MAINTENANCE & ADJUSTMENTS
5. Install the spark plug
carefully, by hand, to
avoid cross threading of
the cylinder head.
Use a spark plug wrench
to tighten the plug enough
to compress the washer.
For a used plug, tighten
l/8 to l/4 of a turn after
the spark plug seats. For
a new plug, tighten l/2
turn after the spark plug
seats.
A loose spark plug can become hot enough to damage the
engine. Overtightening a spark plug can damage the threads
in the engine.
6. Reconnect the spark plug cap.
Battery Service (electric start models) The riding mower charging system charges the battery while
the engine is running. However, if the riding mower is only
used periodically, the battery must be charged monthly to
maintain the battery service life.
A lead-acid battery self-discharges at a rate of 0.5 - 1 .O %
per day. If the riding mower is not operated for a month, the
battery can discharge as much as 30%. This could cause
the engine not to start or shorten the service life of the
battery. To charge the battery, follow the procedures below.
Removal
1. Raise and lock the seat (see page 53).
2. Remove the negative (-) cable from the battery negative (-)
terminal; then remove the positive (+) cable from the battery
positive (+) terminal.
3. Remove the battery from the battery tray.
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