Carburetor Bowl Gasket – Fits Mercury/Mercruiser L4 & L6 Engines (Replaces 1399-99)
Carburetor Bowl Gasket – Fits Mercury/Mercruiser L4 & L6 Engines (Replaces 1399-99) 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
Carburetor Bowl Gasket – Fits Mercury/Mercruiser L4 & L6 Engine...
Product Details
This Carburetor Bowl Gasket – Fits Mercury/Mercruiser L4 & L6 Engines (Replaces 1399-99) is an essential component for ensuring a proper seal within the carburetor float bowl. It is designed as a direct replacement for factory original equipment (OEM) parts on various early Mercury and Mercruiser L4 and L6 cylinder engines.
This gasket provides a direct interchange for Mercury part number 1399-99, Sierra 18-2575, and GLM 32190.
- Installs manually between the carburetor bowl and the main body.
- Designed for use with gasoline-fueled marine engines.
- This is a genuine OEM Mercury Marine factory part.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Mercury | 1399-99 |
| Sierra | 18-2575 |
| GLM | 32190 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Mercury/Mercruiser applications, many models are identified by serial number ranges rather than specific production years. Please match your engine's serial number to the ranges listed.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. |
|---|---|---|---|---|---|
| Mercury | 60 | 60 | 1408611-1916138 | 1399-99 | |
| Mercury | 60 | 60 | 1916139-2529894 | 1399-99 | |
| Mercury | 60 | 60 | 2385673-2387383 | 1399-99 | |
| Mercury | 100, 150, 200, 250 | Various | 1290910-1499331 | 1399-99 | |
| Mercury | 110 | 110 | 1470349-1865778 | 1399-99 | |
| Mercury | 200 | 200 | 1558310-1866495 | 1399-99 | |
| Mercury | 200 | 200 | 1866496-2296266 | 1399-99 | |
| Mercury | 300, 350 | 300-350 | 1271884-1448139 | 1399-99 | |
| Mercury | 350 | 350 | 1571114-1812753 | 1399-99 | |
| Mercury | 350 | 350 | 1812754-1960826 | 1399-99 | |
| Mercury | 400 | 400 | 1279685-1476509 | 1399-99 | |
| Mercury | 450 (4 CYL.) | 450 | 4-Stroke | 1476510-1531568 | 1399-99 |
| Mercury | 500 | 500 | 1421113-1639472 | 1399-99 | |
| Mercury | 500 | 500 | 1639473-1755548 | 1399-99 | |
| Mercury | 500 | 500 | 1755549-2097444 | 1399-99 | |
| Mercury | 500 | 500 | 1770179-2116317 | 1399-99 | |
| Mercury | 500 | 500 | 2097445-2305100 | 1399-99 | |
| Mercury | 500 | 500 | 2116318-2305100 | 1399-99 | |
| Mercury | 600 (6 CYL.) | 600 | 1303411-1542744 | 1399-99 | |
| Mercury | 650 (4 CYL.) | 650 | 1542745-1765043 | 1399-99 | |
| Mercury | 650 (4 CYL.) | 650 | 1765044-2119748 | 1399-99 | |
| Mercury | 650 (4 CYL.) | 650 | 2119749-2309310 | 1399-99 | |
| Mercury | 700 (6 CYL.) | 700 | 1296411-1413610 | 1399-99 | |
| Mercury | 700 (6 CYL.) | 700 | 1413611-1566239 | 1399-99 | |
| Mercury | 800 (6 CYL.) | 800 | 1335465-1398629 | 1399-99 | |
| Mercury | 800 (6 CYL.) | 800 | 1398630-1566239 | 1399-99 | |
| Mercury | 850 (6 CYL.) | 850 | 1460999-1766823 | 1399-99 | |
| Mercury | 900 (6 CYL.) | 900 | 1766824-1869775 | 1399-99 | |
| Mercury | 950 (6 CYL.) | 950 | 1869776-2318585 | 1399-99 | |
| Mercury | 1000 | 1000 | 1464949-1768403 | 1399-99 | |
| Mercury | 1000 | 1000 | 1768404-2318585 | 1399-99 | |
| Mercury | 1100 | 1100 | 1870204-2314955 | 1399-99 | |
| Mercury | MARK 5, KF5, KF3 | ALL | 1399-99 | ||
| Mercury | MARK 6, 6A | ALL | 1399-99 | ||
| Mercury | MARK 7, KE4 | ALL | 1399-99 | ||
| Mercury | MARK 10, 10A, 15A, 28, 28A, 28AD | ALL | 1399-99 | ||
| Mercury | MARK 15, 20, KH7, WG7 | ALL | 1399-99 | ||
| Mercury | MARK 25, 25E | ALL | 1399-99 | ||
| Mercury | MARK 30H, 55H | ALL | 1399-99 | ||
