Specifications
Every 250 Hours of Operation
Perform the following maintenance every
250 hours of operation.
• Changing the Lubricating Oil (SD50,
SD50-4T)
• Inspecting and Replacing the Clutch
Shifter
Changing the Lubricating Oil (SD50,
SD50-4T)
See Draining and Replacing Lubricating Oil 
- SD50 / SD50-4T on page 40.
Inspecting and Replacing the Clutch
Shifter
See your authorized Yanmar dealer or
distributor for procedure.
Every 500 Hours of Operation
• Inspecting and / or Replacing the
Cone-Clutch
Inspecting and / or Replacing the
Cone-Clutch
See your authorized Yanmar dealer or
distributor for procedure.
PERIODIC MAINTENANCE
SD Operation Manual 49
© 2009 Yanmar Marine International










