Onan CCKA User Manual

DESCRIPTION
MINIMUM MAXIMUM
PISTON PIN
Inches (mm) inches (mm)
Clearance in Piston.
Thumb Push Fit
Clearance in Connecting Rod ... *... ........ 0.0002
(0.005) 0.0007
(0.018)
Diameter.
PISTON RINGS
Clearance
.. 0.7500
(19.05) 0.7502 (19.06)
Top Groove.... . 0.002
(0.051)
0.008
(0.203)
Ring End Gap in Cylinder.
INTAKE VALVE
. 0.010 (0.254) 0.020 (0.508)
Stem Diameter...
. 0.3425
(8.70) 0.3430 (8-71)
Clearance (Stem to Guide) .
Valve Face Angle.
INTAKE VALVE SEAT
. 0.0010 (0.025) 0.0025
44°
(0.064)
Valve Seat Width.
Valve Seat Angle.
EXHAUST VALVE
. 0.031 (0.787)
0.047
45°
(1.194)
Stem Diameter. . 0.3410 (8.661)
0.3415 (8.674)
Clearance (Stem to Guide).
Valve Face Angie.
EXHAUST VALVE SEAT
. 0.0025 (0.064)
0.004
44°
(0.102)
Seat Cylinder Head Bore Diameter.
. 1.1890 (30.20) 1.1900
(30.23)
Seat Outside Diameter...
. 1.1920 (30.28)
1.1930
(30.30)
Valve Seat Width.
Valve Seat Angle.
VALVE GUIDE
. 0.031 (0.787) 0.047
45°
(1.194)
Inside Diameter.....
TAPPET
. 0.344
(8.74)
0.346
(8.79)
Body Diameter.
. 0.7475
(18.99) 0.7480
(19.00)
Bore Diameter. ........ 0.7505
(19.06) 0.7515
(19.09)
Clearance in Bore.....
VALVE SPRINGS INTAKE AND EXHAUST
. 0.0015
(0.038) 0.003
(0.076)
Valve Spring Free Length (Approx.)...
Valve Spring Length
1.662 (42.21)
Valve Open.....
1.125' (28.58)
Valve Closed. 1.375 (34.93)
Spring Load @ 1.375 inch (Valve Closed)........ ........ 38 ib. (17 kg)
42 ib.
(19 kg)
Spring Load @1.125 inch (Valve Open).
GEAR BACKLASH
. 71 Ib
(32 kg)
79 Ib (36 kg)
Timing Gear. . 0.002 (0.051) 0.003
(0.076)
Oil Pump Gear..... . 0.002 (0.051)
0.005 (0.127)
5

Onan CCKA Specifications

General

Cylinders	2
Ignition System	Battery ignition
Engine Type	4-cycle
Bore	3.25 in (82.55 mm)
Power Output	Varies with model. e.g., 6.5 kW (CCK)
Horsepower	10 hp
Starter	Electric