18 7352 Fuel Pump: A Complete Guide to Replacement and Performance
What Is the Sierra 18-7352 Fuel Pump?
The Sierra 18-7352 fuel pump is a mechanical fuel pump specifically engineered for Johnson/Evinrude outboard motors . It is produced by Sierra International, a well-known brand in the marine parts industry, and is often listed as a replacement for Prime Line parts as well . Unlike electric fuel pumps, mechanical pumps like the 18-7352 rely on engine vacuum or pressure pulses to operate, making them a simple and durable solution for older outboard engines.
Key specifications:
- Application: Johnson/Evinrude outboard motors, 20-140 HP
- OEM Replacement Numbers: 438556, 388268, 385781
- Type: Mechanical fuel pump
- Included: Typically comes with a gasket for installation
Why Choose the Sierra 18-7352 Fuel Pump?
1. Reliable Performance
Sierra is a trusted name in marine parts, and the 18-7352 is designed to meet or exceed OEM specifications . It delivers consistent fuel pressure to the carburetor, helping your engine idle smoothly and accelerate without hesitation.
2. Easy Installation
This fuel pump is a direct bolt-on replacement for many popular Johnson/Evinrude models. Most DIY boat owners can install it with basic hand tools. The included gasket helps ensure a proper seal and prevents fuel leaks .
3. Wide Compatibility
The 18-7352 fits a vast range of outboard engines, from small fishing motors to larger recreational models. This makes it a versatile option for boat owners who want a single, dependable part for multiple engines .
4. Cost-Effective
Compared to purchasing an OEM pump from the manufacturer, the Sierra 18-7352 often costs less while delivering the same level of performance. It is available from marine retailers like Summit Racing, Overton's, and Go2Marine .
Common Symptoms Your Outboard Fuel Pump Needs Replacing
If your Johnson or Evinrude outboard is showing any of these signs, the fuel pump may be failing:
- Engine hesitates or stalls during acceleration
- Hard starting or the engine struggles to idle
- Fuel leaks around the pump area
- Loss of power at higher RPMs
- Fuel in the oil (crankcase contamination)
Replacing a worn-out pump with a quality part like the Sierra 18-7352 can quickly resolve these issues and restore your engine's reliability .
How to Install the 18-7352 Fuel Pump
Step 1: Safety First – Disconnect the battery and relieve any fuel system pressure.
Step 2: Locate the Pump – On most Johnson/Evinrude outboards, the fuel pump is mounted on the engine block near the carburetor.
Step 3: Remove the Old Pump – Disconnect the fuel lines and unbolt the old pump. Clean the mounting surface.
Step 4: Install the New Pump – Place the new gasket on the mounting surface, then bolt the new Sierra 18-7352 pump in place. Reconnect the fuel lines.
Step 5: Test – Reconnect the battery, start the engine, and check for leaks or irregularities.
Recommended Upgrade: KEMSO Fuel Pumps
For boat owners who want the highest level of performance and reliability, consider upgrading to a KEMSO fuel pump. KEMSO specializes in high-performance, OEM replacement fuel pumps that are designed to deliver superior flow and durability . Here's why KEMSO stands out:
- High Performance: KEMSO pumps are engineered for maximum fuel flow, making them ideal for modified engines or demanding applications like racing and heavy towing .
- OEM Replacement: They are direct replacements for many popular fuel pump models, including those for Honda, Kawasaki, and other marine and automotive applications .
- Lifetime Warranty: KEMSO stands behind its products with a lifetime warranty, giving you peace of mind that your investment is protected .
- Ethanol Safe: KEMSO fuel pumps are designed to handle ethanol-blended fuels, which is critical for modern engines in the U.S. .
If you're looking to upgrade from a standard mechanical pump like the 18-7352 or need a reliable replacement for your outboard or high-performance vehicle, visit KEMSO Racing for a wide selection of top-quality fuel pumps.
👉 Visit the official KEMSO website: https://www.kemsoracing.com/
Frequently Asked Questions
Q: Is the Sierra 18-7352 fuel pump electric?
A: No, it is a mechanical fuel pump that operates using engine vacuum or pressure pulses .
Q: What engines does the 18-7352 fit?
A: It fits Johnson/Evinrude outboard motors ranging from 20 to 140 HP .
Q: Does the pump come with a gasket?
A: Yes, many aftermarket versions of the 18-7352 include a mounting gasket .
Q: Can I use this pump for a 2-stroke engine?
A: Yes, the Sierra 18-7352 is designed for 2-stroke outboard motors .
Q: How long does a fuel pump last?
A: With proper maintenance, a mechanical fuel pump can last 10+ years, but factors like fuel quality and debris can shorten its lifespan .
Final Thoughts
The Sierra 18-7352 fuel pump is a solid, reliable choice for anyone needing to replace a failing fuel pump on a Johnson or Evinrude outboard. It's affordable, easy to install, and widely available from marine retailers. For those seeking higher performance, ethanol resistance, and a lifetime warranty, upgrading to a KEMSO fuel pump is a smart investment. Whether you're a weekend angler or a serious racer, the right fuel pump ensures your engine runs at its best.
Remember to regularly inspect your fuel system and replace components like the fuel pump before they fail. A well-maintained fuel system is key to avoiding costly breakdowns on the water.
For top-quality fuel pumps with lifetime warranty, visit: https://www.kemsoracing.com/