Checking The Spark Plug - Makita BHX2501 Betriebsanleitung

2. Cleaning of air cleaner
WARNING: INFLAMMABLES STRICTLY PROHIBITED
Interval of Cleaning and Inspection: Daily (every 10 operating
hours)
(1) Remove the air cleaner cover-fixing bolts.
(2) Pull the cover lower side and detach the air cleaner cover.
(3) Turn the choke lever to the full close side, and keep the carbu-
retor off from dust or dirt.
(4) If oil adheres to the element (sponge), squeeze it firmly.
(5) For heavy contamination:
• Remove the element (sponge), immerse it in warm water or
in water-diluted mild detergent, and dry it completely.
• Clean the element (felt) with gasoline, and dry it completely.
(6) Before attaching the element, be sure to dry it completely.
Insufficient drying of the element may lead to difficult startup.
(7) Wipe out with waste cloth, oil adhering around the air cleaner
cover and plate breather.
(8) Immediately after cleaning is finished, attach the air cleaner
cover and tighten it with fixing bolts. (In remounting, first place
the upper claw, and then the lower claw.)
• Clean the element several times a day, if excessive dust adheres to it.
• If operation continues with the element remaining not cleared of oil, oil in the air cleaner may fall outside, resulting in oil contamination.

3. Checking the spark plug

(1) Opening/closing the plug cover
When opening the cover, apply fingers to the main handle
and plug cover projection (Figure 1). Push up the projection
and slide the cover in the "OPEN" direction (Figure 2).
When closing the cover, slide the cover in the "CLOSE"
direction till the click under the plug cover projection rides
over the engine cover. Finally, push in the projection.
(2) Removing the spark plug
Use an attached box wrench to remove or install the spark
plug (Figure 3).
(3) Checking the spark plug
The clearance between two electrodes of spark plug is 0.7
to 0.8 mm (Figure 4). Adjust to the correct clearance when it
is too wide or too narrow.
Clean thoroughly or replace the spark plug if it has accumu-
lated carbon or contaminated.
(4) Replacing the spark plug
For replacement, use NGK-CMR6A.
Element
(sponge)
Air cleaner
cover
Fixing bolt
DANGER
Figure 1
Figure 3
15
Plate
Breather Part
Element
(felt)
Pick this part and remove the
element (felt).
Figure 2
Figure 4
Lateral electrode (–)
Electrode clearance
0.7 - 0.8 mm