Cylinder Head Gasket – Fits Johnson/Evinrude 55-75 HP (Replaces 0313413, 878846)
Cylinder Head Gasket – Fits Johnson/Evinrude 55-75 HP (Replaces 0313413, 878846) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Cylinder Head Gasket – Fits Johnson/Evinrude 55-75 HP (Replaces 031...
Product Details
This aftermarket Cylinder Head Gasket is engineered for Johnson/Evinrude 3-cylinder “Loopcharged” outboard engines, including 55–65 HP models from 1968–1973 and 60–75 HP models from 1974–1989. It also fits specific Mercury/Mariner models that cross-reference to the listed part numbers.
It serves as a direct replacement for Evinrude/OMC parts 0313413, 0324482, and 0777401, along with multiple aftermarket equivalents from GLM, EMP, and Sierra.
- Engineered for direct replacement installation.
- Constructed from durable composite materials suitable for marine environments.
- Designed specifically for outboard engine applications.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Notes |
|---|---|---|
| Evinrude/OMC | 0313413 | Primary OEM Number |
| Evinrude/OMC | 0324482 | Superseded By 0313413 |
| Evinrude/OMC | 0777401 | Superseded By 0313413 |
| Mercury/Mariner | 802249 | Direct cross-reference |
| Mercury/Mariner | 878846 | Direct cross-reference |
| GLM | 33400 | Aftermarket Equivalent |
| EMP | 27-00958 | Aftermarket Equivalent |
| Red Rhino | JE-508 | Aftermarket Equivalent (noted as small bore) |
| Sierra | 18-2960 | Aftermarket Equivalent |
| Mallory Marine | 9-63827 | Aftermarket Equivalent |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Johnson/Evinrude applications, this gasket fits various 3-cylinder "Loopcharged" models made between 1968 and 1989.
For Mercury/Mariner applications, compatibility is confirmed by direct part number cross-reference for parts 802249 and 878846.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Johnson/Evinrude | 3-cylinder "Loopcharged" | 55 | 2-Stroke | 1968–1973 | 0313413 | Small bore |
| Johnson/Evinrude | 3-cylinder "Loopcharged" | 60 | 2-Stroke | 1968–1973 | 0313413 | Small bore |
| Johnson/Evinrude | 3-cylinder "Loopcharged" | 65 | 2-Stroke | 1968–1973 | 0313413 | Small bore |
| Johnson/Evinrude | 3-cylinder "Loopcharged" (913cc) | 60 | 2-Stroke | 1974–1985 | 0313413 | Small bore |
| Johnson/Evinrude | 3-cylinder "Loopcharged" (814cc) | 60 | 2-Stroke | 1986–1989 | 0313413 | Small bore |
| Johnson/Evinrude | 3-cylinder "Loopcharged" (814cc) | 75 | 2-Stroke | 1975–1989 | 0313413 | Small bore |
Technical Specs
- Product Type
- Cylinder Head Gasket
- Installation
- Direct replacement
- Material
- Composite
- Engine Type
- Outboard
- Weight
- 0.21 kg (0.46 lb)
- Dimensions
- 16.0" H x 6.0" W x 1.06" L
- Piston Diameter
- 3.000 inches (76.2 mm)
- Warranty
- Standard manufacturer warranty
What’s in the Box
- 1 x Cylinder Head Gasket (Replaces 0313413/0324482/0777401)
Installation Notes
- Disconnect the battery and drain the engine's cooling system completely.
- Carefully remove the cylinder head cover and any interfering components.
- Unscrew the cylinder head bolts in the reverse order of the manufacturer's specified torque sequence.
- Remove the old head gasket and thoroughly clean both the cylinder head and engine block surfaces of any residue.
- Position the new gasket correctly on the engine block, ensuring all ports and bolt holes align.
- Carefully place the cylinder head back onto the block.
- Tighten the head bolts in stages, following the manufacturer’s recommended torque sequence and specifications.
- Reassemble all other components, refill the cooling system, and reconnect the battery before starting the engine.
Troubleshooting & FAQ
How do I know if my head gasket is failing?
Common signs include engine overheating, loss of compression, milky-white oil (indicating coolant mixing with oil), white exhaust smoke, or bubbling in the coolant reservoir. A compression test is often the best diagnostic step.
Is this gasket specifically for small bore engines?
Yes, this gasket is designed for the small bore 3.000-inch piston diameter found on the specified Johnson/Evinrude "Loopcharged" models. Always verify your engine's specifications before ordering.
Can I reuse my old head gasket?
No. Cylinder head gaskets are single-use "crush" type gaskets. They are designed to deform under pressure to create a perfect seal. Once removed, they cannot be safely reused and must be replaced.
How often should I replace this gasket?
Cylinder head gaskets are not a routine maintenance item. They are typically replaced only when the cylinder head is removed for service or if the original gasket has failed.
Will this fit my Mercury engine?
This part is compatible with Mercury/Mariner models that use part numbers 802249 or 878846. It is critical to confirm the part number for your specific Mercury model, as fitment is not guaranteed for all Mercury 3-cylinder engines.
What's the difference between this and an OEM gasket?
This is an aftermarket part, not an OEM component. It is engineered to meet or exceed OEM specifications for fit, form, and function using comparable materials. Our parts are manufactured in an ISO 9002 certified facility and are batch-inspected to ensure quality and performance.
What are the shipping speed and cost?
We ship worldwide quickly—typical transit is 5–15 days. Standard shipping is free to most regions, with expedited options available at checkout where applicable.
What is the warranty and return policy?
This product is covered by a 1-year warranty against manufacturing defects under normal use. If you encounter an issue, 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 contact us for instructions.
Safety & Important Info
- Verify images and specifications against 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 quality control.
Payment & Security
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