Installation Requirements; Boat Construction - Mercury SKI Instruction Manual

GASOLINE ENGINES SKI MODELS
ENGINE/PROPELLER SHAFT INSTALLATION ANGLE
The transmission and engine should be mounted so that the angle relative to horizontal is
as shown in the installation drawings. Refer to individual installation drawings for each spe-
cific engine and transmission.
Relative to horizontal, never install the engine with the front (pulley end) down.
IMPORTANT: On all engines, a high angle of installation [front (pulley end) of engine
up] along with low transmission oil levels can permit transmission pump cavitation
on some models when operating in rough water.
COUPLING
The coupling is a flange type coupler (available through Quicksilver Accessories). All cou-
pler bolts must be SAE Grade 8 (Metric Grade 10.9) or better, with a shoulder (grip length)
long enough to pass through the face mating plane of couplers. All coupler bolts must be
torqued to 50 lb. ft. (68 N·m).
PROPELLER SHAFT DIAMETER
Propeller shaft diameter should be of sufficient size for the type of application.

Installation Requirements

Boat Construction

ENGINE BED
Distance between starboard and port engine mount is 22-1/2 in. (572 mm). Engine bed must
position engine so that a minimum of 1/4 in. (6 mm) up and down adjustment still exists on
all 4 mounts after performing final engine alignment. This is necessary to allow for realigning
engine in the future.
NOTE: Although the engine mounts allow some adjustment, it is a good practice to ensure
that the front and rear mount locations in the vessel are in parallel planes. This may be
checked by tying a string from the left front mount location to the right rear mount location
and another from right front to left rear. The strings should touch where they cross.
ENGINE COMPARTMENT
Boating standards (NMMA, ABYC, etc.) and Coast Guard regulations must be ad-
hered to when constructing the engine compartment.
Care must be exercised in the design and construction of the engine compartment. Seams
must be located so that any rain water that may leak through the seams is directed away
from the air intake system. Water that runs onto the air intake may enter the engine and
cause serious damage to internal engine parts.
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