1.general
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1.5 Exhaust Gas Emission Regulation
The EPA and ARB (,California Air Resources Board)
Off-road Compression Ignition engines regulations
1.5.1 Engine identification (3JH4E)
With the regulations on exhaust gas emission worldwide, it has become necessary to identify engines in
a manner to determine which regulations they comply with, hence
(1) Emission control label
(EPA and ARB label)
(Note) Emission Control is accomplished through Engine Modification (EM-Design)
• The tamper resistance device is installed with EPA/ARB certified 3JH4E series engines to prevent
illegal change of fuel injection volume and high idling speed.
(Fuel injection volume : cap type, High idling speed : cap type)
• Engine family name as assigned by EPN/ARB identifying engine family group
4YDXM1.64D3N and this identifies
(2) Label location:
YYDXM1.64D3N and this identifies
4 YDX M 1.64 D 3 N
Method of air aspiration
Number of cylinders
Combustion chamber design
Displacement (liter)
Marine engine
Yanmar
*2004 Model Year
Y : 2000
1 : 2001
2 : 2002
3 : 2003
4*: 2004
5 : 2005
Emission control label
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