The 1990 Mercruiser 3.0 Fuel Pump is a marine-specific mechanical pump designed for inboard engines. It delivers consistent fuel flow to the carburetor for optimal engine performance. This durable pump is built to withstand harsh marine environments.

The 1990 Mercruiser 3.0 Fuel Pump is a mechanical diaphragm-type pump designed for marine applications. Key specifications include:

Size: Approximately 4.5 inches in diameter and 3 inches in height.

Grade: Meets OEM standards for marine fuel delivery systems.

Viscosity: Compatible with gasoline viscosities ranging from 0.5 to 1.0 cSt at operating temperatures.

Buoyancy: Not applicable (non-submersible design).

Material: Housing is typically made of cast aluminum or steel, with a nitrile or Viton diaphragm for fuel resistance.

Pressure Rating: Delivers 4-6 psi fuel pressure at idle, with a flow rate of around 30-35 gallons per hour.

Mounting: Bolts directly to the engine block, driven by the camshaft eccentric.

Compatibility: Designed for use with unleaded gasoline (87-93 octane).

Weight: Approximately 1.5-2 pounds.