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PREDELIVERY PREPARATION AND STORAGE
7. Depress the throttle only button and slowly advance the throttle until the engine reaches 1300
RPM (± 100 RPM).
8. Observe the water temperature gauge to ensure that the engine is operating in the normal
range.
9. Operate engine with sterndrive in neutral for about 10 minutes or until discharge water is clear.
10. Slowly return throttle to idle speed position.
11. Stop engine.
12. Shut off water and remove flushing attachment.
13. This step is only required if the boat is to be stored in the water. After the flush procedure is
completed, remove the seawater inlet hose from the thermostat housing and plug the hose to
prevent water from siphoning into the boat. This prevents seawater from contaminating the
engine flush.
14. Tag the ignition switch with an appropriate tag requiring the seawater inlet hose to be
reconnected prior to operating engine.
Alpha Seawater Pump Output Test
If an overheating problem exists, use this test to determine if a sufficient amount of water is being
supplied to cool the engine.
Observe the following information before proceeding with the test:
•
The boat must be in the water for this test. This test cannot be performed with a flush‑test
device and water hose.
•
The ability of this test to detect a problem is greatly dependent upon the accuracy with which
it is performed. An error in setting the engine RPM, timing the test or measuring the water
output will affect the overall accuracy of the test and may produce misleading results. To help
ensure accurate results, a shop tachometer with an error of less than 5 percent should be
used. Do not use the boat tachometer, as it may not have the necessary precision. Use a stop
watch to time the duration of the test to help ensure that the accuracy is maintained within one
second. Use a 9.5 L (10 US qt) or larger capacity container to measure the water output.
•
Due to the manner in which this test is performed, it may not be possible to detect a marginal
condition or a high‑speed water pump output problem.
1. Remove the water hose that is between the transom and the power steering cooler (if
equipped), and replace with another hose of the same diameter and approximately 1 m
(3 ft) longer. The hose should have a wall thickness to prevent it from kinking when performing
the test. Clamp the hose at the pump outlet only, not at the engine cooler end.
Page 14 / 24
a
a -
Water tube
b -
Hose clamp
c -
Water hose
c
b
7802
90-899883183 DECEMBER 2007
SECTION - 9
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