Avia M 337

The Avia M 337 (originally designated the Walter M337) is an inverted six-cylinder air-cooled inline engine. It was developed by the Czechoslovak company as a six-cylinder derivative of the four-cylinder M 332 engine, going into production in 1960. An unsupercharged version of the M 337 is designated as the LOM M137. Production transferred to Avia in 1964, and to Letecke Opravny Malesice (LOM) in 1992.

Variants

 * M 337A: Basic supercharged engine - not rated for aerobatics
 * M 337R: Modified for pusher installation
 * M 337AK: modified oil system for unlimited inverted flying. "Snap" aerobatics permitted.
 * M 337AK1:AK fitted with alternator instead of generator
 * M 337B:Increased max running speed (3000 rpm) - increased power - 235 hp.
 * M 337BK:Aerobatic version of B.
 * M 337C:Increased compression ratio - 252 hp
 * M 137A: Unsupercharged version of M 337 180 hp take-off power. Aerobatics allowed.
 * M 137AZ:As M 137A, with filtered air feed
 * M 437: Gear ratio 0.7:1 240 hp

Applications

 * AeroVolga LA-8C
 * Falconar SAL Mustang
 * Let L-200 Morava
 * Zlín Z 526, Z 726
 * Zlín 142
 * Zlín Z 43