Spark Arresting Muffler; Safety Guard; Spark Plug - Efco SA 2700 Operator's Instruction Manual

en
RCJ-7Y
BPMR6A
20
MAINTENANCE
WARNING: Never test the ignition system with ignition wire
connector removed from spark plug or with unseated spark
plug, since uncontained sparking may cause a fire. A loose
connection between spark plug terminal and ignition wire
connector in the boot may create arcing that could ignite
combustible fumes and cause a fire.
Use only resistor type spark plugs of the approved range.
Factors such as:
- too much oil in fuel mix;
- dirty air filter;
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- unfavourable running conditions, e.g. operating at part load;
may result in rapid deterioration of the spark plug.

Spark Arresting Muffler

The blower is provided with a Spark Arrester System p.n. 8856560020A
(Fig. 49) complying with the requirements of SAE J335 standard; you can
check the p.n. of the Spark Arrester System on the muffler itself.
WARNING – This muffler incorporates a catalytic converter,
needed in order to ensure the engine complies with current
emissions standards. Never attempt to modify or remove the
catalytic converter: in doing so, you will be breaking the law.
48 WARNING – Mufflers with catalytic converters become very
hot during operation, and retain heat for a long time after
the engine has been stopped. This is the case even with the
engine idling. Contact can burn the skin. Always remember
the potential fire risk!
CAUTION – If the catalytic converter is damaged, it must
be replaced. If the catalytic converter frequently becomes
blocked, this could be an indication that the efficiency of
the muffler is limited.
Spark arrester screen
As the spark arrester screen (D, Fig.49) can become dirty during normal
use, it should be inspected weekly and cleaned as required. In particular:
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- check the spark arrester screen periodically, and replace it if holed, bent
or buckled;
- check carefully for any dust, debris or organic material that may be in
contact with parts of the spark arrester system; clean regularly using
tools or compressed air.
Cleaning:
• Allow the muffler to cool.
• Remove the two screws (A, Fig.48) securing the deflector.
• Remove the deflector (B, Fig.49) , the gasket (C) and the spark arrester
screen (D).
• Clean and inspect the spark arrester screen.
WARNING – Replace the spark arrester screen if
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damaged, faulty or worn (p.n. 56560021AR).
• Reassemble the components removed previously, in reverse order, and
tighten the screws (A, Fig.49) torquing to 0.5 kgm (4.9 Nm).
WARNING – Do not use the blower if the muffler is damaged
or missing, or has been altered in any way. Operating the
machine with an improperly maintained muffler will increase
the risk of fire and hearing loss.

Safety guard

Check that the spring (D, Fig.50) and the catch (E, Fig.51) are in perfect
working order. These components ensure that the safety guard is properly
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closed.