Engine specifications, Part 8- specifications & charts – Generac Power Systems NP-40G User Manual
Page 121
Attention! The text in this document has been recognized automatically. To view the original document, you can use the "Original mode".
PART 8- SPECIFICATIONS & CHARTS
Engine Specifications
GENERAL:
MODEL NUMBER
GN-190
GN-220
BORE
STROKE
DISPLACEMENT
2.76 Inches f70mm)
1.93 Inches (49mm)
190CC
2.95 Inches (75mm)
1.93 Inches (49mm)
216.5CC
VALVE TRAIN:
VALVE SEAT WIDTH
AND ANGLE:
Design Width
Wear Limit
Grind Seats to Valve
Seat Angle
0.034-0.044 inch (0.87-1.13mm)
0.064 Inch (1.63mm) maximum)
0.040 Inch (1.00mm) width
0.034-0.044 Inch (0.87-1.13mm)
0.064 Inch (1.63mm) maximum
0.040 inch (1.00mm) width
VALVE MARGIN:
Design Margin
Wear Limit
0.058-0.060 inch (1.48-1.52mm)
0.039 (0.98mm) Inch maximum
0.034-0.044 Inch (0.87-1.13mm)
0.020 Inch (0.50mm) maximum
INTAKE VALVE STEM
DIAMETER:
Design Diameter
Wear Limit
0.215-0.216 Inch (5.465-5.480mm)
0.214 Inch (5.435mm) Minimum
0.274-0.275 Inch (6.965-6.980mm)
0.273 inch (6.934mm) Minimum
EXHAUST VALVE STEM
DIAMETER:
Design Diameter
Wear Limit
0.214-0.215 Inch (5.445-5.460mm)
0.213 Inch (5.415mm) Minimum
0.273-0.274 Inches (6.945-6.960mm)
0.272 Inch (6.909mm) Minimum
TAPPET DIAMETER
(INTAKE & EXHAUST):
Design Diameter
Wear Limit
0.294-0.295 inch (7.461-7.475mm)
0.293 Inch (7.431mm) Minimum
0.293-0.294 Inch (7.457-7.475mm)
0.292 inch (7.417mm) Minimum
VALVE SPRINGS:
Free Length
Force needed to compress
spring to 1.39 Inch (35.2mm)
1.910 Inch (48.48mm)
14.8-16.3 lbs
(6.7-7.4kg)
2.074 Inch (52.69mm)
21.8-19.8 lbs
(9.9-9.0 kg)
VALVE CLEARANCE:
Intake
Exhaust
0.001-0.003 Inch (0.03-0.07mm)
0.001-0.003 inch (0.03-0.07mm)
0.001-0.0022 Inch (0.03-0.056mm)
0.0018-0.003 Inch (0.046-0.07mm)
VALVE GUIDES:
Design Diameter
Wear Limit
0.216-=0.217 Inch (5.505-5.520mm)
0.218 inch (5.54mm) maximum
0.237-0.2364 inch (6.02-6.005mm)
0.238 inch (6.045mm) maximum
CRANKCASE ASSEMBLY:
CYLINDER BORE:
Design Diameter
Wear Limit
2.756-2.757 Inch (70.000-70.025mm)
2.760 inch (70.105mm)
2.953-2.954 Inch (75.000-75.025mm)
2.957 Inch (75.108mm)
VALVE TAPPET BORE:
Design Diameter
Wear Limit
0.295-0.296 Inch (7.494-7.520mm)
0.297 inch (7.55mm)
0.295-0.296 Inch (7.494-7.520mm)
0.297 Inch (7.55mm)
Page 8-4