Generac Power Systems GN190H Service And Repair Manual page 13

7. Replace the spark plug. Use a Champion RC12YC (or
equivalent) spark plug.
a. Set spark plug gap to 0.030 inch (0.76mm).
b. Install new plug, tighten to 13 ft-lbs (156 in-lbs).
c. If torque wrench is not available, tighten plug with fin-
gers. Then, tighten NEW plug 1/2 turn further; or USED
plug 1/4 turn further.
ITEM DESCRIPTION
1 Control Rod Assembly
2 Piston Pin
3 Piston Ring Set
4 Gear Cover Assembly
5 M8 x 52mm Head Bolt
6 Piston
7 Pin Retainer Ring
8 Crankshaft Assm.
9 Governor "R" Pin
10 Gov. Arm Thrust Washer
11 Crankcase Assembly.
11B Crankcase Assembly.
12 Governor Arm
13 Oil Seal
14 Governor Gear Assembly
15 Governor Gear C-Ring
16 Governor Spool
17 1/8" NPT Pipe Plug
18 Camshaft Assembly
19 Crankcase Gasket
20 Valve Stem Seal
21 Cylinder Head Gasket
22 Oil Pressure Relief Cover
23 Oil Pressure Spring
24 11/32" Ball
Figure 1.4 — Exploded View — Typical Horizontal Shaft Long Block
QTY
8. Check that ignition wires are free of breaks and abrasions
and are properly routed.
9. Install the blower housing.
10. Run engine and adjust engine speed.
ITEM DESCRIPTION
1 25 M5 Form Screw
1 26 M6-1.0 x 12mm Screw
1 27 Gov. Gear Thrust Washer
1 28 M8-1.25 x 35mm Screw
5 29 Spring Washer
1 30 Valve Spring Retainer
2 31 Valve Spring
1 32 Valve Spring Wear Washer
1 33 Geroter Set
1 34 "O" Ring
1 36 Cylinder Head Assembly
1 37 Exhaust Valve
1 38 Intake Valve
2 39 Push Rod
1 40 Tappet
1 41 Oil Pick-up Assembly
1 42 Rocker Cover Gasket
1 43 Pivot Ball Stud
1 44 GN-190/220 Rocker Arm
1 45 Rocker Arm Jam Nut
1 46 Push Rod Guide Plate
1 47 1/4" NPT Pipe Plug
1 48 Rocker Cover Assembly
1 49 Plastic Oil Fill Plug
1
11
SECTION 1: GENERAL
QTY
1
4
1
6
1
2
2
2
1
1
1
1
1
2
2
1
1
2
2
2
1
2
1
1