1998-2000 Yamaha WaveRunner GP800 Factory Service Manual, Page 143Get this manual

'1=-:1 'IGNITION SYSTEM
SPARK PLUGS SPARK PLUG CAPS 1Inspect:
Spark plug cap Loose TightenReplaceCracksdamage

Refer to "ELECTRICAL" in chapter 3
2Measure:
Spark plug cap resistance Out of specification ReplaceSpark plug cap resistance:

• ATV
• Jet Ski
• Outboard Motors
• Personal Watercraft
• Snowmobiles
• Stern Drives