Sierra Fuel Injector 18-33104, Replaces 802632T/802632, Fits MCM/MIE 7.4L MPI L29

The Sierra 18-33104 is a metal fuel injector engineered as a direct replacement for MCM/MIE 7.4L MPI L29 marine engines. It delivers precise fuel metering through a needle-valve design, restoring proper spray pattern and fuel delivery on engines with a worn, clogged, or failed factory injector. The body measures 5 x 4 x 1 inches and features a threaded inlet connection sized at 4 inches paired with an NPT outlet connection, with two ports built into the housing for correct fuel routing. Constructed of metal for durability in the marine engine environment, this injector is built to the same fit and function as the original equipment part it replaces.

This injector is intended for MCM/MIE 7.4L MPI L29 applications and cross-references directly to OEM part numbers 802632T and 802632, making it a straightforward swap for boat owners and marine technicians performing fuel system service or troubleshooting a rough-running or misfiring engine.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-33104
• Product Type: Fuel Injector
• Material: Metal
• Valve Type: Needle Valve
• Item Dimensions: 5 x 4 x 1 inches
• Weight: 0.21 pounds
• Inlet Connection Size: 4 inches
• Inlet Connection Type: Threaded
• Outlet Connection Type: NPT
• Outlet Connection Size: 0.03 inches
• Number of Ports: 2
• UPC: 808282341671

Fitment

• MCM/MIE 7.4L MPI L29

Replaces (OEM)

• 802632T
• 802632

Frequently Asked Questions

What engines does the Sierra 18-33104 fuel injector fit? The Sierra 18-33104 fits MCM/MIE 7.4L MPI L29 marine engines.

What OEM part numbers does the 18-33104 replace? It cross-references directly to OEM numbers 802632T and 802632, so either of those original part numbers can be replaced with Sierra 18-33104.

What material is the 18-33104 fuel injector made of? It is constructed of metal, matching the durability of the original equipment injector it replaces.

What are the dimensions of the 18-33104 injector? The Sierra 18-33104 measures 5 x 4 x 1 inches.

How much does the 18-33104 fuel injector weigh? It weighs 0.21 pounds.

What type of valve does this injector use? The 18-33104 uses a needle valve design for fuel metering.

What connection type is the inlet on the 18-33104? The inlet is a 4 inch threaded connection.

What type of outlet connection does the 18-33104 have? The outlet connection is NPT, sized at 0.03 inches.

How many ports does the Sierra 18-33104 have? The injector housing has 2 ports.

Is the Sierra 18-33104 a direct OEM replacement? Yes, the 18-33104 is a direct replacement for MCM/MIE 7.4L MPI L29 engines, matching the fit and function of OEM 802632T and 802632.

What is included when I order the 18-33104? The order includes one Sierra 18-33104 fuel injector.

What is the UPC for the Sierra 18-33104? The UPC for the Sierra 18-33104 fuel injector is 808282341671.