Jacobsen

JACOBSEN TWO-CYCLE ENGINES
Listed below are the various models of the Jacobsen engines and some data regarding them.
Model Uses Bore Stroke Displacement Carburetor Spark Plug Type Spark Plug Gap
*Spark Plug: Recommended plug is 14 mm., 3/8″ (Champion AC-M46 or Auto-lite A9X)
(Source: Some of the data are from “Small Engines Service Manual”)
J-100 Rotary Mower 2 1-1/2 4.71 Tillotson MT-52A or MT-77A *J11J or AC-M46 0.035
J-125 Reel Mower 2 1-1/2 4.71 Tillotson-MT58 OR MT-77A J-12J or AC-M46 0.035
J-150 Rotary Mower 2-1/2 1-3/4 6.96 Tillotson MT-4A J-11J or AC-M46 0.035
J-175 Rotary Mower 2 1-1/2 4.71 Tillotson-MT59A J-8J 0.035
J-200 Rotary Mower 2 2 6.28 Tillotson-MT26A or MT-4A J-11J or AC-M46 0.035
J-225 Rotary Mower 2-1/4 2 7.95 Tillotson-MT54A J-8J 0.035
J-321 R Reel Mower 2-1/8 1-3/4 6.21 Walbro LMB or LMG UJ-12 0.035

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