Jacobsen 2-cycle engines
(Source: Some of the data is from “Small Engines Service Manual”)
Listed below are the various models of the Jacobsen engines and some data regarding them
| Model | Type of Machine Used on | Bore | Stroke | Displacement | Carburetor | Spark Plug Type | Spark Plug Gap |
|---|---|---|---|---|---|---|---|
| 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 |
Spark Plug
* Recommended plug is 14 mm., 3/8″ (Champion, AC-M46 or Auto-lite-A9X)
