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28 AC-Series Operator’s Manual-E/F
Service
CLEAN AIR FILTER ELEMENT
1. Push lower part of tabs (A) inward and through tab holders to remove cleaner cover.
2. Remove paper element (B).
3. Remove excess dirt from paper element (B) by tapping lightly on hard surface, or by blowing compressed air
from inside the element. Do NOT brush dirt. Brushing will force dirt into element bers. Replace paper element
after 250 hours, or if excessively dirty.
PIC156-102299R0
A
PIC157-102299R0
B
SPARK ARRESTOR
In some areas, it is illegal to operate an engine without
a USDA (United States Department of Agriculture)-
qualified spark arrester. Check local laws and
regulations. A USDA-qualified spark arrester is
available from an authorized servicing dealer.
P09-013107
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
A
PIC99-102299R0