Subaru Robin Engines SX21 - 7. MAINTENANCE; DAILY INSPECTION; PERIODIC INSPECTION; INSPECTING THE SPARK PLUG

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ENGLISHFRANÇAISEESPAÑOL
7. MAINTENANCE
(See Fig. 7)
MAINTENANCE, REPLACEMENT, OR REPAIR OF
THE EMISSION CONTROL DEVICES AND SYSTEMS
MAY BE PERFORMED BY ANY NONROAD ENGINE
REPAIR ESTABLISHMENT OR INDIVIDAL.
1. DAILY INSPECTION (See Fig. 7-①)
Before running the engine, check the following service items.
󰿿 Loose or broken bolts and nuts
󱀀 Enough clean engine oil
󱀁 Leakage of gasoline and engine oil
󱀂 Enough gasoline
󱀃 Safe surroundings
󱀄 Excessive vibration, noise
2. PERIODIC INSPECTION
Periodic maintenance is vital to the safe and efcient operation
of your engine.
Check the table below for periodic maintenance intervals.
IT IS ALSO NECESSARY FOR THE USER OF THIS ENGINE
TO CONDUCT THE MAINTENANCE AND ADJUSTMENTS ON
THE EMISSION-RELATED PARTS LISTED BELOW TO KEEP
THE EMISSION CONTROL SYSTEM EFFECTIVE.
The emission control system consists of the following parts :
(1) Carburetor and internal parts
(2) Cold start enrichment system, if applicable
(3) Intake manifold, if applicable
(4) Spark plug
(5) Magneto or electronic ignition system
(6) Spark advance/ retard system, if applicable
(7) Exhaust manifold, if applicable.
(8) Hoses, belts, connectors, and assembles
The maintenance schedule indicated in the following table is
based on the normal engine operation.
Should the engine be operated in extremely dusty condition or
in heavier loading condition, the maintenance intervals must be
shortened depending on the contamination of oil, clogging of
lter elements, wear of parts, and so on.
3. INSPECTING THE SPARK PLUG
(See Fig. 7-②,③)
(1) Remove three bolts from bafe to examine a spark plug, and
please remove bafe. (See Fig.󱯚-󰴥)
󰿿 SPARK PLUG
󱀀 BAFFLE
󱀁 BOLT
(2) Clean off carbon deposits on the spark plug electrode using
a plug cleaner or wire brush.
(3) Check electrode gap. The gap should be 0.6 mm to 0.7mm
(0.02 inch.-0.03 inch.). Adjust the gap, if necessary, by
carefully bending the side electrode. (See Fig.󱯚-󰴦)
Recommended Spark Plug :
SX17 . . . .
E4RC (TORCH) / BR-4HS (NGK)
SX21/30 . . . . . . . . . . . . . . . BR-4HS (NGK)
Parts number
E4RC (TORCH)
BR-4HS (NGK)
(NA)
065 - 01407 - 40
Periodic Maintenance Schedule table
Maintenance Items Every 8 hours (Daily) Every 50 hours (Season) Every 100 hours (Season)
Clean engine and check bolts and nuts
 (Daily)
Check and rell engine oil
 (Rell daily up to upper level)
Change engine oil (*Note 1)
 (Initial 20 hours) 
Clean spark plug

Clean fuel cup

Clean and adjust spark plug and electrodes

Replace spark plug

*Note 1: Initial oil change should be performed after rst twenty (20) hours of operation. Thereafter change oil every hundred (50) hours.
Before changing oil, check for a suitable way to dispose of old oil. Do not pour it down into sewage drains, onto garden soil or into
open streams. Your local zoning or environmental regulations will give you more detailed instructions on proper disposal.