O&R Engines

(Formerly Ohlsson and Rice)
Listed below are the various models of the O&R engines and some data regarding them.
Model Governor Bore Stroke Displacement Carburetor Spark
Plug
Diameter		 Spark
Plug
Gap		 
*Spark Plug Data:

      For a model using 10mm spark plug, recommended plug is
      Champion UY-6 or equivalent.

      For a model using 14mm spark plug, recommended plug is
      Champion CJ-8 or equivalent for heavy-duty use and Champion
      CJ14 or equivalent for light use.

**Recommended plug is Champion CJ6 for normal use and CJ4 plug
  for heavy use
(SOURCE: Some of the data are from “Small Engines Service Manual”)
Compact I Air-Vane 1.250 1.032 1.26 Diaphragm Type *10 mm or 14 mm 0.025 or 0.030
Compact II Air-Vane 1.250 1.096 1.34 Diaphragm Type 10 mm or 14 mm 0.025 or 0.030
Compact III Air-Vane 1.250 1.096 1.34 Diaphragm Type 10 mm or 14 mm 0.025 or 0.030
Compact I3A Air-Vane 1.250 1.096 1.34 Diaphragm Type 10 mm or 14 mm 0.025 or 0.030
20A Air-Vane 1.437 1.250 2.0 Walbro HDC **CJ6 or CJ4 0.025