Get Your Cylinders Working in Harmony.

On marine engines with multiple carburetors (whether it's a dual-carb inboard or a rack of carburetors on an outboard), the mechanical linkage between them is critical. If one carburetor opens slightly before the others, or if the idle mixtures are unbalanced, your cylinders end up "fighting" each other.

The result? Rough idling, excessive vibration, stalling when shifting into gear, and poor fuel economy. Our synchronization service ensures every carburetor draws the exact same amount of air at the exact same time.

The Synchronization Process

We don't tune by "ear"—we tune by physics. Using professional-grade tools, we dial in your engine to factory specifications.

• Vacuum Gauge Analysis: We connect a manometer (multi-channel vacuum gauge) to each intake runner. This visualizes exactly how hard each cylinder is pulling.
• Linkage Adjustment: We meticulously adjust the throttle linkages and cam followers to ensure all butterfly valves open in perfect unison.
• Idle Mixture Tuning: We adjust the air/fuel mixture screws on each carburetor individually to achieve the highest stable vacuum and smoothest idle.
• Load Testing: We verify the settings under load to ensure no hesitation or "bogging" during acceleration.

Signs Your Carbs Are Out of Sync

• Vibration: The engine shakes excessively at low RPMs.
• Stalling: The engine dies when you shift from Neutral to Forward/Reverse.
• Hesitation: There is a delay or stumble when you hit the throttle.
• Uneven Plugs: Some spark plugs look black (rich) while others look white (lean).

Why Choose Breeze Marine for Tuning?

• Old School Knowledge: We understand the nuances of vintage 2-strokes and classic V8s that modern "laptop mechanics" often miss.
• Precision Tools: We use industry-standard mercury or digital vacuum synchronizers for absolute accuracy.
• Comprehensive Check: We always check ignition timing and compression before tuning, because you can't tune a mechanical problem.

Smooth Out Your Ride

Experience the difference a perfectly tuned engine makes. Call us to schedule your synchronization service.