Carburetor Service Valve Kit – Fits Johnson/Evinrude 9.9HP/15HP (Replaces 175158, 437228)
Carburetor Service Valve Kit – Fits Johnson/Evinrude 9.9HP/15HP (Replaces 175158, 437228) is backordered and will ship as soon as it is back in stock.
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Carburetor Service Valve Kit – Fits Johnson/Evinrude 9.9HP/15HP (Re...
Carburetor Service Valve Kit – Fits Johnson/Evinrude 9.9HP/15HP (Replaces 175158, 437228) is backordered and will ship as soon as it is back in stock.
Product Details
This Carburetor Service Valve Kit is designed for Johnson/Evinrude 9.9HP & 15HP 2-Stroke engines that use an electric primer valve. This kit converts the engine to a thru-the-primer maintenance system, simplifying the process of applying engine tuner or fogging oil. Note: This kit expressly excludes 1993 models of 9.9HP and 15HP engines.
This kit serves as a direct replacement for Sierra interchange numbers 18-7044 and 18-7044-1, as well as Johnson/Evinrude OEM parts 175158 (service valve) and 437228 (cover & gasket assembly).
- Allows for direct injection of engine tuner and fogging oil through the primer system.
- Engineered as a direct-fit replacement for the original components.
- Maintains full functionality of the electric primer and its manual backup operation.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Superseded By |
|---|---|---|
| Sierra | 18-7044 | 18-7044-1 |
| Sierra | 18-7044-1 | |
| Johnson/Evinrude | 175158 | |
| Johnson/Evinrude | 437228 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
| Brand | Model | Rated HP | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|---|
| Johnson/Evinrude | All models with primer valve | 9.9, 15 | 2-Stroke | 175158, 437228 | Excludes 1993 9.9HP & 15HP models |
Technical Specs
- Product Type
- Carburetor Service Valve Kit
- Installation
- Direct replacement
- Fuel Type
- Gasoline (Marine)
- Connection
- Fits OEM primer valve systems
- Weight
- 0.2 lbs (0.09 kg)
- Other Technical Attributes
- Allows injection of engine tuner and fogging oil through primer valve while maintaining primer functionality
What’s in the Box
- 1 x Service Valve w/ O-ring (Replaces 175158)
- 1 x Cover & Gasket Assembly (Replaces 437228)
Installation Notes
- For safety, disconnect the battery and fuel line.
- Locate and access the electric primer valve on the engine.
- Carefully remove the original cover and gasket assembly.
- Remove the old service valve it covers.
- Install the new service valve with its supplied O-ring, ensuring a secure fit.
- Place the new cover and gasket assembly over the valve.
- Secure the new cover according to the engine manufacturer's torque specifications.
- Reconnect the fuel line and battery, then check for leaks and test the primer's function.
Troubleshooting & FAQ
What is the purpose of this service valve kit?
This kit allows engines with an electric primer to be converted to a thru-the-primer maintenance system. It enables the easy injection of engine tuner and fogging oil directly through the primer valve, making regular maintenance more efficient.
Will I lose my primer function after installing this?
No. Both the electric primer and its manual backup operation remain fully functional and unchanged after installation.
Does this kit fit 1993 Johnson/Evinrude 9.9HP or 15HP models?
No. The compatibility data explicitly excludes the 1993 model year for both 9.9HP and 15HP Johnson/Evinrude engines.
How do I use the valve for maintenance?
After installation, you can inject approved engine tuner or fogging oil directly into the service port on the valve. This provides a simple, direct path into the fuel system for maintenance without disassembly.
What are signs my original valve might need replacing?
Signs of failure in the original primer system can include fuel leaks around the primer valve, difficulty starting the engine, or a primer that no longer functions correctly when activated.
Is this a direct replacement for Sierra part 18-7044?
Yes. Sierra 18-7044 was superseded by part number 18-7044-1, which is included in this kit. It is a direct, updated replacement.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
Shipping speed & cost
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns
Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
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