Kong Performance Lightweight Billet Flywheel (+30HP) for Mercury 300R

Kong Performance Billet Lightweight Flywheel for Mercury Racing 300R

Tap into the simplest proven gain in performance for your Mercury Racing 300R with the Kong Performance Billet Lightweight Flywheel – engineered for maximum performance, reliability, and simplicity.

Key Features & Benefits

• Built-In Ignition Timing Advance
  Increase +30 horsepower per engine with our integrated timing advance design. No external modules, no complicated setup—just proven, bolt on performance.

• Significant Weight Savings
  Designed from premium billet material, our flywheel is precision-balanced and significantly lighter than stock:

  • 30% lighter than the OEM 300R Flywheel

• Easy Installation
  A true bolt-on upgrade—no tuning required. Installation takes just 30–40 minutes per engine, using standard tools.

• Zero Tuning Required
  Enjoy instant gains with this simple bolt on modification. Bolt it on and immediately hit the water with added horsepower.

• Durability
  A solid design that is built to last and backed by Kong Performance’s 5 YEAR WARRANTY for complete peace of mind.

• Money Back Guarantee
  100% money back guarantee. If you are not 100% happy with it, remove and send back for a full refund. 

This product is intended for enthusiasts who want maximum performance. Please be aware that installing aftermarket performance parts can affect your engine warranty. The manufacturer may refuse warranty service for issues related to or caused by this upgrade. By purchasing, you acknowledge this possibility and accept full responsibility.

SMG ordering and fitment notes

This Kong Performance catalog item is supplied for the applications described above. Verify the exact vehicle, engine, supercharger, bolt pattern, finish, pulley ratio, and supporting hardware before ordering. Contact SMG before purchase when the combination is unusual or when the product requires machining, calibration, or another Kong component.

Processing and shipping

Processing occurs before shipping. Kong products may be special-order or vendor-fulfilled and can require additional handling time before carrier pickup. Expedited shipping changes transit time after shipment and does not shorten manufacturing, machining, or order processing. Any product-specific lead time or availability note above takes priority.

Installation responsibility

Performance components should be installed and calibrated by a qualified professional. The purchaser is responsible for verifying compatibility, safe operating limits, emissions legality, and suitability for the intended vehicle and use.