Yanmar 6LY3 series Service Manual page 41

Periodic Maintenance Procedures
12/05
2. Remove the oil filters with an oil filter wrench.
Turn counterclockwise.
3. Clean the face of the oil filter mounts
(Figure 4-4, (3)). Replace the filters. Apply oil to
the rubber seal of the filters and install by hand
until the rubber seal touches the sealing face of
the filter mount.
4. Use a filter wrench and turn clockwise an
additional 3/4 of a turn for the full flow filter
(Figure 4-4, (4)). Turn the filter wrench
clockwise an additional full turn for the bypass
filter (Figure 4-4, (2)).
5. Fill with new oil. See Inspect Before Starting on
page 4-6.
6. Start engine and check for oil leaks.
7. Wait 10 minutes after stopping the engine.
Remove the oil dipstick and check the oil level.
Add oil if level is below the upper limit line on
dipstick.
Check the Electronic Control System
The electronic governor of the engine and the
marine gear are connected to the control head,
switch panel and display through the Interface
Module by wiring harnesses and terminal
connectors.
The wiring terminals may become loose after long
hours of use. It is dangerous to operate under
these conditions. Check the wiring periodically.
1. Check the wiring harness and connectors for
the throttle control cable. Check for loose
wiring.
2. Check the wiring harness and connectors to the
control cable line for the marine gear. Check for
loose wiring.
Check that the shifting of the marine gear moves
smoothly and test it in the NEUTRAL, FORWARD
and REVERSE positions.
6LY3 Service Manual
Adjust the Propeller Shaft Alignment
The flexible engine mounts compress slightly after
the initial engine operation. This may cause
misalignment between the engine and the propeller
shaft.
1. Check for unusual noise and vibration of the
engine / boat hull, while gradually increasing
and decreasing the engine speed.
2. If there is unusual noise and / or vibration,
adjust the propeller shaft alignment.
© 2007 Yanmar Marine International
PERIODIC MAINTENANCE
4-9