Background

The Makita DPC7300 is a concrete cutter, primarily designed for heavy-duty construction use. It is equipped with an engine that has a displacement of 73 cu in (4.5 cm3), and a maximum power output of 5.6 hp (4.2 kW) at 9350 rpm. The engine's maximum torque is rated at 5.0 Nm at 3800 rpm and it operates at a clutch engagement speed of 3800 rpm. It also features a maximum spindle speed of 4300 rpm. The engine employs a TILLOTSON HS-273 A diaphragm carburetor and an electronic ignition system with a speed limiter.

The DPC7300 is designed to be fuel-efficient, with a specific consumption at max. load as per ISO 8893 of 500 g/kWh. It has a fuel tank capacity of 1.1 L and uses a fuel mixture ratio (fuel/two-stroke oil) of 50:1 when using MAKITA oil or 100:1 when using MAKITA HP 100 oil. The cutter employs a five-stage air filter system for reliable operation, even in dusty conditions. The cutting head can be mounted in a central or side position, and the device supports a wide range of cutting discs, including diamond cutting discs.

Despite its complex features, the Makita DPC7300 has been designed with considerations for repairability and longevity. The device includes a troubleshooting section in its manual that covers a range of issues such as problems with the cutting disc, starting difficulties, and insufficient power. Additionally, the manual also provides detailed maintenance instructions to ensure the device's durability and optimal performance.

Technical Specifications

  • Displacement: 73 cu in (4.5 cm3)
  • Bore: 1.97 in (50 mm)
  • Stroke: 1.46 in (37 mm)
  • Max. power: 5.6 hp (4.2 kW) at 9350 rpm
  • Max. torque: 5.0 Nm at 3800 rpm
  • Idling speed: 2500 rpm
  • Clutch engagement speed: 3800 rpm
  • Max. spindle speed: 4300 rpm
  • Sound pressure level at operator's ear: 104 dB(A)
  • Vibration acceleration ah,w as per EN 1454: 7/6 m/s2 (idle/rated spindle speed)
  • Carburetor: TILLOTSON HS-273 A diaphragm carburetor
  • Ignition system: electronic with speed limiter
  • Spark plug: NGK BPMR 7A, BOSCH WSR 6F or CHAMPION RCJ 6Y
  • Fuel consumption at max. load as per ISO 8893: 2.1 kg/h
  • Specific consumption at max. load as per ISO 8893: 500 g/kWh
  • Fuel tank capacity: 1.1 L
  • Mixture ratio (fuel/two-stroke oil): 50:1 (when using MAKITA oil) or 100:1 (when using MAKITA HP 100 oil)