Perform regular inspection(Repair and maintenance plan) 
Measure Idle exhaust (Note 1) 
Adjust carburetor(Note 2) 
Disassemble and clearn carburetor 
(SJ, MJ, SAJ, MAJ, etc.) 
Replace Carburetor 
Disassemble and repair engine. 
• Valve (Leak) 
• Piston (Worn) 
• Combustion chamber(clean) 
For Delivery. 
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Classification  Equipment  Constituted Part  Desired Function 
Emission control system  Catalytic device Catalytic converter
Oxidize CO, HC and NO
X
.
 
17.4 Solutions to Idle Exhaust Exceeding Specified Value (4-stroke) 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Note 1: Measure according to the idle speed measuring procedures.  
Note 2: Adjust with lock screw engine rpm to the specified and measure idle CO/HC. 
 
 
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