Bombardier SeaDoo 2000 factory shop manual volume 1, Page 263Get this manual
Section 08 ELECTRICAL SYSTEM Subsection 02 (IGNITION SYSTEM)
The "hot" type plug has longer insulator nose and transfers heat more slowly away from its firing endIt runs hotter and burns off combustion deposits which might tend to foul the plug during prolonged idle or low speed operation
Spark Plug Analysis
A00E0AA
1Overheated (light grey) 2Normal (brownish) 3Fouled (black)
A00E09A
1Cold 2Hot