Tanaka 47
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The Tanaka 47 is a 47cc 2 stroke engine.

Specifications1

  • Piston Rings: 2
  • Displacement: 47cc
  • Bore X Stroke: 43mm x 32mm
  • Compression Ratio: 7.1 : 1
  • Horsepower: 2.4hp
  • Torque Ft. Lbs.: 1.9 @ 5000 rpm
  • Idling RPM: 2700+/- 250
  • Rotation (Recoil Side): Clockwise
  • Clutch Diameter: 78mm
  • Ignition System: TCI
  • Engine Dimensions LxWxH: 187mm x 257mm x 271mm
  • Engine Weight: 9.0lbs
  • EPA Compliant: yes
  • C.A.R.B. Tier II Compliant: no
  • Recommended Fuel Mix: 50:1

Availability

The engine

This engine can be bought through various power tool suppliers as well as from the factory itself. Prices seem to fluctuate between $250 and $350 depending on where you look.

Parts / Service

Since Tanaka is a power equipment manufacturer, engines and parts are easy to come by and will likely stay like that.

Reliability

If there is anything this engine is known for, it is its reliability. Tanaka's engines are known to grow stronger/faster over the years and this engine is no exception

Performance Issues

This engine had minor performance problems related to its limited carburetor. On long, sustained strain, the engine would often bog slightly. This is one of the few performance concerns that were addressed with the introduction of the 47r.

Performance Enhancements

Tuned Pipes

Tanaka 3 Piece Pipe

Tanaka designed a pipe specifically for its 47cc engines to be mounted on Bladez's and its own scooters.

Bladez 3 Stage Pipe

Bladez also designed this pipe to me mounted on its scooters along with this engine and the Tanaka Purefire 40.

Porting

Head Kit

There are no head kits in production that are compatible with this engine.

Timing Key

There are timing keys available to advance this engine's timing for a few more RPMs, but the effects these have on this engine have shown to be negligible.

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