NGH 38CC 4-Stroke Petrol Engine New Version

• Displacement: 37.97cc

  • Bore*Stroke (mm): 39*31.8
  • Compression ratio: 9
  • Carburetor: Walbro custom WT1022
  • RPM range: 1800-8000rpm
  • Spark plug type: CM-6
  • Break in fuel oil ratio: 25:1
  • General use fuel oil ratio: 35:1
  • Recommended propellers: 18*10, 19*8, 19*10, 20*8
  • Weight: 1310g

  Carburetor:

  • 1. This engine uses a Walbro custom WT1022 with a remade arm.
  • 2. Same adjustments as usual.

  Lubricating:

  • 1. There are two nipples on Intakemanifold.One pressurizesto carburetorfrom
  • crankcase, and one isforlubrication fromcarburetorto crankcase.
  • 2. There are two nipples on rear cover.
  • 3. Connect the nipples with fuel tubing separately.
  • Break?in procedure:
  • This engine still uses a high precision sleeve liner,so a lengthy break in period is
  • not necessary, howeveritis beneficialto follow the bench break in process below: 1. AllNGHengines are tested before shipment, lubricated, and packed well.
  • 2. For break in use 2 cycle oil at a ratio of 25:1, and general use with 35:1.
  • 3. Break in RPM is 3000RPM.
  • 4. Break in time is 30minutes.
  • 5. Break in is best performed without a using amuffler, howeverif noise is an issue
  • you can use the stockmuffler.

  Very important:

  • 1. Must connectlubricating nipples with fueltubing between rear cover and intake
  • manifold. Insufficientlubricating will damage the engine.
  • 2. Must use 2 cycle oilforlubricating, do not use 4 cycle oil.
  • 3. Valve gap is at 0.03 to 0.08mm.