SEAWATER COOLED MODELS
SERVICE MANUAL NUMBER 23
3.
Check drain plug and lens cover bolts. Tighten securely. Do not overtighten cover bolts
or cover may warp and leak water into boat.
b
a
72644
a - Drain Plug
b - Lens Cover Bolts (2, One Hidden In This View)
4.
Open seacock, if equipped.
Seawater Pickup 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.
IMPORTANT: The following information should be observed before proceeding with
test:
•
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% should be used. The boat tachometer definitely
should not be used as its accuracy is questionable. A stop watch should be used
to time the duration of the test to help ensure that the accuracy is maintained
within one second. An 8 qt. (7.6 L) or larger capacity container should be used to
measure 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.
Page 6A-10
90-861326--1 MARCH 1999
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | Mercury MerCruiser 454 CID, Mercury MerCruiser 502 CID |
| Model Year | 1998, 1999, 2000, 2001 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
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Marine readers have rated Mercury MerCruiser GM V8 GM V8 454 CID 7.4L and 502 cid 8.2L Marine Engines Service Manual Number 23 5.0 out of 5.0 based on 1 product reviews. Just need the manual. Wrote review. Can't technically review what I haven't seen yet...