Part 8- specifications & charts, Engine specifications (continued) – Generac Power Systems NP-40G User Manual
Page 123
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Part 8- SPECIFICATIONS & CHARTS
Engine Specifications (Continued)
MODEL NO.
GN-190
GN-220
CONNECTING ROD ASSEMBLY (CONTD);
SMALL END INSIDE
DIAMETER:
Design Diameter
Wear Limit
0.709^).710 Inch (18.02-18.03mm)
0.711 Inch (18.05mm) Maximum
0.709-0.710 Inch (18.02-18.03mm)
0.711 Inch (18.05mm) Maximum
PISTON PIN OUTSIDE
DIAMETER:
Design Diameter
Wear Limit
0.708-0.709 inch (17.989-18.000mm)
0.707 Inch (17.969mm) Minimum
0.708-0.709 inch (17.989-18.000mm)
0.707 inch (17.969mm) Minimum
PISTON PIN LENGTH:
Design Length
Wear Limit
2.196-2.213 inch (55.8-56.2mm)
2.193 inch (55.7mm) Minimum
2.196-2.213 Inch (55.8-56.2mm)
2.193 inch (55.7mm) Minimum
PISTON:
PISTON MAJOR
DIAMETER:
Design Diameter
Wear Limit
2.753-2.754 inch (69.939-69.959mm)
2.751 Inch (69.89mm) Minimum
2.753-2.754 Inch (69.939-69.959mm)
2.751 Inch (69.89mm) Minimum
PISTON MINOR
DIAMETER:
Design Diameter
Wear Limit
2.747-2.748 inch (69.789-69.809mm)
2.745 Inch (69.739mm) Minimum
2.747-2.748 Inch (69.789-69.809mm)
2.745 inch (69.739mm) Minimum
WRIST PIN BORE
DIAMETER:
Design Diameter
Wear Limit
0.708-0.709 Inch (18.000-18.011mm)
0.710 Inch (18.026mm) Maximum
0.708-0.709 inch (18.000-18.011mm)
0.710 inch (18.026mm) Maximum
TOP RING GROOVE WIDTH
Design Width
Wear Limit
0.059-0.061 Inch (1.52-1.54mm)
0.062 Inch (1.57mm) Maximum
0.059-0.061 Inch (1.52-1.54mm)
0.062 inch (1.57mm) Maximum
SECOND RING GROOVE
WIDTH:
Design Width
Wear Limit
0.059-0.061 inch (1.52-1.54mm)
0.062 inch (1.57mm) Maximum
0.059-0.061 Inch (1.52-1.54mm)
0.062 inch (1.57mm) Maximum
OIL CONTROL RING
GROOVE WIDTH:
Design Width
Wear Limit
0.118-0.119 Inch (3.01-3.03mm)
0.120 inch (3.06mm) Maximum
0.118-0.119 Inch (3.01-3.03mm)
TOP RING WIDTH:
Design Width
Wear Limit
0.057-0.059 inch (1.47-1.49mm)
0.056 Inch (1.44mm) Minimum
0.057-0.059 Inch (1.47-1.49mm)
0.056 inch (1.44mm) Minimum
TOP RING END GAP*:
Design End Gap
Wear Limit
0.005-0.016 inch (0.15-0.40mm)
0.024 Inch (0.60mm) Maximum
0.005-0.016 inch (0.15-0.40mm)
0.024 Inch (0.60mm) Maximum
SECOND RING WIDTH:
Design Width
Wear Limit
0.057-0.059 Inch (1.465-1.490mm)
0.056 inch (1.435mm) Minimum
0.057-0.059 Inch (1.465-1.490mm)
0.056 inch (1.435mm) Minimum
SECOND RING END GAP*:
Design End Gap
Wear Limit
0.005-0.016 Inch (0.15-0.40mm)
0.024 Inch (0.60mm) Maximum
0.006-0.016 Inch (0.15-0.40mm)
0.024 inch (0.60mm) Maximum
* Measure ring end gap with ring pushed down into cylinder to depth of 2.75 Inches (69.85mm).
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