Makita EM4250 Instruction Manual page 20

CHECKING THE SPARK PLUG
-Only use the supplied universal wrench lo remove or to install the spark
-The gap belween the two electrodes of Ihe spark plug should be 0.7-0.8mm
(0.028"-0.032"). If the gap is too wide or too narrow, adjust it. If the spark
plug is clogged with carton or fouled, clean it thoroubhly or replace it.
plug.
CAUTION: Never touch the spark plug connector while the engine is running
(danger of hlgh voltage electric shock).
SUPPLY OF GREASE TO GEAR CASE
-supply grease
(Shell Alvania 2 or equivalent) to the gear case through the
grease hole every
30
hours. (Genuine MAKITA grease may be purchased
from your MAKITA dealer.)
CLEANING OF FUEL FILTER
WARNING: INFLAMMABLES STRICTLY PROHIBITED
Interval of Cleaning and Inspection: Monthly (every 50 operating hours)
Suction head In the fuel tank
-The fuel filler (1) of the suction head is used to filler the fuel required by the
carburetor.
-A periodical visual inspection of the fuel filler is to be conducted. For that
purpose open the tank cap, use a wire hook and pull out the suction head
through the tank opening. Filters found to have hardened, been polluted or
clogged
up
are to be replaced.
exceeded. It is therefore important to replace the fuel filter at least quarterly
to ensure satisfactory fuel supply to the carburetor.
-Insufficient fuel supply can result in the admissible maximum speed being
REPLACEMENT OF FUEL PIPE
CAUTION: INFLAMMABLES STRICTLY PROHIBITED
Interval of Cleaning and Inspection: Daily (every 10 operating hours)
Replacement: Annually (every ,200 operating hours)
Replace the fuel plpe every year, regardless of operating frequency. Fuel
.
leakage may lead to fire.
If any leakage is detected during inspection, replace the oil pipe immediately.
INSPECTION OF BOLTS, NUTS AND SCREWS
-Retighten loose bolts, nuts, etc.
-Check for fuel and oil leakage.
-Replace damaged parts with new ones for safety operation.
CLEANING O F PARTS
-Keep the engine always clean.
-Keep the cylinder fins
free
of dust or dirt. Dust or dirt adhering
lo
the fins will
cause seizure.
0.7mm-OBmm
(0.028"-0.0327
Fuel pipe
REPLACEMENT OF GASKETS AND PACKINGS
In reassembling after the engine is dismounted, be sure lo replace the gaskets and packings with new ones.
Any mainlenance of adjustment work that is not Included and described in this manual is only to be performed by Authorized Service Agents.
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