and Startup Sequence

Steps for selecting fuel type and initial startup procedures.

Stopping the Engine

Procedures for safely stopping the engine for different fuel types.

Checks During Operation and Emission System

Maintenance

General Safety for Maintenance

Essential safety rules for performing maintenance tasks.

Maintenance Service Intervals

Schedule of maintenance tasks based on operating hours.

Extended Service Intervals

Maintenance intervals for engine oil and oil filter for longer service.

Long-Term Service Intervals

Maintenance for spark plugs, air cleaners, and fuel systems.

Fuel System and Fan Belt Maintenance

Cooling System and Air Cleaner Maintenance

Periodic Service

Gasoline Fuel System Checks

LPG and Natural Gas Fuel System Checks

Checking and Adding Engine Oil

Changing Engine Oil

Replacing the Oil Filter Cartridge

Spark Plug Maintenance

Checking and Changing Coolant

Overheating Precautions and Coolant Checks

Anti-freeze Usage and Safety

Air Cleaner Maintenance

Electric Wiring and Fan Belt Adjustment

Troubleshooting

Engine Starting Issues

Symptoms, causes, and solutions for difficulty starting the engine.

Insufficient Output and Engine Speed Issues

Troubleshooting insufficient power, engine speed problems, and exhaust gas issues.

Engine Overheating Troubleshooting

Causes and countermeasures for engine overheating.

Kubota WG3800-GL-E3 Specifications

General IconGeneral
Engine ModelWG3800-GL-E3
Number of Cylinders4
Lubrication SystemForced Lubrication
Engine Type4-cycle, gasoline
Max Power Output11.0 HP (8.2 kW) at 3600 rpm
Max Torque19.5 Nm (2.0 kg·m) at 2500 rpm
Cooling SystemLiquid Cooled
Ignition SystemElectronic Ignition
Starting SystemElectric Start

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