Strait from the Kohler owners manual
Specifications
Model: ................................................................................... K241 ................. K301 ................ K321 ................... K341
Bore: ................................................. inches (millimeters) ... 3.25 (82.6) ...... .3.38 (85.7) ....... 3.50 (88.9). ........ .3.75 (95.3)
Stroke- ................................................ inches (millimeters) ... 2.88 (73.0) ...... .3.25 (82.6) ....... 3.25 (82.6). ........ .3.25 (82.6)
Displacement: .............. cubic inches (cubic centimeters) ... 23.9 (391) ....... .29.1 (476) ........ 31.3 (512). ......... .35.9 (588)
Power (@3600 RPM): ................. horsepower (kilowatts). .. IO (7.5) ............ 12 (9.0) ............ 14 (10.4). ............ 16 (11.9)
Approx. Weight: ...................................... Ibs. (kilograms) ... 118 (53.5) ......... 118 (53.5) ........ 118 (53.5) ........... 122 (55.4)
Oil Capacity: ......................................... U.S. pints (liters) ... 4 (1.9) ............. .4 (1.9) .............. 4 (1.9). ................ 4 (1.9)
Spark Plug Gap:
Magneto Ignition. ............................. inches (millimeters). .. 0.025 (0.65) .... .0.025 (0.65) .... .0.025 (0.65). ...... .0.025 (0.65)
Battery, Breakerless: ...................... inches (millimeters) ... 0.035 (0.90) .... .0.035 (0.90) ..... 0.035 (0.90). ....... 0.035 (0.90)
Gaseous Fueled Engines: .............. inches (millimeters) ... 0.018 (0.45) .... .0.018 (0.45) ..... 0.018 (0.45). ....... 0.018 (0.45)
Spark Plug Size: ............................................. millimeters.. . 14 .................... .14.. ................... 14 ....................... 14
Spark Plug Type: ............................................................. Champion RHIO or equivalent
Breaker Point Gap (Nominal): .......... inches (millimeters) ... 0.020 (0.50) .... .0.020 (0.50) ..... 0.020 (0.50). ....... 0.020 (0.50)