459cc Gasoline EFI G19 Portable Generator
Instruction Manual 
459cc Gasoline EFI (G19)
Portable Generator
Engine Parts Manual
Engine: A0000310667
WARNING CANCER AND REPRODUCTIVE HARM
www.P65Warntngs.ca.gov.
(000393a)
459cc Gasoline EFI G19 Portable Generator
The information in this manual is known to be accurate as of the date of release shown on the cover. However. engineering changes can occur without notice. To obtain the proper parts. be sure to use the serial number of the unit being serviced when ordering from this manual. Always refer to any part notes and changes before ordering. All other parts not shown in the manual can be found on Generac’s exploded view drawings at www.generec.com or by contacting your local authorized dealer.
www.generac.com 1-888-GENERAC (1-888-436-3722) 
| QUICK REFERENCE GUIDE | ||
| Engine Size | Fuel | Engine Part No. |
| 459cc | GASOLINE | A0000310667 |
| QUICK REFERENCE PARTS | ||
| Description | Part No. | Special Notes |
| Air Filter Element | A0000921093 | |
| Spark Plug | OK20670117 | |
| Item | Part No. | Description | Qty. |
| 1 | 10000026946 | FLANGE BOLT (M6X2OMM) | 11 |
| 2 | 10000026935 | CYLINDER TEMPERATURE SENSOR | 1 |
| 3 | 10000026967 | VALVE COVER | 1 |
| 4 | A0000921091 | BREATHER TUBE | 1 |
| 5 | 10000026981 | BREATHER PLATE GASKET | 1 |
| 6 | 10000027001 | BREATHER PLATE ASSEMBLY | 1 |
| 7 | 10000026993 | FLANGE BOLT (M6X8MM) | 7 |
| 8 | 10000027002 | VALVE COVER GASKET | 1 |
| 9 | 0G84420211 | FLANGED HEAD BOLT (M10X8OMM) | 4 |
| 10 | 0G84420210 | EXHAUST STUD BOLT (M8X34MM) | 2 |
| 11 | 10000026975 | EXHAUST GASKET | 1 |
| 12 | 10000026982 | EXHAUST MANIFOLD | 1 |
| 13 | 0J35220161 | HEX NUT (M8) | 2 |
| 14 | OK20670117 | SPARK PLUG | 1 |
| 15 | 10000026954 | VALVE ROCKER SHAFT | 2 |
| 16 | 10000026939 | ROCKER ARM ASSEMBLY | 2 |
| 17 | 0G84420122 | VALVE ROTATOR | 2 |
| 18 | 0G84420239 | VALVE KEEPER | 4 |
| 19 | 0G84420123 | VALVE SPRING RETAINER | 2 |
| 20 | 0G84420124 | VALVE SPRING | 2 |
| 21 | 0G84420125 | VALVE SPRING SEAT | 1 |
| 22 | 0G84420128 | VALVE STEM SEAL | 1 |
| 23 | 0J39430126 | VALVE KIT- INTAKE AND EXHAUST VALVE | 1 |
| 24 | OH58410163 | FLANGE BOLT (M6X12MM) | 8 |
| 25 | 10000027004 | SHROUD | 1 |
| 26 | ORDER ITEM 87 | CYLINDER HEAD | 1 |
| 27 | 10000026995 | SHROUD | 1 |
| 28 | OK0090 | INTAKE STUD BOLT (M6/8X110MM) | 2 |
| 29 | 0G84420144 | CARBURETOR GASKET | 1 |
| 30 | 0J25910112 | CARBURETOR INSULATOR | 1 |
| 31 | 0G9916 | CARBURETOR GASKET | 1 |
| 32 | A0000310669 | ASSEMBLY-THROTTLE BODY/ECU | 1 |
| 33 | 0G84420156 | CARBURETOR GASKET | 1 |
| 34 | A0000921092 | ASSEMBLY, AIR CLEANER | 1 |
| 35 | 10000021871 | FLANGE NUT (M6) | 2 |
| 36 | 10000027005 | CYLINDER HEAD GASKET | 1 |
| 37 | 0G84420212 | DOWEL PIN | 2 |
| 38 | N/A | PISTON RING SET | 1 |
| 39 | N/A | PISTON PIN CIRCLIP | 2 |
| 40 | N/A | PISTON | 1 |
