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Cobra M40SPB Manual

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4. Air dry filter the element.
5. Place a few drops of SAE30 oil on the foam filter and squeeze tightly to remove any excess oil.
6. Reinstall filter.
NOTE: Replace the filter, if it is frayed, torn, damaged or unable to be cleaned.
Fig.13A Fig.13B Fig.13C
10.2 CUTTING BLADE
CAUTION: Be sure to disconnect and ground the spark plug wire before working on the cutting blade to prevent accidental
engine starting. Protect hands by using heavy gloves or a rag to grasp the cutting blades.
Tip mower as specified in separate engine manual. Remove the hex bolt and washer, which holds the blade and blade adapter to
the engine crankshaft. Remove the blade and adapter from the crankshaft.
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. Slightly worn blades may be re-sharpened with care. After removing the
blade, it may be ground or filed, so that the cutting edge is 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. Improper blade balance will result in
excessive vibration causing damage to the engine and mower. Be sure to carefully balance 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 reassembling the blade and the blade adapter to the unit, lubricate the engine crankshaft and the inner surface of the
blade adapter with light oil. Install the blade adapter on the crankshaft. Refer Fig.14. 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.14
10.3 BLADE MOUNTING TORQUE
Center Bolt 40Nm.min, 50Nm.max. 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 is not the responsibility of the manufacturer.
When you change the blade, use the original type marked on the blade:
Cobra part number 26300100401 for M40B and M40SPB
Cobra part number 263001465 for M46B and M46SPB
Please contact your local dealer for the supply of genuine Cobra parts
WARNING: Do not touch rotating blade.
… 12 …


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  • The clutch cable on my Cobra is either broken or stretched - how can I check it? I've taken 9 or 10 screws froma cover but cover won't move! Many thanks Gordon.

    gordon@ukinfoweb.com Submitted on 28-3-2022 at 17:40

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