Every 1000 Hours Of Operation - Yanmar 6LY3 series Service Manual

PERIODIC MAINTENANCE

Every 1000 Hours of Operation

Be sure to check the following every 1,000 hours of
operation or 4 years, whichever comes first.
• Check the Fuel Injector Spray Pattern
• Clean and Check the Seawater and Coolant
Passages
• Replace the V-Belt
• Adjust the Intake / Exhaust Valve Clearance
• Replace the Flexible Engine Mounts
Check the Fuel Injector Spray Pattern
Adjust to ensure the best possible engine
performance.
See Check the Fuel Injector Spray Pattern on
page 4-15 for the procedure.
Clean and Check the Seawater and Coolant
Passages
Trash, scale, rust and other debris collected in the
coolant passages cause cooling capacity to
decline.
1. Check the rubber hoses and clamps and
replace if necessary.
2. If trash, scale or rust is found in heat
exchangers, clean them. (See Inspect the heat
exchanger and pressure cap. See Heat
Exchanger Components and Functions on
page 7-13. on page 4-30.)
4-28
Replace the V-Belt
Replace the alternator drive belt every 1,000 hours
or 4 years, whichever comes first.
See Adjust the V-Belt Tension or Replace V-Belt on
page 4-14 for the procedure.
Adjust the Intake / Exhaust Valve Clearance
Inspect and adjust intake / exhaust valve clearance.
See Adjust Intake / Exhaust Valve Clearance on
page 4-18 for the procedure.
Replace the Flexible Engine Mounts
The flexible engine mounts deteriorate over time
and extended use and vibration. This can lead to
increased vibration and misalignment of the
propeller shaft. Replace the flexible engine mounts
every 1,000 hours or 4 years, whichever comes
first.
© 2007 Yanmar Marine International
Periodic Maintenance Procedures
6LY3 Service Manual