| 41 | N/A | PISTON PIN | 1 |
| 42 | N/A | ASSEMBLY CONNECTING ROD | 1 |
| 43 | 10000027012 | PUSHROD | 2 |
| 44 | 0G84420174 | VALVE LIFTER | 2 |
| 45 | N/A | ASSEMBLY, CAMSHAFT | 1 |
| 46 | A0000921550 | ASSEMBLY, OIL PUMP | 1 |
| 47 | ORDER ITEM 46 | C-CLIP | 1 |
| 48 | ORDER ITEM 46 | GEAR, OIL PUMP DRIVEN | 1 |
| 49 | ORDER ITEM 46 | COVER, OIL PUMP | 1 |
| 50 | ORDER ITEM 46 | ROTOR, INTERNAL | 1 |
| 51 | ORDER ITEM 46 | ROTOR, EXTERNAL | 1 |
| 52 | ORDER ITEM 46 | DRIVE PIN, OIL PUMP | 1 |
| 53 | ORDER ITEM 46 | DRIVE SPINDLE, OIL PUMP | 1 |
| 54 | N/A | DOWEL PIN | 2 |
| 55 | N/A | 0-RING | 1 |
| 56 | 0G84420229 | BOLT, FLANGE (M8X40) | 7 |
| 57 | 0G84420116 | SEAL, OIL | 2 |
| 58 | N/A | COVER, CRANKCASE | 1 |
| 59 | 01-158410158 | ALARM, OIL LEVEL | 1 |
| 60 | 10000027013 | FILTER, OIL | 1 |
| 61 | N/A | BALL, FRICTION | 1 |
| 62 | N/A | SPRING, FRICTION | 1 |
| 63 | 10000026984 | GASKET, CRANKCASE COVER | 1 |
| 64 | N/A | SHAFT, BALANCE | 1 |
| 65 | N/A | ASSEMBLY, CRANKSHAFT | 1 |
| 66 | 0G84420228 | DOWEL PIN | 2 |
| 67 | A0000347482 | RECTIFIER, BATTERY CHARGER | 1 |
| 68 | 10000026977 | 0-RING | 1 |
| 69 | 10000027008 | CAP ASSEMBLY, OIL FILLER | 1 |
| 70 | 10000026956 | BOLT, FLANGE (M8X5OMM) | 2 |
| 71 | 10000026985 | MOTOR, STARTER | 1 |
| 72 | 01-158410174 | PIN, DOWEL | 2 |
| 73 | N/A | CRANK CASE | 1 |
| 74 | 0G84420110 | BOLT, DRAIN PLUG | 1 |
| 75 | OG84420109 | WASH ER | 1 |
| 76 | 10000027014 | CLAMP, WIRE | 1 |
| 77 | 10000027009 | COIL, CHARGING | 1 |
| 78 | 10000026986 | BOLT, FLANGE (M6X3OMM) | 2 |
| 79 | 10000026987 | COIL ASSEMBLY, IGNITION | 1 |
| 80 | 10000027024 | FLYWHEEL ASSEMBLY | 1 |
| 81 | 10000027026 | FAN, COOLING | 1 |
| 82 | 10000026988 | PULLEY, STARTER | 1 |
| 83 | 0G84420149 | NUT, FLANGE (M16) | 1 |
| 84 | 0J35220172 | CLIPS, CABLE | 2 |
| 85 | 10000026957 | ASSEMBLY, RECOIUW BLOWER HOUSING | 1 |
| 86 | 10000026989 | HARNESS, WIRE | 1 |
| 87 | A0000706673 | ASSEMBLY, CYLINDER HEAD | 1 |
| 88 | ORDER ITEM 88 | COVER, AIR FILTER BOTTOM | 1 |
| 89 | ORDER ITEM 88 | SEAL, AIR FILTER COVER | 1 |
| 90 | ORDER ITEM 88 | FRAME, FILTER CORE | 1 |
| 91 | OH3535 | NUT, HEXAGON FLANGE | 6 |
| 92 | A0000921093 | ELEMENT, AIR FILTER | 2 |
| 93 | ORDER ITEM 88 | COVER, AIR FILTER TOP | 1 |
| 94 | 10000027071 | HOUSING, BLOWER | 1 |
| 95 | 10000027054 | RECOIL ASSEMBLY | 1 |
| 96 | A0000706976 | BOLT, FLANGED (M5X8MM) | 4 |
N/A – ITEMS NOT SERVICED
Part No. A0000318956
Rev. A 07/20/2020
©2020 Generac Power Systems, Inc.
All rights reserved.
Specifications are subject to change without notice.
No reproduction allowed in any form without prior written consent from Generac Power Systems, Inc.
Generac Power Systems, Inc.
S45 W29290 Hwy. 59
Waukesha, WI 53189
1-888-GENERAC (1-888-436-3722)
www.generac.com
Generac Power Systems - Power Equipment and Generator Manufacturer
P65Warnings.ca.gov
