- 14 -
WARNING:
Periodically inspect the blade adapter for cracks, especially if you strike a foreign object.
Replace when necessary.
For best results your blade should be sharp. The blade may be re-sharpened by removing it and either grinding
or filing the cutting edge, keeping it as close to the original bevel as possible. It is extremely important that
each cutting edge receives an equal amount of grinding to prevent an unbalanced blade. An improper blade
balance will result in excessive vibration, causing eventual damage to the engine and mower. Be sure to
carefully balance the blade after sharpening. The blade can be tested for balance by balancing it on a round
shaft screwdriver. Remove metal from the heavy side until it balances evenly.
Before re-assembling the blade and the blade adapter to the mower, lubricate the engine crankshaft and the
inner surface of the blade adapter with a light oil. Install the blade adapter on the crankshaft. Refer to figure 12.
Place the blade with the part number facing away from the adapter. Align the washer over the blade and insert
the hex bolt. Tighten the hex bolt to the torque listed below:
Fig.12
9.3 BLADE MOUNTING TORQUE
Center Bolt 40Nm-50Nm, to insure safe operation of your unit. All nuts and bolts must be checked periodically
for correct tightness.
After prolonged use, especially in sandy soil conditions, the blade will become worn and lose some of the
original shape. Cutting efficiently will be reduced and the blade should be replaced. Replace with an approved
factory replacement blade only. Possible damage resulting from blade unbalance condition is not the
responsibility of the manufacturer.
When you change the blade, you must use the original type marked on the blade (
Cobra Part number
263001465
.
Please contact your local dealer to order a replacement)
9.4 ENGINE
Refer to the separate engine manual for engine maintenance instructions.
Maintain engine oil as instructed in the separate engine manual packed with your unit. Read and follow
instructions carefully.
Service the air filter cleaner as per the separate engine manual under normal conditions.
Clean every few hours under extremely dusty conditions. Poor engine performance and flooding usually
indicates that the air cleaner should be serviced.
To service the air cleaner, refer to the separate engine manual packed with your unit.
The spark plug should be cleaned and the gap reset once a season. Spark plug replacement is recommended
at the start of each mowing season. Check the engine manual for correct plug type and gap specifications.
Clean the engine regularly with a cloth or brush. Keep the cooling system (blower housing area) clean to
permit proper air circulation, which is essential for engine performance and life. Be certain to remove all grass,
dirt and combustible debris from the exhaust area.
10. CHARGING THE STARTER BATTERY