0318358 Head Gasket for Evinrude 80-140hp (1982-93) engines
18-2956 R4
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Sierra 18-2956 Cylinder Head Gasket
Premium Replacement for Johnson/Evinrude Outboards
Maintain peak engine performance and ensure a perfect combustion seal with the Sierra 18-2956 Cylinder Head Gasket. Specifically engineered for Johnson and Evinrude outboard motors ranging from 65 HP to 140 HP, this gasket is a critical component for engine cooling and compression integrity.
Key Features
- ✔ Direct OEM fitment for Johnson/Evinrude
- ✔ Marine-grade, high-temp resistant material
- ✔ Precision cut for superior sealing
- ✔ Backed by Sierra's industry-leading warranty
Technical Specs
| Part Number: | 18-2956 |
| Brand: | Sierra Marine |
| Application: | Cylinder Head Gasket |
| Quantity Required: | 2 per engine (V-models) |
Compatibility / Fitment Guide
| Horsepower Range | Years Supported | Engine Type |
|---|---|---|
| 65 Jet / 80 Jet | 1991-1996 | 2 Required per Engine |
| 85 / 88 / 90 HP | 1979-1995 | V4 Models |
| 100 / 110 / 115 HP | 1973-1995 | Cross-Flow V4 |
| 135 / 140 HP | 1973-1984 | V4 Models |
| 75 HP | 1960-1965 | Early V4 Applications |
OEM Cross Reference
| Johnson/Evinrude / OMC: | 318358, 0318358 |
| Mallory Marine: | 9-63828 |
| GLM: | 33540 |
| Redline: | RL2956 |
Questions & Answers
Is this a genuine original part?
This is a premium quality aftermarket replacement part from Sierra Marine, manufactured to meet or exceed original equipment (OE) standards for fitment and performance.
How do I know if it is compatible?
We recommend checking the SKU/MPN (18-2956 or 318358) against your original part number. If your outboard is a 1973-1998 V4 model (65-140 HP), this is likely the correct gasket.
Does this include one or two gaskets?
This listing is for a single gasket. Please note that for most Johnson/Evinrude V4 engines, two gaskets are required (one for each cylinder head).
Note: 4boats.co.uk recommends verifying your original part number against the references above before purchasing. Correct gasket sealing is essential for preventing engine overheating.
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