The Generac GT990 engine line groups 2 variant designations. Parts and fitment are pooled here so a cross-reference found on one variant surfaces for the whole family.
| Part # | Description | Category |
|---|---|---|
| 0C3040 | PRE-CLEANER | Air filter |
| 0C8127 | ELEMENT AIR CLEANER | Air filter |
| 0D3262 | AIR FILTER ELEMENT | Air filter |
| 0D4511 | PRECLEANER, AIR | Air filter |
| 0D9723 | ELEMENT, AIR FILTER | Air filter |
| 100-025 | Air Filter | Air filter |
| C8127 | Engine Air Cleaner/Air Filter | Air filter |
| 083049 | REGULATOR VOLTAGE | Avr |
| 0F9719 | ASSY PCB VREG AIR COOLED | Avr |
| 0C1112 | BELT,V-RIB 4LX42.5" | Belt |
| 066386 | ASSEMBLY, BRUSH HOLDER | Brush |
| 0D6313 | FILTER, FUEL | Fuel filter |
| 021713B | CYLINDER HEAD GASKET | Gasket |
| 076701 | CRANKCASE GASKET | Gasket |
| 090239 | GASKET, EXHAUST MANIFOLD | Gasket |
| 0C2977 | GASKET, CRANK CASE | Gasket |
| 0C2978 | GASKET, HEAD | Gasket |
| 0C2979 | GASKET, VALVE COVER | Gasket |
| 0C3005 | GASKET, BREATHER COVER | Gasket |
| 0C3043 | GASKET, MANIFOLD / PORT | Gasket |
| 0C3150 | ROCKER COVER GASKET | Gasket |
| 0C4138 | GASKET, EXHAUST PORT | Gasket |
| 0C4647 | GASKET, SOLENOID | Gasket |
| 0C6069 | GASKET, DIAPHRAGM | Gasket |
| 0D2559 | GASKET, ALTERNATOR AIR DUCT | Gasket |
| 0D4010 | KIT GASKET | Gasket |
| 0D4023 | GASKET, MANIFOLD TO CARB (GT-990) | Gasket |
| 0D4024 | GASKET, CARB TO SPACER | Gasket |
| 0D4026 | GASKET, CARB TO SPACER (GT-990) | Gasket |
| 0D5282 | GASKET, MANIFOLD TO CARBURETOR | Gasket |
| 0D6327 | GASKET, SPITBACK | Gasket |
| 0E0572 | GASKET,CARB TO INTAKE MANIFOLD | Gasket |
| 0E0573 | GASKET,CARB TO ADAPTOR | Gasket |
| 0E1078A | GASKET, EXHAUST BASE | Gasket |
| 030340 | Hose, Fuel, 4.5" LG. | Hose |
| 048031C | CLAMP HOSE BAND 1/4 | Hose |
| 0C3036 | HOSE, BREATHER | Hose |
| 0C3036A | HOSE, BREATHER | Hose |
| 0C9093 | HOSE, BREATHER | Hose |
| 0C9093A | HOSE, BREATHER | Hose |
| 0C9806 | HOSE, 3/8 I.D. X 6 LONG | Hose |
| 0D3083 | ASSEMBLY, OIL DRAIN HOSE | Hose |
| 0E5079 | HOSE, BREATHER | Hose |
| 0F7065 | 3 FT HOSE RES 1/2 | Hose |
| 0F9176 | HOSE 1/4 ID | Hose |
| 070185 | FILTER, OIL | Oil filter |
| 070185B | FILTER, OIL | Oil filter |
| 070185F | Oil Filter | Oil filter |
| 100-030 | Oil Filter | Oil filter |
| 70185 | FILTER, OIL | Oil filter |
| 021533 | SET, PISTON RING 90MM | Service part / kit |
| 022097 | WASHER LOCK M6-1/4 | Service part / kit |
| 022473 | WASHER FLAT 1/4-M6 ZINC | Service part / kit |
| 022676 | FUSE AGC-15A. | Service part / kit |
| 028578 | FUSE 10A X AGC10 | Service part / kit |
| 031971 | BEARING #6205 2NSE C3 E SRI2 S | Service part / kit |
| 043790A | BARBED EL 90 3/8NPT X 3/8 VS | Service part / kit |
| 049721 | SCREW HHC M6-1.0 X 35 G8.8 BLK | Service part / kit |
| 052857 | NUT LOCK FLANGE M6-1.0 | Service part / kit |
| 0536210209 | ASSEMBLY, WIRE | Service part / kit |
| 056482 | BEARING | Service part / kit |
| 066849B | SCREW HHTT M5-0.8 X 8mm | Service part / kit |
| 071980 | PIN PISTON D20 | Service part / kit |
| 071983 | RETAINER, PISTON PIN 20 | Service part / kit |
| 072694 | STUD, ROCKER ARM PIVOT | Service part / kit |
