Every Year
Perform the following maintenance every
year of operation.
• Cleaning Cooling Water Suction Hole
• Inspecting Remote Control Device
• Repairing Case Coating
• Inspecting and Replacing Rubber
Diaphragm Seal Ring
• Inspecting Seal Sensor
• Inspecting and / or Replacing the
Flexible Mount
Cleaning Cooling Water Suction
Hole
See Removing Deposits From The Lower
Inspecting Remote Control Device
See Remote Control Device Check on page
26.
Repairing Case Coating
See Repairing Damaged Coating on page
38.
Inspecting and Replacing Rubber
Diaphragm Seal Ring
Rubber diaphragms (A) and (B) (SD20 &
SD50, SD50-4T)
The rubber diaphragms (A) and (B) of the
Sail-Drive are important parts for the hull and
crew safety. Since rubber degenerates
during use, be sure to inspect them every
two years. The vessel must be lifted onto a
block for this procedure. To replace, consult
your Yanmar Marine dealer.
Inspecting Seal Sensor
See (Figure 9) on page 22. See your
authorized Yanmar Marine dealer or
distributor for inspection procedure.
Inspecting and / or Replacing the
Flexible Mount
Replace if clearance is less than 1 mm
(Figure 17, (1)). See your authorized
Yanmar Marine dealer or distributor for
procedure.
(1)
0005449
Figure 17
PERIODIC MAINTENANCE
50
SD Operation Manual
© 2009 Yanmar Marine International