BOLD MAGENTA part numbers are new for 2026 PARTS-UNLIMITED.COM 2026 | TIRE & SERVICE SERVICE & MAINTENANCE TOOLS SERVICE & MAINTENANCE TOOLS 540 DESCRIPTION PART # 2-carb set 3804-0004 DESCRIPTION PART # 4-carb set 3804-0005 CARBURETOR SYNCHRONIZERS •Complete kit with vacuum gauges, hoses, adapters, mounting plate and instructions •Available in 2-carb or 4-carb set LENGTH THREAD PART # 170 mm 5 x 0.80 mm 3804-00391 98 mm 5 x 0.80 mm 3804-00421 53 mm 6 x 0.85 mm 3804-00401 60 mm 6 x 1.0 mm 3804-00412 1 Two-piece set. 2 Four-piece set. CARBURETOR SYNC ADAPTERS •Sold in sets DESCRIPTION PART # Brass M5 threaded adapter (includes fiber washer and neoprene sealing cap) 3804-0012 Brass M6 threaded adapter (includes fiber washer and neoprene sealing cap) 3804-0013 Extended M5 threaded adapter (includes 1 1/2’ of fuel- and oil-resistant hose and sealing cap) 3804-0014 DESCRIPTION PART # Extended M6 threaded adapter (includes 1 1/2’ of fuel- and oil-resistant hose and sealing cap) 3804-0015 M5 Flexi-rigid adapter (includes fiber washer) 3804-0016 M6 Flexi-rigid adapter (includes fiber washer) 3804-0017 Santoprene fuel- and oil-resistant hose, 3’ L 3804-0018 VacuumMate six-cylinder adapter kit 3804-0022 CARBMATE AND VACUUMATE™ WITH ACCESSORIES •Extended vacuum adapter includes 1 1/2’ of Santoprene hose; ideal for permanent mounting on vehicles where access to the carburetor or fuel-injection synchronizing ports requires removal of side panels, air filters or fuel tank DESCRIPTION PART # VacuumMate™ w/ battery 3804-0057 VACUUMMATE™ ALLWEATHER •Industry standard for fast and accurate synchronizing for up to four carburetor/fuel injection throttle valves •Can be used with two- or four-stroke engines • Four LED bars display manifold pressure, even in sunlight •Built-in tachometer displays engine idle speed up to 2000 rpm •Dynamic mode to troubleshoot poor engine synchronizing •Includes a rechargeable 7.2V NiMH battery (can also be powered and recharged by the internal battery) •Includes four M5 and four M6 unique flexi-rigid manifold adapters DESCRIPTION PART # CarbMate 3804-0023 DESCRIPTION PART # 4-cylinder adapter kit 3804-0011 CARBMATE • Electronic, shock resistant and durable solid-state two-channel synchronizer for carburetors and fuel-injection throttle bodies •Convert to synchronize three or four carburetors/throttle bodies with optional 4-cylinder adapter kit (sold separately) •Bright color LED graph display quickly reacts to minor adjustments •Precision instrument is accurate to 0.5 cmHg; meets or exceeds OEM specifications •Displays the difference in vacuum intake settings of two carburetors or throttle bodies on a single 9-LED display •Single green LED at center indicates whether the compared manifold vacuums are equal within the selected resolution •Zero adjustment knob provides easy and quick pre-calibration prior to synchronizing with no tubes connected •Instrument powered by any 12V battery source (cord with clips supplied) •Unique flexi-rigid adapter allows synchronization of machines with difficult-to-reach 5 mm or 6 mm carburetor or fuel-injection vacuum ports •Sold each 3804-0005 3804-0039 3804-0012 3804-0014 3804-0016 3804-0018 3804-0022 3804-0023 3804-0011
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