Over time, every gasoline engine accumulates stubborn deposits that degrade its performance and reduce power. Quicksilver Power Tune offers a professional solution for internal engine cleaning by breaking down and burning away these build-ups, restoring your engine’s responsiveness. Developed by Mercury for maintaining marine engines, it is equally effective on automotive and other engines. With periodic use – for example, once a year or whenever you notice a drop in performance – this spray can help keep your engine running “like new.”
- Easy to Use: Warm the engine to operating temperature, remove the air filter, and spray Power Tune slowly into the intake while the engine is held at a fast idle (2000–3000 RPM). The cleaner rapidly reaches the cylinders and begins dissolving carbon deposits. (If the engine stalls, simply restart it and continue spraying.)
- Improved Performance: After treatment with Power Tune, the engine will idle more smoothly, start more easily, and regain lost power. Many users report crisper throttle response and reduced exhaust smoke once the deposits are cleared out.
- Ideal Before Storage: Use Power Tune as part of your winterization routine. First, clean the engine internals with this spray to remove built-up carbon and gums, then follow up with a fogging oil (e.g., Quicksilver Storage Seal) to protect the engine. This way, your engine will enter storage clean and come out protected for the next season.
- Wide Application: Although designed for boat motors, Power Tune is suitable for other gasoline engines too: snowmobiles, lawn mowers, ATVs, high-mileage car engines, and more. One 12 oz (340 ml) can is typically enough to treat a multi-cylinder engine fully.
- Complete Care: For maximum effect, combine Power Tune cleaning with a proper oil and filter change. Removing deposits with this spray, along with fresh oil, ensures optimal compression, better fuel economy, and a longer engine lifespan.



