Hayter Mowers 407D - Manual (Page 16)

MAINTENANCE
16
276798MA DRAFT COPY
SPARK PLUG
Check the spark plug every 25 hours. Re-
place the spark plug if the electrodes are
pitted or burned or if the porcelain is cracked.
1. Make sure the spark plug is clean. Clean
the spark plug by carefully scraping the
electrodes (do not sand blast or use a wire
brush).
2. Check the spark plug gap with a feeler
gauge. See “Product Specifications” for
the correct spark plug gap and replace-
ment spark plug.
3. Before installing the spark plug, coat the
threads lightly with oil for easy removal.
Tighten the spark plug to a torque of 15
foot−pounds.
Figure 12
Spark Plug
Feeler Gauge
0.030”
HOW TO ADJUST THE HEIGHT OF
THE HANDLEBAR
Use the knobs, on each side of the handle-
bar, to adjust the height of the handlebar.
1. Hold the handlebar with one hand and
loosen both knobs until the ratchet teeth
are disengaged. Do not remove the
knobs. See Figure 13.
2. Move the handlebar up or down to the de-
sired position, then align the ratchet
teeth. Make sure both sides of the hand-
lebar are level.
3. Tighten the knobs.
Figure 13
Ratchet
Teeth
Knob
Handlebar