Every 500 Hours Of Operation - Yanmar 3JH4E Operation Manual

Cleaning Exhaust / Water Mixing
Elbow
The mixing elbow is attached to the
turbocharger. 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. See your authorized
Yanmar marine dealer or distributor.
4. Inspect the gasket and replace if
necessary.
Cleaning the Turbocharger (If
Equipped)
Contamination of the turbocharger causes
revolutions to drop and engine output to fall.
If a significant drop in engine output is noted
(10% or more), clean the turbocharger.
This should be done only by a trained and
qualified technician. 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 62.
Checking the Wiring Connectors
See your authorized Yanmar marine dealer
or distributor.
Tightening All Major Nuts and Bolts
See Tightening Fasteners on page 54 or see
your authorized Yanmar marine dealer or
distributor.
JH4 Series Operation Manual
PERIODIC MAINTENANCE

Every 500 Hours of Operation

Perform the following maintenance every
500 hours or 2 years of operation, whichever
comes first.
• Replacing Exhaust / Water Mixing
Elbow
• Replacing Rubber Hoses
Replacing Exhaust / Water Mixing
Elbow
Replace the mixing elbow with a new one
every 500 hours or 2 years, whichever
comes first, even if no damage is found.
See your authorized Yanmar marine dealer
or distributor.
Replacing Rubber Hoses
Replace rubber hoses every 2000 hours or
2 years, whichever comes first.
See your authorized Yanmar marine dealer
or distributor.
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