| 073159 | BEARING | Service part / kit |
| 073590A | FUSE 5A X BUSS | Service part / kit |
| 073591 | FUSE HOLDER | Service part / kit |
| 074908 | SCREW HHTT M5-0.8 X 10 BP | Service part / kit |
| 078699E | SLEEVE, SEAMED DOWEL 10 DIA. | Service part / kit |
| 083897 | TAPPET, SOLID | Service part / kit |
| 086515 | KEEPER, VALVE SPRING | Service part / kit |
| 086516 | VALVE, EXHAUST | Service part / kit |
| 087680 | NUT WING M6-1.0 | Service part / kit |
| 090388 | SCREW HHTT M6-1.0 X 12 ZINC | Service part / kit |
| 093064 | ASSEMBLY, OIL FILL CAP | Service part / kit |
| 093873 | WASHER, LOCK RIB M6 | Service part / kit |
| 099727 | FUSE 5A X AGC5 | Service part / kit |
| 0A1801 | ASSEMBLY, BATTERY CHARGER ENGINE | Service part / kit |
| 0A9611 | FUSE 7.5A | Service part / kit |
| 0C2229 | VALVE, INTAKE | Service part / kit |
| 0C2237 | XFRSW HSB 100A 2P 250V | Service part / kit |
| 0C2967 | PISTON, LC | Service part / kit |
| 0C2969 | ASSEMBLY, CONNECTING ROD (GT-990) | Service part / kit |
| 0C2976 | SCREW HHFC M8-1.25 X 65 | Service part / kit |
| 0C2981 | ROCKER, COVER | Service part / kit |
| 0C3003 | SEPARATOR, OIL BREATHER | Service part / kit |
| 0C3006 | SCREW, HHFC M10-1.5 X 55 | Service part / kit |
| 0C3009 | SPRING, OIL RELIEF | Service part / kit |
| 0C3010 | BALL, 1/2D OIL RELIEF | Service part / kit |
| 0C3011 | COVER, OIL RELIEF | Service part / kit |
| 0C3026 | COOLER, OIL | Service part / kit |
| 0C4680 | PLUNGER, LP REGULATOR ASSEMBLY | Service part / kit |
| 0C4706 | DIAPHRAGM, TWIN REGULATOR | Service part / kit |
| 0C4739 | SCREW PPHM M3-0.5 X 6 | Service part / kit |
| 0C5313 | SCREEN, OIL PICKUP | Service part / kit |
| 0C5315 | GEROTOR, OUTER | Service part / kit |
| 0C5371 | WASHER, VALVE SPRING | Service part / kit |
| 0C5372 | ASSEMBLY, BREATHER | Service part / kit |
| 0C5729 | ASSEMBLY, CRANKCASE HOUSING WITH SLEEVE | Service part / kit |
| 0C5731 | ASSEMBLY, HOUSING COVER WITH SLEEVE | Service part / kit |
| 0C5760A | JET, GN 410 ENGINE LP (7KW) | Service part / kit |
| 0C5760G | JET, GT990 NAT GAS | Service part / kit |
| 0C5760J | JET, GN 410 ENGINE LP | Service part / kit |
| 0C5764 | SPRING, REGULATOR | Service part / kit |
| 0C5765 | SOLENOID, TWIN REGULATOR | Service part / kit |
| 0C6070 | SPRING-SOLENOID PLUNGER | Service part / kit |
| 0C8526 | CARBURETOR (GT-990) | Service part / kit |
| 0C8566 | SCREW HHFC M6-1.0 X 20 G8.8 | Service part / kit |
| 0C8808 | HOOK, LIFTING | Service part / kit |
| 0D2157 | SCREW SHC M6-1.0 X 50 C8.8 | Service part / kit |
| 0D2274 | RETAINER, VALVE SPRING | Service part / kit |
| 0D2774B | BASE, AIRBOX | Service part / kit |
| 0D2775 | COVER, AIRBOX | Service part / kit |
| 0D2930 | VALVE, SUMMER / WINTER | Service part / kit |
| 0D3867 | SPRING, VALVE | Service part / kit |
| 0D3998 | NUT HEX M8-1.0 G8 YEL CHR | Service part / kit |
| 0D4012 | KIT BREATHER ASSEMBLY | Service part / kit |
| 0D4015 | KIT OIL RELIEF | Service part / kit |
| 0D4040E | ASSEMBLY, CRANKSHAFT HORIZONTAL DIRECT DRIVE (GT-990) | Service part / kit |
| 0D4041 | ASSEMBLY, CAMSHAFT & GEAR | Service part / kit |
