Service Manual

Specifications

Item Specification

Make / Designation Kohler Air Cooled, Gasoline Engine

Serial Number Below 220000000 CH 22S Spec. No. 66513

Serial Number Above 220000000 CH 23S Spec. No. 76548

Bore/Stroke

Serial Number Below 220000000 3.03 in. / 2.64 in. (77 mm / 67 mm)

Serial Number Above 220000000 3.15 in. / 2.64 in. (80 mm / 67 mm)

Displacement

Serial Number Below 220000000 38.1 cu. in. (624 cc)

Serial Number Above 220000000 41.1 cu. in. (674 cc)

Crankcase oil capacity 2 U.S. qt. (1.9 L) with filter

Oil API Service Classification SF or SG

Above 0�F (–20�C) SAE 10W–30 or 10W–40

Below 32�F (0�C) SAE 5W–20 or 5W–30

Fuel Unleaded Regular Gasoline

Minimum Octane 87

High idle speed (no load) 3600 + 50 RPM

Low idle speed (no load) 1200 + 100 RPM

Air Cooled Gas Engine (Rev. G)

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orkman 3100