1B-8 - IMPORTANT INFORMATION 90-824052R3 JUNE 2002
Flushing Engine
Flushing Cooling System with
Engine NOT Running (Using Cowl
Flush Plug)
Flush the internal water passages of the outboard
with fresh water after each use in salt, polluted or
muddy water. This will help prevent a buildup of
deposits from clogging the internal water passages.
NOTE: DO NOT have the engine running above idle
speed when flushing the cooling system using the
cowl flush plug as the water pump impeller will not
receive sufficient water to prevent being damaged.
1. Remove the plug from fitting in the bottom
cowl.
2. Attach a water hose to the fitting. Turn water on
and flush for 3 to 5 minutes. DO NOT run the
engine above idle speed when flushing.
Flushing Cooling System with
Engine Running (Using Flushing
Attachment 44357A2)
WARNING
When flushing, verify that area in vicinity of pro-
peller is clear and that no person is standing
nearby – to avoid possible injury. It is recom-
mended to remove propeller as a precautionary
measure.
1. Install Quicksilver Flushing Attachment 44357A2
(or equivalent tool) on the gear housing from the
FRONT side, positioning the rubber cups over
the water intake openings.
2. Connect hose [1/2 in.(12.7mm) I.D. or larger]
between flushing attachment and water tap.
IMPORTANT: To prevent water pump damage, do
not start or run engine unless cooling water is
flowing.
3. With the outboard in the normal operating
position (vertical), partially open water tap (IT IS
NOT NECESSARY to use full water pressure)
and adjust water flow so that there is a significant
water loss around the rubber cups.
4. Start engine and idle in NEUTRAL. Increase
engine speed, not to exceed 2500 RPM.
5. Flush or service engine as required. Verify
adequate cooling water is provided.
a. Water must be discharged thru “tell tale.”
IMPORTANT: Prevent engine overheating. If wa-
ter flow is insufficient, stop engine and deter-
mine cause before continuing.
b. Flush until discharge water is clear. In salt-
water areas, run outboard 3 to 5 minutes.
c. Stop engine before turning off water.
6. Stop engine, turn water off and remove flushing
attachment from gear housing.
IMPORTANT: While and after flushing, keep out-
board in upright position until all water has
drained from drive shaft housing to prevent wa-
ter from entering the powerhead via drive shaft
housing and exhaust ports.
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