Carburetor Fuel Filter – Fits Mercury MerCruiser Holley 4-Barrel (Replaces 35-93568)
Carburetor Fuel Filter – Fits Mercury MerCruiser Holley 4-Barrel (Replaces 35-93568) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Product Details
This Carburetor Fuel Filter – Fits Mercury MerCruiser Holley 4-Barrel (Replaces 35-93568) is designed for MerCruiser stern drive engines equipped with Holley 4-barrel carburetors. It is primarily used on V8 engines from approximately 1978 to 1998, installing directly into the inlet fitting to ensure clean fuel delivery.
This part is a direct replacement for Sierra 18-7717 and Mercury MerCruiser 35-93568.
- Installs inside the fuel inlet fitting of Holley marine carburetors.
- Designed specifically for marine gasoline applications.
- Engineered to meet OEM specifications for fit and function.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Mercury MerCruiser | 35-93568 |
| Sierra | 18-7717 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This filter is designed for a wide range of high-performance MerCruiser engines equipped with Holley 4-barrel carburetors.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| MerCruiser | 370 TRS | 370 | 4-Stroke | 1978–1985 | 35-93568 | GM 454 V8 engine |
| MerCruiser | 400 TRS | 400 | 4-Stroke | 1980–1986 | 35-93568 | GM 454 V8 engine |
| MerCruiser | 420 | 420 | 4-Stroke | 1987–1993 | 35-93568 | |
| MerCruiser | 425 | 425 | 4-Stroke | 1987–1993 | 35-93568 | |
| MerCruiser | 425 GEN. V | 425 | 4-Stroke | 1987–1993 | 35-93568 | |
| MerCruiser | 440 TRS | 440 | 4-Stroke | 1983–1986 | 35-93568 | GM 454 V8 engine |
| MerCruiser | 460 TRS | 460 | 4-Stroke | 1983–1986 | 35-93568 | |
| MerCruiser | 465 | 465 | 4-Stroke | 1990–1994 | 35-93568 | |
| MerCruiser | 465 GEN. V | 465 | 4-Stroke | 1990–1994 | 35-93568 | |
| MerCruiser | 500 BULLDOG | 500 | 4-Stroke | 1990–2001 | 35-93568 | |
| MerCruiser | 500 GEN V | 500 | 4-Stroke | 1994–1996 | 35-93568 | |
| MerCruiser | 500 GEN. VI | 500 | 4-Stroke | 1996–1998 | 35-93568 | |
| MerCruiser | 525 SC | 525 | 4-Stroke | 1991–1996 | 35-93568 | |
| MerCruiser | 525 SC - GEN. V | 525 | 4-Stroke | 1991–1996 | 35-93568 | |
| MerCruiser | 525 SC - GEN VI | 525 | 4-Stroke | 1996–1999 | 35-93568 | |
| MerCruiser | 575 | 575 | 4-Stroke | 1986–1991 | 35-93568 | |
| MerCruiser | 800 SC GEN V | 800 | 4-Stroke | 1992–1998 | 35-93568 | |
| MerCruiser | 900 SC | 900 | 4-Stroke | 1998–2000 | 35-93568 | |
| MerCruiser | 900 SC DRY SUMP | 900 | 4-Stroke | 2000–2004 | 35-93568 |
Technical Specs
- Product Type
- Carburetor Fuel Filter
- Installation
- Inlet fitting of Holley marine carburetors
- Fuel Type
- Gasoline
- Connection
- Fits behind the fuel inlet fitting
- Dimensions
- Height: 5.13 in; Width: 4.0 in; Length: 0.25 in
- Fitting Type
- For Holley 4-barrel carburetors
- Other Technical Attributes
- Specifically designed for marine applications
What’s in the Box
- 1 x Carburetor Fuel Filter (35-93568)
Installation Notes
- Ensure the engine is off, cool, and the battery is disconnected. Relieve fuel system pressure according to your engine's service manual.
- Place absorbent rags under the carburetor fuel inlet to catch any spills.
- Carefully loosen and remove the fuel line from the carburetor's inlet fitting.
- Unscrew the large inlet fitting from the carburetor body. The old filter is located inside this fitting.
- Remove the old filter and spring. Clean the fitting threads and interior housing of any debris.
- Insert the new filter into the inlet fitting in the same orientation as the original.
- Reinstall the inlet fitting into the carburetor body and torque to the manufacturer's specification.
- Reconnect the fuel line to the inlet fitting and tighten securely.
- Reconnect the battery, prime the fuel system, and check for leaks before starting the engine.
Troubleshooting & FAQ
How do I know if this fuel filter fits my engine?
This filter is specifically for MerCruiser engines with Holley 4-barrel carburetors. The surest method is to check your OEM part number against the references 35-93568 and Sierra 18-7717. You should also consult the compatibility table on this page.
Where is this filter located?
This small, sintered bronze filter is installed directly inside the large fuel inlet nut (fitting) on a Holley marine carburetor. It is not an inline canister filter.
What are the signs of a clogged carburetor fuel filter?
Common symptoms include engine hesitation or bogging under acceleration, difficulty starting, rough idling, or a general loss of top-end power. Since debris can be microscopic, these symptoms may develop gradually.
How often should this filter be replaced?
For preventative maintenance, it's wise to inspect or replace this filter annually or every 100 hours of operation, especially if you have an older fuel tank or use ethanol-blended fuels. Always replace it if you experience fuel delivery issues.
Is this the only fuel filter on my engine?
No. Most marine fuel systems have at least two filters: a primary water-separating fuel filter located between the tank and the engine, and a secondary filter on the engine itself. This part is a secondary, last-chance filter located at the carburetor inlet.
Can I clean and reuse my old filter?
It is not recommended. The pores in a sintered bronze filter can become permanently clogged with microscopic particles that are not easily removed. Given the low cost and critical function, replacement is the safest option.
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.
Payment & Security
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