Service - 86 ST37x Operator’s Manual
1000 Hour
1000 Hour
Change Engine Coolant
Drain cooling system at drain (2). Add approved
coolant at fill (1) every 1000 hours.
Adjust Valve Clearance
Adjust valve clearance every 1000 hours.
To adjust, see a certified Yanmar
®
engine technician.
Location Task Notes
Change engine coolant
Adjust valve clearance
Yanmar
®
certified technician
NOTICE:
• The use of non-approved coolant may
lead to engine damage or premature
engine failure and will void engine
warranty.
• See page 68 for list of approved coolants.
NOTICE: If valve clearance is adjusted by anyone other than a certified Yanmar
®
engine technician,
engine warranties could be voided. Please see engine manual for more information.
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