Flushing The Cooling System (Lower Unit) - Mercury 225 Pro XS User Manual

Flushing the Cooling System (Lower Unit)

To avoid possible injury when flushing, remove the propeller. Refer to
Propeller Replacement.
a
a - Fleet Master and Torque
Master gearcase
b - Sport Master gearcase
1. Remove the propeller. Refer to Propeller Replacement.
2. Fleet Master and Torque Master gearcases – Install the appropriate
flushing attachment so the rubber cups fit tightly over the strut intake
holes. Attach the Dual Water Flush Seal over the nose inlets.
3. Sport Master gearcases – Install the appropriate flushing attachment
so the nose cone cup fits tightly over the intake holes.
4. Attach a water hose to the flushing attachment. Turn on the water and
adjust the flow so water is leaking around the rubber cups or nose
cone cup to ensure the engine receives an adequate supply of cooling
water.
5. Start the engine and run it at idle speed in neutral shift position.
6. Adjust water flow so excess water continues leaking out from around
the rubber cups or nose cone cup to ensure the engine is receiving
an adequate supply of cooling water.
7. Check for water coming out of the water pump indicator hole. Continue
flushing for three to five minutes, carefully monitoring water supply at
all times.
8. Stop the engine, turn off the water, and remove the flushing
attachment. Re‑install the propeller.
MAINTENANCE
WARNING
!
b
d
d
c - Water hose
d - Flushing attachments
59
c
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