Overview Simple but precise synchronisation by direct comparison of a set of carbs orthrottle valves. The compact design and solid state electronics make the CarbMate very durable& resistant against nasty shocks & knocks. CarbMate displays the difference invacuum intake settings of two linked carburettors very precisely on a singletransverse "East-West" 9 LED display.Visual estimation errors, common to thetraditional approach which is to visually compare the individual values onseparate columns of mercury or dial gauges, are eliminated, as two pressures arecompared and one value is displayed. A ZERO adjustment knob provides easy &quick pre-calibration prior to synchronizing. Without any tubes connected,adjust the knob until the centre LED is on. The optional adaptor is designed specifically for use with Rotax engines forhooking your CarbMate to a 2 stroke Rotax Aircraft Engine. The 2 x hoses are both 6 feet long. The connection points to each carburetor are easily made at the crossovertube between the two intake manifolds (separating the carbs duringsynchronization). When one side of the crossover tube is removed, you are left with a maleelbow and a female hose. The inside diameter of the hose is 11mm or 7/16? This way, one carb is hookedto the CarbMate at the elbow on the intake manifold, and the other carb ishooked up at the hose on the compensating tube which is hooked to the otherintake manifold.KIT INCLUDES: CarbMate with Rotax adapter, nylon case & rubber holster.