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TECHNICAL SERVICE BULLETIN NUMBER PI 3124
Date:
December 2004
Model & Serial: TBC-340/D
All Units After Serial Number Z308901
Reason: Our in-field monitoring program has indicated that some units may misfire when
the engine temperature is very high. This is typically due to operating the engine
at low engine RPM or with an excessive load.
The ignition coil and insulating washers listed below correct this high
temperature misfire. Units experiencing misfiring issues should have the ignition
coil and washers replaced to eliminate the problem.
Part Number Changes:
Reference # Old Part # New Part # Description
# 50 167-20546-91 167-20549-91 Ignition coil assembly
# 55 178-20546-20 178-20549-20 High-tension cord 140L
# 31 182-0186A-201 Washer 1.6 (2 pcs)
# 30 994-63040-154 994-64040-184 Hex hole bolt 4x18WS (2 pcs)
is marketed exclusively by:
ISM, Inc. • 1028 – 4
th
Street, Suite B • Auburn, WA 98001 • Phone: (253) 333-1200 • Fax: (253) 333-1212
www.tanaka-usa.com * custsvc@tanaka-ism.com