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  • .21XZ-M 3.5CC INBOARD MARINE

    By O. S. Engines |
    Product Number OSMG1621
    $0.00

    y Please allow 5-7 days for free in store pick up or flat rate shipping.
    1/10 Desert Truck Rtr
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    This is the O.S. 21XZ-M 3.5cc Inboard Marine Engine. ****** Because of the competition nature of this engine,****** ******it is NOT covered by the O.S. 2 Year W...*More

    This is the O.S. 21XZ-M 3.5cc Inboard Marine Engine. ****** Because of the competition nature of this engine,****** ******it is NOT covered by the O.S. 2 Year Warranty.****** jxs 05/24/11 ir/jxs*Less

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    Key FeaturesFull Specs Comments/Reviews
    • Designed expressly for 21 class boat racing 21D big bore carburetor allows use of high nitro fuel
    • Bore:0.640 (16.27mm)
    • Crankshaft Size:1/4-28
    • Displacement:.21 cu in (3.5cc)
    • Distance between mounting hole centers same side:0.83 (21mm)
    • Distance/mounting tab to center of cooling inlet:2.2 (55.6mm)
    • Distance/mounting tab to center of exhaust:1.1 (28.5mm)
    • Length from backplate to end of crankshaft:3.4 (86.5mm)
    • Length from backplate to front bearing:2.5 (64.5mm)
    • Length from crankcase center to front bearing:1.7 (44mm)
    • Mixture Control Valve:Turn clockwise 10¦ to lean mixture or
    • Power Output:2.75 PS, 2.71 HP @ 33, 000RPM
    • Practical RPM:4, 000 - 45, 000
    • Stroke:0.661 (16.8mm)
    • Width including mounting flanges:1.8 (45mm)
    • Width not including mounting flanges:1.2 (31.6mm)
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