7
NOTE - On 2-stroke engines a broken or damaged reed
plate will prevent starting.
e) EQUIPMENT
What may initially appear to be an engine fault, such as
a starting difficulty or engine vibration, may possibly be
the fault of the equipment rather than the engine.
Owing to the great number of machines in use, it is not
possible to list these separately. The following is a list of
the more common problems:
Hard Starting, Kickback, Failure to Start
- Loose blade. The blade must be tight on shaft or adaptor.
- Loose belt. A loose belt, as with a loose blade, can
cause a backlash effect which will counteract the engine
cranking effort.
- Starting under load; ascertain that the equipment is
disengaged if the unit has a heavy starting load.
- Check remote control assy for proper adjustment with
the lever A in choke or start position. The carburettor
choke should be fully closed (Fig 6).
- Grass cuttings building up under deck may cause
difficulties. Clean deck.
- Check that grass collectors are empty. An overfilled
collector could cause engine malfunction.
Vibration
- Damaged or out of balance blade
- Damaged or out of balance impellor
- Loose mounting bolts, engine to deck
- Worn blade mounting; replace if mounting allows blade
to move causing unbalance.
Noise
- Cutter blade coupling or pulley, an oversize or worn
coupling can result in knocking, particularly under
acceleration. Check for fit and tightness.
Fig. 6
A
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