Onan CCK Service Manual

4. Release governor mechanism to allow engine to
accelerate. If engine accelerates evenly and
without a lag, the main adjustment is correct. If
not, adjust the screw outward about 1/2 turn and
again slow down the engine and release the
mechanism. Continue until the engine acceler¬
ates evenly and without a time lag after releasing
the governor.
6AS MAIN RJEL
IDLE FUEL ADJUSTMENT
ADJUSTMENT
BOWL COVER
SCREW
„ CHOKE PLATE
JL t'
FIGURE 16. CCKB GAS CARBURETOR
Gas-Fueled Carburetor
Allow the engine to warm up if preliminary adjust¬
ments are satisfactory for initial startup, tf the engine
will not start, set the idle fuel adjustment screw (Fig¬
ure 16) two turns off seat and main adjusting screw
approximately three turns (six turns for only 800 BTU
gas). These settings should be adequate for starting.
1. Turn idle fuel adjustment screw out until engine
speed drops, then turn in until speed increases to
maximum.
2. Apply a full load to engine.
3. Turn main gas adjusting screw in until engine
loses power. Slowly back out screw until engine
carries full load smoothly.
4. Check setting with varying loads.
CARBURETOR OVERHAUL
Carburetion problems that are not corrected by mix¬
ture adjustments are usually a result of gummed-up
fuel passages or worn internal parts. The most effec¬
tive solution is a complete carburetor overhaul.
I warning \ Ignition of fuel might cause serious
■ personal injury or death by lire or
explosion. Do not permit any flame, cigarette, or
other igniter near the fuel system.
SIDE DRAFT CARBURETOR
FIGURE 17. TYPICAL CARBURETOR ASSEMBLIES
23

Onan CCK Specifications

General

Cylinders	2
Ignition System	Battery ignition
Fuel Type	Gasoline
Cooling System	Air-cooled
Fuel System	Carburetor
Starter	Electric
Governor	Mechanical
Max RPM	1800 RPM
Engine Type	4-cycle
Bore and Stroke	3.25 x 3.625 inches (82.55 x 92.08 mm)