XT 4WD F4-1781cc 1.8L SOHC Turbo (MPFI) (1987)
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Spark Plug: Technical Service Bulletins
Spark Plug - Recommendations
NUMBER
02-55-87
DATE
10-05-87
APPLICABILITY
ALL SUBARU "J" MODELS AND VEHICLES WITH SPI FUEL SYSTEMS
SUBJECT:
USE OF CHAMPION SPARK PLUGS
This Bulletin is for Information Only
Champion RN-9YC4 Spark Plugs have been approved for use in all SPI Fuel Systems and Justy 1.2 Litre 3 Cylinder Engines. See the chart below listing
all the recommended replacement spark plug types.
SPARK PLUG REPLACEMENT RECOMMENDATIONS
1.8 Litre SPI Fuel System
NGK:
BPR6ES-11 (or BPR5ES-11, BPR7ES-11)
Nippondenso:
W20EPR-U11 (or W16EPR-11, W22EPR-U11)
Champion:
RN9YC-4
Justy 1.2 Litre
NGK:
BPR6ES-11
Nippondenso:
W20EPR-U11
Champion:
RN9YC-4
Note:
The use of Champion RN11YC-4 is not recommended in SPI Fuel System vehicles or Justy models.
