Recommended Maintenance Schedule for Vanguard™ Engines
First 5 Hours	Change oil
Every 8 Hours or Daily	Check engine oil level	Clean area around muffler and controls
Every 50 Hours or Annually	Change engine oil	Check muffler and spark arrester
Every 100 Hours or Annually	Clean air filter * Change engine oil and filter Check muffler and spark arrester	Clean pre-cleaner (if equipped) * Replace spark plug Check valve clearance **
Every 400 Hours or Annually	Change air filter Clean air cooling system *	Replace fuel filter Clean oil cooler fins *

*   In dusty conditions or when airborne debris is present, clean more often.
** Not required unless engine performance problems are noted.