Generac Power Systems OHVI GSH 190, Service Manual, Page: 57 / 72

14-1
SeCTIoN 14: SPeCIFICATIoNS - SMAll FrAMe eNGINeS
GeNerAl SPeCIFICATIoNS
Model GN-190 GN-191 GN/GSH-220
BORE 2.76 inches (70mm) 2.76 inches (70mm) 2.95 inches (75mm)
STROKE .9 inches (9mm) .9 inches (9mm) .9 inches (9mm)
DISPLACEMENT 88.6cc 88.6cc 26.5cc
OIL CAPACITY
WITH OIL FILTER CHANGE
2 ounces (700 ml) 2 ounces (700 ml) 2 ounces (700 ml)
OIL CAPACITY
W/O OIL FILTER CHANGE
ounces (00 ml) ounces (00 ml) ounces (00 ml)
vAlve TrAIN
Model GN-190 GN-191 GN/GSH-220
VALVE SEAT WIDTH
0.0-0.0 inch
(0.87-.mm)
0.0-0.0 inch
(0.87-.mm)
0.0-0.0 inch
(0.87-.mm)
VALVE SEAT ANGLE 6 degrees 6 degrees 6 degrees
VALVE MARGIN
0.058-0.060 inch
(.8-.52mm)
0.0-0.0 inch
(0.87-.mm)
0.0-0.0 inch
(0.87-.mm)
INTAKE VALVE STEM
DIAMETER 0.25-0.26 inch
(5.65-5.80mm)
0.28-0.25 inch
(5.965-5.980mm)
0.28-0.25 inch
(5.965-5.980mm)
EXHAUST VALVE STEM
DIAMETER 0.2-0.25 inch
(5.5-5.60mm)
0.2-0.26 inch
(5.95-5.960mm)
0.2-0.26 inch
(5.95-5.960mm)
TAPPET DIAMETER INTAKE
AND EXHAUST 0.29-0.295 inch
(7.6-7.75mm)
0.29-0.29 inch
(7.57-7.75mm)
0.29-0.29 inch
(7.57-7.75mm)
VALVE SPRINGS
FREE LENGTH .90 inch
(8.8mm)
2.07 inch
(52.69mm)
2.07 inch
(52.69mm)
FORCE REQUIRED TO
COMPRESS SPRING TO
.9 INCH (5.2mm)
.8-6. pounds
(6.7-7.kg)
9.8-2.8 pounds
(9.0-9.9kg)
9.8-2.8 pounds
(9.0-9.9kg)
VALVE CLEARANCE INTAKE
AND EXHAUST 0.002-0.00 inch
(0.05-0.0mm)
0.002-0.00 inch
(0.05-0.0mm)
0.002-0.00 inch
(0.05-0.0mm)
VALVE GUIDE DIAMETER
0.26-0.27 inch
(5.505-5.520mm)
0.27-0.26 inch
(6.02-6.005mm)
0.27-0.26 inch
(6.02-6.005mm)
14
CoMPreSSIoN PreSSure
Model GN-190 GN-191 GN/GSH-220
WHILE CRANKING
( PULLS - COLD ENGINE)
55 psi min. 55 psi min. 55 psi min.
0C1103Arev0.indd 1 6/22/2006 10:51:54 AM