115
FUEL SYSTEM
INTAKE MANIFOLD
6
INTAKE MANIFOLD
Removal
Remove the powerhead. Refer to Powerhead
REMOVAL on p. 128.
Loosen and remove six intake manifold screws.
Remove intake manifold, leaf plate, and two gas-
kets. Discard gaskets.
Inspection
IMPORTANT: Do not lift or bend leaf valves by
hand. This may damage them so they may not
seal properly or may break after the engine is
returned to service.
Inspect the leaf plate assemblies for damage:
• The leaf valves and plate must not be distorted.
• The leaf valve tips must not be cracked or
chipped.
• The leaf stops must not be distorted or loose.
• Test leaf plate screw tightness. If loose, tighten
using Screw Lock.
• The check valve disk must be intact and free to
move inside the valve. The check valve screen
must be clean.
• Use a machinist's straightedge to check the flat-
ness of the leaf plate. The gasket surfaces must
be flat, ± 0.003 in. (0.08 mm).
12334
12333
9.9/15 Model
1. Leaf valve tips
2. Leaf stops
3. Check valve disk
12317
9.9/15 Model 12318
2
3
1
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