25/30 MODELS
IMPORTANT:
All
intake manifold components
must
be
perfectly clean before assembly. Do not
use a strong carburetor
cleaner or hot soaking
tank.
Place leaf valves
on
leaf plate.
If
new valves do
not seat
on
the leaf plate, turn the leaf valves over.
IMPORTANT: Used leaf valves must not
be
turned over for reuse. Leaf valve may break when
returned to service, causing serious powerhead
damage.
If any leaf valves are standing open, apply light
pressure using a pencil eraser. If leaf valve closes
with light pressure, valve
is
acceptable. If not,
inspect
leaf plate for high spots or burrs.
IMPORTANT:
Do
not lap leaf plate. If plate is too
smooth, the
leaf valves may stick closed after off-
season storage.
FUEL SYSTEM
INTAKE MANIFOLD
Viewed from the back (leaf stop) side, the align-
ment notches must face
as
shown. The port notch
will face one
o'clock and the starboard notch will
face
11
o'clock. Failure to follow this procedure
will cause premature
leaf valve failure.
Center the leaf valves
on
the plate using the index
marks.
1
2
1.
Alignmentnotches
DR146s1
2.
Index marks •
Center the leaf stops, and tighten the leaf valve
screws to a torque of 25 to
35
in.
Ibs.
(3
to 4 N·m).
12686
E
o
U
Qj
)(
~
Qj
~
ii
167 E
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