Sierra Fuel Pressure Regulator 18-33207, Replaces 860349A1, for Mercruiser MCM/MIE 7.4L/LX MPI, 4545 Mag MPI, 502 Mag MPI, MIE 8.2L MPI

The Sierra 18-33207 is a fuel pressure regulator built for Mercruiser MCM/MIE 7.4L/LX MPI, 4545 Mag MPI, 502 Mag MPI, and MIE 8.2L MPI engines. It mounts on the fuel cooler and regulates fuel pressure delivered to the multi-port fuel injection system, holding the fuel rail at the pressure the engine's MPI system needs to meter fuel correctly. The regulator body is constructed of metal for durability in the engine bay environment. This part directly replaces OEM number 860349A1, so it installs in place of the original regulator without modification. Sierra manufactures this component to original equipment specification, making it a straightforward, correctly-fitting replacement for a worn or failing fuel pressure regulator on these Mercruiser MPI engines. Because fuel pressure regulation affects air/fuel ratio, engine performance, and emissions, replacing a weak or leaking regulator with this unit restores proper fuel delivery. It is compact, measuring 0.39 x 0.39 x 0.39 inches, and weighs 0.12 pounds.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-33207
• Category: Mercruiser Fuel Pressure Regulators
• Replaces (OEM): 860349A1
• Fitment: MCM/MIE 7.4L/LX MPI, 4545 Mag MPI, 502 Mag MPI, MIE 8.2L MPI
• Mounting Location: Fuel Cooler
• Material: Metal
• Item Dimensions: 0.39 x 0.39 x 0.39 inches
• Weight: 0.12 pounds
• UPC: 808282341695

Fitment

• Mercruiser MCM/MIE 7.4L/LX MPI
• Mercruiser 4545 Mag MPI
• Mercruiser 502 Mag MPI
• Mercruiser MIE 8.2L MPI

Replaces (OEM)

• 860349A1

Frequently Asked Questions

What does the Sierra 18-33207 fuel pressure regulator fit? The Sierra 18-33207 fits Mercruiser MCM/MIE 7.4L/LX MPI, 4545 Mag MPI, 502 Mag MPI, and MIE 8.2L MPI engines, and mounts on the fuel cooler.

What OEM part number does 18-33207 replace? Sierra 18-33207 replaces OEM number 860349A1, so it can be installed as a direct substitute on applicable Mercruiser MPI engines.

Where does this fuel pressure regulator mount? It mounts directly on the fuel cooler on the applicable Mercruiser MCM/MIE MPI engines.

What material is the Sierra 18-33207 made of? This fuel pressure regulator has a metal construction, matching original equipment build quality for these Mercruiser fuel systems.

How much does the 18-33207 fuel pressure regulator weigh? It weighs 0.12 pounds.

What are the dimensions of the Sierra 18-33207? The regulator measures 0.39 x 0.39 x 0.39 inches.

Is the Sierra 18-33207 a genuine Mercruiser part or aftermarket? It is a Sierra-manufactured fuel pressure regulator built to original equipment specification, offered as a replacement for OEM number 860349A1 rather than a Mercruiser-branded part.

Does 18-33207 fit the Mercruiser 502 Mag MPI? Yes, the Sierra 18-33207 fuel pressure regulator is listed as fitting the Mercruiser 502 Mag MPI engine.

Will this regulator work on a Mercruiser 4545 Mag MPI engine? Yes, Sierra part 18-33207 fits the Mercruiser 4545 Mag MPI, along with the MCM/MIE 7.4L/LX MPI and MIE 8.2L MPI engines.

What is included when you order the 18-33207? The order includes one Sierra 18-33207 fuel pressure regulator, ready to mount on the fuel cooler of the applicable Mercruiser MPI engine.

Why would I need to replace my fuel pressure regulator? A failing fuel pressure regulator can cause incorrect fuel delivery to an MPI engine; the Sierra 18-33207 replaces OEM part 860349A1 to restore correct fuel pressure on applicable Mercruiser engines.