Powersmart DB8621SR Manuel D'instructions page 24

5. If re-using the spark plug, use a wire brush to clean any dirt from around the spark plug base
then re-gap the spark plug.
6. Screw the spark plug back into the spark plug hole using the spark plug wrench. Do not
over-tighten spark plug. Recommended tightening of spark plug is ½ to ¾ of a turn after spark
plug gasket contacts spark plug hole. Reinstall the spark plug boot.
MAINTENANCE SCHEDULE
Item Action
Blade Inspect
Blade
mounting Inspect
bolt
Check
Engine oil
Change
Check
Air filter Clean
Replace
Grass bag Check
Blade control
Check
operation
Check
Spark plug
Replace
Fuel tank Clean
Flywheel
Check
brake pad
Valve Check-
clearance adjust
Fuel line Check
1. Service more frequently when used in dusty areas.
2.Change engine oil every 25 hours when used under heavy load or in high outside air temperatures.
Before 5 Hours of First 25
each use or hours of
use first use
month
x
x
x
x
x
x
x
Check every 2 years and replace if necessary
50 hours of 100 hours of
use or every use or every
6 months year
x 2
x 1 x 1
12
150 hours of
use or every
two years
x x
x 1
x
x
x
x
x
x
x