Leaf Plate Gasket – Fits MerCruiser/Johnson/Evinrude 9.9-15 HP (Replaces 318924)
Leaf Plate Gasket – Fits MerCruiser/Johnson/Evinrude 9.9-15 HP (Replaces 318924) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
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Leaf Plate Gasket – Fits MerCruiser/Johnson/Evinrude 9.9-15 HP (Rep...
Product Details
This Leaf Plate Gasket – Fits MerCruiser/Johnson/Evinrude 9.9-15 HP (Replaces 318924) provides a reliable seal between the leaf plate and crankcase on select 9.9 HP and 15 HP 2-stroke outboard motors. It is designed for use in various MerCruiser, Johnson, and Evinrude engine models.
This part serves as a direct replacement for OEM part numbers MerCruiser 318924 and REC318924, as well as Johnson/Evinrude/OMC 318924 and 0318924.
- Installation Location: Between the engine leaf plate and crankcase.
- Material: High-density paper/fiber gasket material for a durable seal.
- Package Contents: Includes one gasket for a complete replacement.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| MerCruiser | 318924, REC318924 |
| Johnson / Evinrude / OMC | 318924, 0318924 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Johnson/Evinrude (OMC) engines, please verify your model and year from the list to ensure accurate fitment.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. |
|---|---|---|---|---|---|
| Evinrude | E10RELETM | 9.9 | 2-Stroke | 1993 | 0318924 |
| Evinrude | E10SELETM | 9.9 | 2-Stroke | 1993 | 0318924 |
| Evinrude | E10EEUS | 9.9 | 2-Stroke | 1997 | 0318924 |
| Evinrude | E10RLECC | 9.9 | 2-Stroke | 1998 | 0318924 |
| Evinrude | BE10RLEDD | 9.9 | 2-Stroke | 1996 | 0318924 |
| Evinrude | E15RELETB | 15 | 2-Stroke | 1993 | 0318924 |
| Evinrude | E15EERE | 15 | 2-Stroke | 1994 | 0318924 |
| Evinrude | E15RELERE | 15 | 2-Stroke | 1994 | 0318924 |
| Evinrude | E15ELEOD | 15 | 2-Stroke | 1995 | 0318924 |
| Evinrude | E15EEDS | 15 | 2-Stroke | 1996 | 0318924 |
| Evinrude | E15RLEDS | 15 | 2-Stroke | 1996 | 0318924 |
| Evinrude | BE15ELEDS | 15 | 2-Stroke | 1996 | 0318924 |
| Evinrude | SE15RPW | 15 | 2-Stroke | 1997 | 0318924 |
| Evinrude | E15WREES | 15 | 2-Stroke | 1999 | 0318924 |
| Evinrude | E15WRSIR | 15 | 2-Stroke | 2001 | 0318924 |
Technical Specs
- Product Type
- Leaf Plate to Crankcase Gasket
- Installation
- Between leaf plate and crankcase
- Material
- Paper/Fiber Gasket Material
- Dimensions
- 19.0 cm x 14.0 cm x 0.5 cm (L x W x H)
- Weight
- 0.02 kg (0.04 lbs)
- Thickness
- 2 mm (approximately)
- OEM Part Numbers
- 318924, 0318924, REC318924
- Warranty
- Manufacturer's standard warranty
What’s in the Box
- 1 x Leaf Plate to Crankcase Gasket (318924/0318924/REC318924)
Installation Notes
- Disconnect the battery and ensure the engine is completely cool before starting.
- Relieve any fuel system pressure and disconnect fuel lines as required by your service manual.
- Carefully remove any components that block access to the leaf plate assembly.
- Unbolt and remove the leaf plate, then gently take off the old gasket.
- Thoroughly clean both the crankcase and leaf plate mating surfaces. Ensure they are free of old gasket material, oil, and debris for a proper seal.
- Position the new gasket correctly on the crankcase, ensuring all bolt holes align perfectly.
- Reinstall the leaf plate and tighten its bolts to the manufacturer's specified torque sequence and values. Do not over-tighten.
- Reassemble all previously removed components and reconnect fuel lines and the battery.
- Once assembled, start the engine and carefully check for any fuel or air leaks around the gasket area.
Troubleshooting & FAQ
How do I confirm this gasket fits my engine model?
This part is compatible with specific 9.9 HP and 15 HP models. Please verify your engine's model and year against the compatibility chart above. Cross-referencing your old part number with our Part Number Matrix is the most reliable method to ensure correct fitment.
What are the common symptoms of a bad leaf plate gasket?
A faulty leaf plate gasket can cause a vacuum leak, leading to symptoms like a rough or unstable idle, difficulty starting, reduced engine power, and poor acceleration. You may also notice fuel residue around the intake area.
When should this gasket be replaced?
We recommend replacing this gasket whenever the leaf plate is removed for service or inspection. It should also be replaced immediately if you notice any signs of a leak or engine performance issues related to it.
Do I need to use gasket sealant with this part?
This gasket is typically designed to be installed dry. However, always consult your engine's official service manual for model-specific recommendations, as some applications may require a light tacking agent.
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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