| 0D4183 | ADAPTOR, SPIT BACK | Service part / kit |
| 0D4522 | CONTROLLER ASSEMBLY | Service part / kit |
| 0D4570 | CAP, FUEL WITH GAUGE & VENT | Service part / kit |
| 0D4575 | BATTERY U1 | Service part / kit |
| 0D4612 | SNORKEL, AIR INTAKE | Service part / kit |
| 0D4788 | PLUG STD PIPE 3/8 STEEL SQ HD | Service part / kit |
| 0D5014A | KNOB, AIRBOX 17mm | Service part / kit |
| 0D5014B | KNOB, AIRBOX 95MM | Service part / kit |
| 0D5125 | SPRING, WINTER/SUMMER VALVE | Service part / kit |
| 0D5133 | SCREEN, SPARK ARRESTOR | Service part / kit |
| 0D5269 | ROCKER, COVER | Service part / kit |
| 0D5313 | ROCKER ARM | Service part / kit |
| 0D5698A | JET IDLE PRIMER PHILLIPS HD | Service part / kit |
| 0D6007 | KIT PISTON & RINGS | Service part / kit |
| 0D6008 | KIT GEAR COVER | Service part / kit |
| 0D6020 | STUD M6-1.0 X 73 | Service part / kit |
| 0D6021 | STUD, METRIC | Service part / kit |
| 0D6024 | PLATE, PUSH ROD GUIDE | Service part / kit |
| 0D6143 | TUBE, HEAT RISER 50.8 I.D. | Service part / kit |
| 0D8067A | ASSEMBLY, HEAD #1 | Service part / kit |
| 0D8067B | ASSEMBLY, HEAD #2 | Service part / kit |
| 0D8675A | KIT HEAD ASSEMBLY CYLINDER 1 | Service part / kit |
| 0D8675B | KIT HEAD ASSEMBLY CYLINDER 2 | Service part / kit |
| 0D9852 | ASSEMBLY IGNITION COIL | Service part / kit |
| 0D9853D | PUSHROD 144.6 | Service part / kit |
| 0E1010A | JET, GT990 LP GAS | Service part / kit |
| 0E3372B | SEPARATOR, OIL BREATHER | Service part / kit |
| 0F1338A | ASSY, IGN COIL W/DIODE NO ADV | Service part / kit |
| 0F1338B | ASSY, IGN COIL W/DIODE NO ADV | Service part / kit |
| 0F5022 | SOLENOID COIL, 12VDC | Service part / kit |
| 0F9035 | CARBURETOR (GT-990) | Service part / kit |
| 0C2995 | GEROTOR, INNER | Pump |
| 0C2996 | GEROTOR, OUTER | Pump |
| 0D4123 | ASSEMBLY, OIL PUMP | Pump |
| 0D4123A | ASSEMBLY, OIL PUMP | Pump |
| 0F6263 | Impulse pump | Pump |
| 072655 | SEAL, 35 I.D. CRANKSHAFT | Seal |
| 078672 | SEAL, VALVE STEM D7 | Seal |
| 097934 | O-RING, CHECK VALVE | Seal |
| 0C2993 | SEAL, GOVERNOR SHAFT | Seal |
| 0C3007 | SEAL, 42 I.D. CRANKSHAFT | Seal |
| 0C3008 | SEAL, 38 I.D. CRANKSHAFT | Seal |
| 0C5943 | SEAL, OIL PASSAGE | Seal |
| 0C6066 | SEAL, INLET REGULATOR | Seal |
| 0CL3007 | SEAL, 42 I.D. CRANKSHAFT | Seal |
| 0E6884 | SEAL, ALTERNATOR SHAFT | Seal |
| 0E9842 | SEAL, 42 I.D. CRANKSHAFT | Seal |
| 0E9843 | SEAL, 38 I.D. CRANKSHAFT | Seal |
| 075281 | SWITCH, HIGH TEMPERATURE | Sensor |
| 099236 | Switch Oil Pressure Switch 8 PSI 1 Pole | Sensor |
| 0A8584 | Switch | Sensor |
| 0C3025 | SWITCH, OIL PRESS | Sensor |
| 0E1497 | SWITCH, OIL HIGH TEMP | Sensor |
| 072347 | SPARK PLUG | Spark plug |
| 0D4529 | SPARKPLUG | Spark plug |
| 0E7585 | SPARK PLUG | Spark plug |
| RC12YC | Spark Plug | Spark plug |
| RC14YC | Recommended Spark Plug | Spark plug |
Parts cataloged across all variants of this engine family — verify the exact part fits your specific variant and serial number before ordering.
Leads compiled from supplier catalogs across the family’s variants; verify the exact part for your variant and serial number.