Mercury 3W3Z-9424-BA Manifold Assembly - Inlet

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During installation, ensure the gasket mating surfaces are clean and free of damage. Tighten the throttle body mounting nuts to the specified torque.

Use a gasket scraper to remove all traces of sealant and old gasket material, then clean the mating surfaces with lacquer thinner or acetone. If there's old sealant or oil on the mating surfaces when the manifold is installed, oil or vacuum leaks may develop. When working on the heads and block, cover the lifter valley with shop rags to keep debris out of the engine. Use a vacuum cleaner to remove any gasket material that falls into the intake ports in the heads.

Disconnect the electrical connectors from the ignition coils, camshaft sensor, coolant temperature sending unit, air charge temperature sensor, throttle positioner, idle speed control solenoid, EGR sensors, fuel injectors, and fuel charging assembly.