2-18 PERIODIC MAINTENANCE
BATTERY SOLUTION LEVEL CHECK
Battery solution level should be between UPPER level and
LOWER level.
If level is low, add distilled water only.
BATTERY SOLUTION GRAVITY CHECK
Measure the gravity of battery solution using a hydrometer.
09900-28403: Hydrometer
Battery solution gravity: 1.28 at 20 °C
BOLTS AND NUTS
Check that all bolts and nuts listed below are tightened to their
specified torque.
Once the battery has been initially serviced, NEVER
add diluted sulfuric acid or battery damage will occur.
Follow the battery manufacture’s instructions for spe-
cific maintenance procedures.
Inspect initially after 20 hours (1 month) and every
100 hours (6 months).
ITEM
THREAD
DIAMETER
TIGHTENING TORQUE
N·m kg-m lb-ft
Cylinder head cover bolt 6 mm 10 1.0 7.0
Cylinder head bolt 8 mm 27 2.7 20.0
Intake manifold bolt 8 mm 23 2.3 16.5
Carburetor mounting bolt 6 mm 10 1.0 7.0
Flywheel nut 14 mm 80 8.0 58.0
Power unit mounting bolt/nut 8 mm 23 2.3 16.5
Clamp bracket shaft nut 7/8-14 UNF 43 4.3 31.0
Tiller handle cover bolt 8 mm 17 1.7 12.5
Gearcase bolt 8 mm 23 2.3 16.5
Propeller nut 12 mm 18 1.8 13.0
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