Spark Plugs for Vanguard Engines
This spark plug kit is designed specifically for Prodigy Boats powered by Vanguard engines. Each kit includes two spark plugs and is matched to your engine’s horsepower and configuration to ensure reliable starting, smooth operation, and optimal performance on the water.
What’s Included
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(2) Correctly matched spark plugs
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OEM-spec replacements for Vanguard engines
How to Choose the Right Plug
Select the spark plug based on your motor horsepower and engine configuration. Refer to the chart below to ensure proper fitment.
| Motor HP | Configuration | Recommended Plugs |
|---|---|---|
| 37 | Stock | 491055T / RC12YC |
| 37 | Delta 3 / 3.5 | NGK BKR6E |
| 40 | Stock | 491055T / RC12YC |
| 40 | Delta / Turbo | NGK BKR6E |
| 50 | Stock | NGK BKR6E |
Why It Matters
Using the correct spark plug helps maintain proper ignition timing, improves cold starts, and supports long-term engine reliability. Incorrect plugs can lead to poor performance, misfires, or unnecessary engine wear.
Good to Know
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Spark plugs are the same specifications used in Prodigy maintenance kits
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Always replace plugs as a matched pair
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Compatible with factory and performance configurations listed above
Please allow 1–3 business days for order processing.
