Sierra 18-7256 Marine Fuel Pump for GM 4 & 6 Cylinder 153, 230, 250, 292 Engines

The Sierra 18-7256 is a mechanical marine fuel pump engineered as a direct replacement for GM 4 and 6 cylinder marine engines displacing 153, 230, 250, and 292 cubic inches. It mounts to the engine block via a flange with I.D. Number 6790 and draws fuel through a mechanical, engine-driven action rather than an electric motor, matching the original factory pump arrangement used on these GM-based marine powerplants.

Every Sierra 18-7256 fuel pump ships complete with its mounting gasket, so the pump can be installed directly against the engine block without sourcing a separate gasket. The pump is built to original equipment specification and is a recognized equivalent to the Crusader 32722 fuel pump, making it suitable for boats and stern drives that were originally fitted with that pump. It carries a limited warranty from Sierra.

This pump is intended for inboard and sterndrive marine applications using the GM 4 and 6 cylinder 153, 230, 250, and 292 cid engine family. Confirm your engine's cubic inch displacement and existing flange configuration before ordering to ensure correct fitment.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-7256
• Product Type: Fuel Pump
• Flange I.D. Number: 6790
• Engine Fitment: GM (4 & 6 cylinder) 153, 230, 250, 292 cid
• Included Components: Mounting gasket
• OEM Equivalent Part Number: Crusader 32722
• Weight: 1.77 pounds
• Fuel Type: Gasoline
• Inlet Connection Type: Flange
• Mounting Type: Flange mount
• Connector Type: NPT
• Warranty: Limited warranty

Fitment

• GM 4 & 6 cylinder engines: 153, 230, 250, 292 cubic inch displacement

Replaces (OEM)

• Crusader 32722

Frequently Asked Questions

What engines does the Sierra 18-7256 fuel pump fit? It is built for GM 4 and 6 cylinder marine engines displacing 153, 230, 250, and 292 cubic inches, matching the flange I.D. Number 6790 configuration.

Is a mounting gasket included with the 18-7256 fuel pump? Yes, the Sierra 18-7256 ships with its mounting gasket included, so no separate gasket purchase is needed for installation.

Is the Sierra 18-7256 a mechanical or electric fuel pump? The 18-7256 is a mechanical fuel pump, driven by the engine rather than an electric motor, consistent with the original GM factory setup on these engines.

Does the Sierra 18-7256 cross-reference to a Crusader part number? Yes, this pump is recognized as equivalent to Crusader part number 32722.

How much does the 18-7256 fuel pump weigh? The Sierra 18-7256 weighs 1.77 pounds.

What flange size does the 18-7256 fuel pump use? It uses a flange with I.D. Number 6790, which lines up with the mounting pattern on GM 153, 230, 250, and 292 cid marine engines.

What type of fuel connection does this pump have? The 18-7256 has a flange-type inlet connection with an NPT connector fitting, designed for gasoline fuel systems.

Is the Sierra 18-7256 genuine Sierra or aftermarket? It is a genuine Sierra International fuel pump, manufactured to original equipment specification as a direct GM engine replacement, not a generic aftermarket part.

How is the 18-7256 fuel pump mounted to the engine? It uses a flange mount configuration, bolting directly to the engine block using the included mounting gasket.

Does the Sierra 18-7256 come with a warranty? Yes, the 18-7256 fuel pump is backed by Sierra's limited warranty.

Will the 18-7256 fit a GM V-8 marine engine? No, the 18-7256 is designed for GM 4 and 6 cylinder engines (153, 230, 250, 292 cid); GM V-8 applications require a different Sierra fuel pump part number.