Every 1000 Hours Of Operation - Yanmar 6SY Series Operation Manual

Replacing the Seawater Pump Impeller
1. Remove the impeller with an impeller
removal tool (Figure 21, (1)).
2. Install a new impeller and cap. If the cap
seal is hard or damaged, replace it.
(1)
Figure 21
Note: A spare impeller should be kept on-
board.
The impeller can become deformed during
long periods of inactivity. Replace or remove
the impeller before long periods of storage.
See Prepare Engine for Long-Term
Storage on page 59.
Checking the Alternator Belt
Tension
See Checking and Adjusting the Alternator
Belt on page 45.
Adjusting the Propeller Shaft
Alignment
See Adjusting Propeller Shaft Alignment on
page 45.
6SY Operation Manual
Perform the following maintenance every
1000 hours of operation or every 4 years,
whichever comes first.
• Adjusting the Unit Injectors / Rocker
• Cleaning and Checking the Seawater
• Replacing the Alternator Belt
• Adjusting the Intake / Exhaust Valve
• Replacing the Flexible Engine Mounts
Adjusting the Unit Injectors / Rocker
Arms
See your authorized Yanmar marine dealer
or distributor.
Cleaning and Checking the
Seawater Passages
See your authorized Yanmar marine dealer
or distributor.
Replacing the Alternator Belt
0004400
See your authorized Yanmar marine dealer
or distributor.
Adjusting the Intake / Exhaust Valve
Clearance
See Adjusting the Intake / Exhaust Valve
Clearance (Initial 250 Hours) on page 47.
Replacing the Flexible Engine
Mounts
See your authorized Yanmar marine dealer
or distributor.
PERIODIC MAINTENANCE

Every 1000 Hours of Operation

Arms
Passages
Clearance
57