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  • NGH 38CC 4-Stroke Petrol Engine Pro Version GF38-PRO

    Below specs are for previous NGF 38CC engine, for reference only.

    • 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. Connectthe nipples with fueltubing 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.
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