Primer Knob for Mercury Mariner MerCruiser Outboard 6-25 HP- 128022

Primer Knob for Mercury Mariner MerCruiser Outboard

This Primer Knob is a direct replacement for Mercury, Mariner, and MerCruiser outboard engines in the 6-25 HP range, used to manually prime the fuel system for easier starting. Compatible with OEM designs, this knob restores proper priming function.

Overview

This Primer Knob is designed for Mercury, Mariner, and MerCruiser outboard engines from 6 to 25 HP, providing a reliable way to prime the fuel system before starting. Made from durable plastic or rubber, it replaces worn or broken primer knobs to ensure consistent fuel delivery. This Primer Knob is a simple but essential component for maintaining your outboard's starting performance.

Built For Performance

• Direct replacement for original primer knobs on select outboards
• Ergonomic design for easy grip and operation
• Constructed from UV-resistant materials for longevity
• Smooth push-button action for precise priming
• Compatible with Mercury, Mariner, and MerCruiser models 6-25 HP

Fits These Machines

• for Mercury outboard 6-25 HP
• for Mariner outboard 6-25 HP
• for MerCruiser outboard 6-25 HP

On-The-Job Use

• Used to prime the fuel system before starting a cold outboard engine
• Commonly employed on small to mid-size outboards for fishing, recreational boating, or utility use
• Helps reduce starting effort and prevent flooding
• Essential for engines that have been sitting for extended periods

Specs At A Glance

Good To Know

Q: Will this primer knob fit my 15 HP Mercury outboard? A: This knob is designed for Mercury outboards in the 6-25 HP range, so it should fit most models within that range, but confirm compatibility with your engine's original part.

Q: Is this knob the same as the original equipment? A: It is a direct replacement aftermarket part designed to match OEM specifications for fit and function.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.