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Section 7 — Exploded Views and Parts Lists
GT-990 Engine – Drawing No. 0G2963-G (Part 1)
ITEM PART NO. QTY. DESCRIPTION
1 0C5729 1 ASSY, CRANKCASE WITH SLEEVE
2 0E9843A 1 SEAL, 38 I.D. CRANKSHAFT GREEN
3 0G0919 7 SCREW, HHFCS M6-1.0 X 12 G8.8
4 0C5372 1 ASSEMBLY, BREATHER
5 0C3005 1 GASKET, BREATHER COVER
6 0E3372B 1 SEPARATOR, OIL BREATHER
7 0D8067A 1 ASSEMBLY, HEAD #1
8 071983 4 RETAINER, PISTON PIN 20
9 0G0693 1 ASSY, ROCKER COVER W/BARB
10 0D4788 1 PLUG,STD PIPE 3/8” STEEL SQ HEAD
11 0G2752 2 PISTON, DISH TOP DIA 90 COATED
12 0G2565 2 RING SET, PISTON DIA 90
13 0E1466 2 PIN PISTON
14 0D4041 1 ASSEMBLY, CAMSHAFT & GEAR
15 043790A 1 BARBED ELBOW, 90 DEG. 3/8NPT X
3/8 VS
16 093064 1 ASSEMBLY, OIL FILL CAP
17 0C2977 1 GASKET, CRANK CASE
18 0C5943 1 SEAL, OIL PASSAGE
19 0E3791E 1 ASSY, GTH-990 DIRECT DRIVE
20 0E3223 2 ASSEMBLY, CONNECTING ROD GT-990
21 0D2157 2 SCREW SHC M6-1.0 X 50 G8.8
22 0E6098 1 SCREEN, OIL PICKUP
23 0D4123B 1 ASSY,OIL PUMP GTH W/O O-RING
24 0E8152 1 O-RING, 0.49 ID X 0.07 THICK
25 0C3011 2 COVER, OIL RELIEF
26 0C3009 2 SPRING, OIL RELIEF
27 0C3010 2 BALL, 1/2D OIL RELIEF
28 093873 2 WASHER, LOCK RIB M6
29 0F5458 1 SCREW, PLASTITE HI-LOW #10
30 0C5998 1 CLAMP, OIL TUBE
32 0F2664E 1 ASSEMBLY, DIPSTICK GTH-990
PORTABLE
ITEM PART NO. QTY. DESCRIPTION
33 0D3745 1 TUBE, DIPSTICK
34 0C3027 1 O-RING, 3/8 X ½
35 0E9842A 1 SEAL, 42 I.D. CRANKSHAFT GREEN
36 0F8054 1 GEARCOVER / ADAPTOR GTH990/760
37 0C3006 10 SCREW, HHFC M10-1.5 X 55
38 080318 8 SCREW HHFC M6-1.0 X 25
39 0G1839 2 LIFT HOOK, GT990/760
40 0D2723D 1 COVER, ROCKER W/OIL FILL
“GENERAC” TEXT
41 0C2979 2 GASKET, VALVE COVER
42 086515 8 KEEPER, VALVE SPRING
43 0D2274 4 RETAINER, VALVE SPRING
44 0D3867 4 SPRING, VALVE
45 078672 2 SEAL, VALVE STEM D7
46 0C5371 4 WASHER, VALVE SPRING
47 072694 4 STUD, ROCKER ARM PIVOT
49 0D5313 4 ROCKER ARM
50 0D3998 4 NUT, HEX M8-1.0 GB YELLOW CHROM
51 0D6024 2 PLATE, PUSH ROD GUIDE
52 0C2976 12 SCREW HHFC M8-1.25 X 65
53 086516 2 VALVE, EXHAUST
54 0C2229 2 VALVE, INTAKE
55 083897 4 TAPPET, SOLID
56 0D8067B 1 ASSEMBLY, HEAD #2
57 0D9853D 4 PUSHROD 147
58 0C2978 2 GASKET, HEAD
60 0D6008 1 KIT GEAR COVER
61 0D4010 1 KIT GASKET
62 0D6007 1 KIT PISTON & RINGS
63 0D4012 1 KIT BREATHER ASSEMBLY
64 0D8675A 1 KIT HEAD ASSEMBLY CYLINDER 1
65 0D8675B 1 KIT HEAD ASSEMBLY CYLINDER 2
66 0D4015 1 KIT OIL RELIEF