REPLACE AIR BOX HEATER IGNITION COIL, AIR PUMP, AND CHECK VALVE (M548A3)
Clean outside of pump assembly with cleaning compound. Do not submerge.
Inspect pump for cracks, dents, and general damage.
Remove three screws (1) and cover (2) from air pump (3).
Check for internal wear or damage. Replace air pump (3) if needed.
Install cover (2) with three screws (1) on air pump (3).
Check ignition coil as described in electrical troubleshooting (WP 0015 00). Replace ignition coil if defective.
Inspect clamps for breaks and excessive wear. Replace clamps that show either of these defects.