Sierra 18-7508 Power Steering Pump, Replaces 16792A39, 16792A33, MerCruiser MCM/MIE GM V6 & V8 283/305/350 cid Engines

The Sierra 18-7508 is a marine power steering pump built as a direct replacement for MerCruiser MCM/MIE stern drive applications powered by GM V6 and V8 engines in the 283, 305, and 350 cubic inch displacement range. It is engineered to meet or exceed OEM performance, supplying the hydraulic pressure needed to actuate the sterndrive's steering cylinder and deliver reliable, consistent steering response at the helm.

This pump is a bolt-on replacement designed to install using the same mounting points and drive configuration as the original equipment pump it replaces, so it drops into the existing power steering circuit without modification. It is finished in white and ships as a single unit ready for installation. Every Sierra power steering pump is backed by Sierra's industry leading warranty, giving boat owners confidence that a failed or worn original pump can be swapped for a unit built to the same standard.

Because steering response and safety depend on a properly functioning pump, replacing a worn, leaking, or noisy power steering pump with the 18-7508 restores factory-level steering feel on GM-powered MerCruiser MCM/MIE sterndrive boats.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-7508
• Category: Engine Parts
• Weight: 10.18 pounds
• Package Dimensions: 9.9 x 9.8 x 8 inches
• Color: White
• Number of Items: 1
• UPC: 808282287221
• Fitment: MerCruiser MCM/MIE GM V6 & V8 (283, 305 & 350 cid) engines

Fitment

• MerCruiser MCM/MIE sterndrives with GM V6 & V8 (283, 305 & 350 cid) engines

Replaces (OEM)

• 16792A39
• 16792A33

Frequently Asked Questions

What boats and engines does the Sierra 18-7508 power steering pump fit? The Sierra 18-7508 is built for MerCruiser MCM/MIE sterndrives powered by GM V6 and V8 engines in the 283, 305, and 350 cubic inch displacement range.

What OEM part numbers does the 18-7508 replace? This pump replaces OEM numbers 16792A39 and 16792A33, so it can be used as a direct swap for either of those original part numbers.

Is the Sierra 18-7508 an OEM or aftermarket power steering pump? It is an aftermarket replacement pump manufactured by Sierra and built to meet or exceed the original MerCruiser OEM specification for these applications.

How much does the 18-7508 power steering pump weigh? The pump weighs 10.18 pounds.

What color is the Sierra 18-7508 power steering pump? It is finished in white.

What is included when I order the 18-7508? Each order includes one complete power steering pump, the Sierra 18-7508, ready to install.

Does the 18-7508 come with a warranty? Yes, the Sierra 18-7508 is backed by Sierra's industry leading warranty.

What are the package dimensions of the 18-7508? The pump ships in packaging measuring 9.9 x 9.8 x 8 inches.

Will the 18-7508 work on GM V8 350 cid MerCruiser applications? Yes, the 283, 305, and 350 cid GM V6 & V8 MCM/MIE applications are all covered by the Sierra 18-7508.

Is installation of the 18-7508 straightforward for a DIY boat owner? The 18-7508 is designed as a direct replacement for the original MCM/MIE power steering pump, so it mounts in the same location using the existing steering circuit connections.

How do I know if my power steering pump needs replacing? Symptoms like stiff or inconsistent steering, pump noise, or fluid leaks on a MerCruiser MCM/MIE GM V6 or V8 sterndrive typically indicate it is time to replace the pump with a unit like the Sierra 18-7508.