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PR-Series Operator’s Manual-E/F 31
Service
ADJUSTING RPM
1. Start engine. Allow it to warm to normal operating
temperature.
2. Move throttle lever to its minimum position.
3. With engine idling, turn throttle stop screw (A) to obtain
standard idle speed.
NOTE: Standard idle speed is 1250 - 1550 RPM.
NOTE: Idle should be serviced every 300 hours by an
authorized dealer. Operator should adjust only if
mechanically procient and using proper tools.
PIC98-102299R0
DWG15-102299R0
CLEANING SEDIMENT CUP
CAUTION: Clean sediment cup in a well ventilated
area, away from sparks or ame, including any
appliance with a pilot light. Do not use gasoline
or a low ash-point solvent to clean the fuel valve.
A re or explosion could result.
NOTE: AC-2400G illustrated, but procedure is the same for
other washers.
NOTE: Clean sediment cup after every 100 hours of use.
1. Turn fuel valve (A) to left as illustrated to shut off the
fuel ow.
2. Remove cap screw (B) with a 10mm wrench. Remove
sediment cup (C) and o-ring.
3. Remove any sediment or other foreign matter and
wash in nonammable or high ash point solvent. Dry
thoroughly.
4. Install o-ring and sediment cup with cap screw.
5. Turn fuel valve right to “ON” position and check for fuel
leaks.
PIC100-102299R0
A
A
B
C
CLEANING AND GAPPING SPARK PLUG
1. Remove and inspect spark plug. If porcelain is cracked
or electrodes are pitted, install a new spark plug. (See
step 5.)
IMPORTANT: Do not clean spark plug in a machine
using abrasives.
2. If spark plug is in good condition, clean plug by scraping
or using a wire brush. Wash with a commercial
solvent.
3. Use a round wire-type feeler gauge to check for a gap
of 0.70 to 0.80 mm (0.028 to 0.031 inches.)
4. Carefully bend outer electrode to adjust gap.
5. Install spark plug.
Reinstalling used plug: Tighten 1/8 - 1/4 turn after spark
plug seats to compress washer.
Installing new plug: Use NGK BPR6ES
PIC99-102299R0