2004 SR Johnson 2 Stroke 9.9, 15, 25, 30 HP Outboards Service Manual, Page 165Get this manual
FUEL SYSTEM INTAKE MANIFOLD 1 2
2530 Model
Inspection
IMPORTANT: Do not lift or bend leaf valves by
handThis may damage them so they may not seal properly or may break after the engine is returned to serviceInspect 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 tightnessIf loose, tighten using Screw Lock The check valve disk must be intact and free to move inside the valveThe check valve screen must be clean