Every 1000 Hours Of Operation - Yanmar 2YM15 Operation Manual

PERIODIC MAINTENANCE
Cleaning or Replacing the
Exhaust / Water Mixing Elbow
There are two types of mixing elbows, the
L-type and the U-type. The mixing elbow is
attached to the exhaust manifold. The
exhaust gas is mixed with seawater in the
mixing elbow.
1. Remove the mixing elbow.
2. Clean dirt and scale out of the exhaust
and seawater passages.
3. If the mixing elbow is damaged, repair
or replace it. See your authorized
Yanmar Marine dealer or distributor.
4. Inspect the gasket and replace if
necessary.
Replace the mixing elbow with a new one
every 500 hours or two years, whichever
comes first, even if no damage is found.
See your authorized Yanmar Marine dealer
or distributor.
Adjusting the Alternator V-Belt
Tension
See Checking and Adjusting the Alternator
V-Belt Tension on page 54.
Cleaning the Breather Pipe
See your authorized Yanmar Marine dealer
or distributor.
Checking the Wiring Connectors
See your authorized Yanmar Marine dealer
or distributor.
62

Every 1000 Hours of Operation

Perform the following maintenance every
1000 hours or 4 years of operation,
whichever comes first.
• Checking the Fuel Injection Timing
• Checking the Fuel Injector Spray
Pattern
• Replacing the Seawater Pump
Impeller
• Cleaning and Checking the Seawater
Passages
• Checking Diaphragm Assembly
• Replacing the Alternator V-Belt
• Adjusting Intake / Exhaust Valve
Clearance
• Checking and Adjusting the Remote
Control Cables
• Adjusting the Propeller Shaft
Alignment
• Tightening All Major Nuts and Bolts
Checking the Fuel Injection Timing
See your authorized Yanmar Marine dealer
or distributor.
Checking the Fuel Injector Spray
Pattern
See your authorized Yanmar Marine dealer
or distributor.
Replacing the Seawater Pump
Impeller
The seawater impeller must be replaced
every 1000 hours or every 4 years even if it
is not damaged.
See Checking or Replacing the Seawater
Pump Impeller on page 60.
YM Series Operation Manual
© 2007 Yanmar Marine International