Bombardier SeaDoo 1997 factory shop manual, Page 172Get this manual
Section 07 ELECTRICAL SYSTEM Sub-Section 02 (IGNITION SYSTEM)
Spark Plug Symbol Explanation
PREFIX SUFFIX WIDE GAP
10: 1.0 mm (.040") 11: 1.1 mm (.044") 13: 1.3 mm (.050") 14: 1.4 mm (.055") 15: 1.5 mm (.060") 20: 2.0 mm (.080")
Thread diameter Heat rating numbers14 mm 10 mm 12 mm mm 12 mm 19 mm Reach
Firing end construction
19 mm (34") Taper Seat 12.7 mm (12") 11.2 mm (716") 21 mm (5354")
A: B: C: G: GV: L: S:
Special Design Single Ground Special Alloy Dual Ground Special Alloy Racing Type Racing Version of V-Type Half Heat Range Standard Center Electrode Fine Wire Center Electrode Booster Gap V-Grooved Center Electrode