Yamaha 25BMH 30HMH Factory Service Manual, Page 236Get this manual

EXHAUST COVER
CHECKING THE EXHAUST COVER
Check: Exhaust inner cover Cracksdamage ReplaceCarbon deposits Clean(use round scraper) Exhaust outer cover Cracksdamage ReplaceCAUTION:

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