This document is an operation and maintenance manual for Kohler engines.
This service manual covers ENI 632 Class two-cylinder two-stroke engines, models K295-2, K295-2AX, K340-2, K340-2AX, SK340-2AS, K399-2, K399-2AX, K440-2, K440-2AS, K440-2AX, and K618-2. It includes safety precautions, pre-start and starting procedures, stopping procedures, operational recommendations, troubleshooting, and preventive service schedules.
The manual also details fuel and fuel system requirements, ignition and electrical systems, starters, exhaust systems, general engine service, overhaul and repair, reconditioning, reassembly, special tools, and specifications.
| Fuel mixture ratio | 20:1 first fill on new engine; 40:1 thereafter |
|---|---|
| Gasoline octane rating | 92 octane minimum |
| Engine oil | SAE 30 or SAE 40 two-cycle, air-cooled type |
| Spark plug gap | 0.020 in |
Mix leaded Regular or Premium gasoline with at least 92 octane and SAE 30 or SAE 40 two-cycle, air-cooled engine oil at 20:1 for the first fill on a new engine and 40:1 thereafter.
Set the spark plug gap at 0.020 inch.
During the first hour, run for short periods at varying speeds up to 3/4 throttle and avoid low, continuous speeds.
Pull full choke and open the throttle to shut off air and stall the engine.