Throttle/Shift Remote Control And Cables - Mercury MerCruiser 8.1S Installation Manual

GASOLINE ENGINE 8.1 S INBOARD MODELS

Throttle/Shift Remote Control and Cables

Remote control and shift cable must position transmission shift lever exactly as
shown or transmission failure may occur. Do not remove poppet ball or spring.
Damage caused to transmission as a result of improper shift lever positioning will not be
covered by warranty.
To ensure proper shift and throttle operation, we recommend the use of a Quicksilver
remote control and cables. Refer to Quicksilver Accessories Guide for selection. If a
control other than Quicksilver is to be used, control must provide a shift cable travel of
2-3/4 in. (70 mm).
Seawater Connections
SEAWATER PICKUP AND HOSE
IMPORTANT: DO NOT install water pickup directly in line with propeller, as pickup
may create turbulence and allow air to flow into the propeller slipstream. This will
cause propeller ventilation and will adversely affect boat performance.
Water pickup must be large enough to permit sufficient water flow to engine seawater pickup
pump for adequate engine cooling. Water pickup should be located as close to seawater
pickup pump inlet as possible and in an area where an uninterrupted, solid stream of water
will flow past when boat is underway.
Water inlet hose connections must be made with wire reinforced hose of adequate wall
thickness to prevent it from collapsing from pump suction. Be sure to secure hose
connections with hose clamps. Secure hose to prevent contact with any moving parts.
Seawater Pickup Hose Inner Diameter
SEACOCK
Seacock used must have an internal cross-sectional area equal to or greater than seawater
hose to prevent restricting water flow. A brass ball or gate valve is required.
Seacock Size Internal Cross-Sectional Area 
Install the seacock in an area where it will be easily accessible and supported adequately
to prevent hose fatigue.
SEAWATER STRAINER
Strainer used must be of sufficient size to ensure that an adequate supply of water will be
maintained for cooling engine.
Seawater Strainer Minimum Flow Rate
The seawater strainer should be installed in an area where it will be easily accessible for
inspection and cleaning. The strainer should be installed in water inlet hose after the
seacock (water inlet valve) to allow operator to shut off water when cleaning strainer.
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CAUTION
1-1/4 in. (32 mm)
1-1/4 in. (32 mm)
30 U.S. gal/min. (114 L/min.)
INDEX