| Mercury | MARK 35A | ALL | 1399-99 | ||
| Mercury | MARK 40, KG9, KF9 | ALL | 1399-99 | ||
| Mercury | MARK 50, 50E | ALL | 1399-99 | ||
| Mercury | MARK 55, 55E | ALL | 1399-99 | ||
| Mercury | MARK 55AE, 55AM, 58AE, 58E | ALL | 1399-99 | ||
| Mercury | MARK 75 | ALL | 1399-99 | ||
| Mercury | MARK 75A, 78, 78A | ALL | 1399-99 | ||
| Mercury | KE7, KF7, KG4, KG7 | 1939–1953 | 1399-99 |
Technical Specs
- Product Type
- Carburetor Bowl Gasket
- Installation
- Manual installation between carburetor bowl and body
- Fuel Type
- Gasoline
- Dimensions
- 5.13 in x 4.0 in x 0.13 in
- Weight
- 0.15 lb (0.068 kg)
- Package Quantity
- 1 gasket per package
- Warranty
- Standard Mercury Marine OEM parts warranty
- Other Technical Attributes
- Genuine OEM Mercury Marine factory part
What’s in the Box
- 1 x Carburetor Bowl Gasket (1399-99)
Installation Notes
- Disconnect the battery and ensure the engine is cool. Shut off the fuel supply.
- Carefully remove the carburetor from the engine, disconnecting fuel lines and linkages.
- Place the carburetor on a clean workbench. Remove the screws holding the float bowl to the main body.
- Separate the bowl and discard the old gasket. Thoroughly clean the mating surfaces of both the bowl and the carburetor body.
- Place the new gasket in position and reattach the float bowl, tightening screws in a crisscross pattern to ensure even pressure.
- Reinstall the carburetor onto the engine, reconnecting all lines and linkages.
- Turn the fuel supply back on and check for any leaks around the gasket before starting the engine.
Troubleshooting & FAQ
How do I confirm this gasket fits my specific engine?
Your primary source for compatibility should be the Engine & Model Compatibility table in this listing. Cross-reference your engine's brand, model, and serial number (or year range) with the data provided.
What are the signs of a failing carburetor bowl gasket?
The most common sign is a visible fuel leak around the seam of the carburetor bowl. Other symptoms can include a strong gasoline smell, poor engine idling, stalling, or difficulty starting due to an improper air-fuel mixture.
Do I need to use a sealant with this gasket?
Generally, no. This type of gasket is designed to create a seal under compression without any additional chemical sealants. Using sealant can sometimes interfere with proper sealing or contaminate the carburetor's internal passages.
How often should I replace my carburetor gasket?
It is best practice to replace the carburetor bowl gasket any time the carburetor is disassembled for cleaning or rebuilding. Otherwise, replace it immediately if you notice any signs of leaking or deterioration.
What is the difference between OEM and aftermarket parts?
This listing is an aftermarket replacement (not OEM). It is built to OEM-level specifications with comparable materials. All our parts are manufactured in an ISO 9002 facility and are batch-inspected for consistency and quality.
How fast is shipping and what does it cost?
We ship worldwide quickly—typical transit is 5–15 days. Standard shipping is free to most locations; expedited options will appear at checkout if they are available for your region.
What is the warranty and return policy?
This part is covered by a 1-year warranty against manufacturing defects under normal use. If you encounter any issues, please contact our support team with your order details. Returns are accepted within our standard window for items that are unused and in their 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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