Introduction：
Fine tunes carburetion and timing peak for maximum fuel economy.Easy to read 0-30 inches vacuum and 0-10 pounds of pressure scales with metric scales also shown.Complete with hose and adapters.Designed to check;
·Fuel pump pressure
·Mechanical condition of the engine
·Vacuum control system function
·Leaks in the intake manifold,manifold and head gaskets,piston rings,valves and vacuum lines
·3-1/2"diameter face
Casing size： 260×120×35MM
Weight：         0.25KG