SERVICE MANUAL NUMBER 24
SEAWATER COOLED MODELS
2.
Models With Sterndrive (Alpha) Mounted Seawater Pump - remove water inlet hose,
which runs between gimbal housing water tube and engine, and replace with another
hose of same diameter, but approximately 3 ft. (1 m) longer. Hose should be of adequate
wall thickness to prevent it from kinking when performing test. Clamp hose at gimbal
housing water tube only. Do not clamp hose at engine end.
c
b
a
72614
a - Water Tube
b - Hose Clamp
c - Water Hose
3.
4.
Place an 8 U.S. qt. (7.6 L) or larger container near unclamped end of hose.
With assistance of another person, start engine and adjust speed to exactly 1000 rpm
while holding unclamped end of hose on connection on engine. Remove hose from con-
nection on engine and direct water flow into container for exactly 15 seconds. At the end
of 15 seconds, direct the water flow overboard, return engine to idle and stop engine.
Reconnect hose to engine.
5.
6.
Measure quantity of water discharged into container and compare with specifications
given in the following chart.
Repeat test four times to check repeatability of results.
Engine Mounted Seawater Pump Output for a 15 Second Period
7.5
U.S. Qt. (7.1 L) Minimum
Alpha Sterndrive Seawater Pump Output for a 15 Second Period
Drive Unit Gear Ratio
Minimum Quantity
U.S. Qts.(L)
1.98:1
1.84:1
1.65:1
1.50:1
1.32:1
3.0 (2.8)
3.3 (3.1)
3.6 (3.4)
4.0 (3.8)
4.5 (4.3)
NOTE: Refer to Alpha Sterndrive Service Manual for repair of seawater pump.
Index
90-861327--1
OCTOBER 1999
Page 6A-11
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | Mercury MerCruiser 305 CID, Mercury MerCruiser 350 CID |
| Model Year | 1998, 1999, 2000, 2001 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
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