Propeller SOLAS: 12-1/2 x 13: Evinrude/Johnson 40 - 70 hp 2-stroke

When choosing the right propeller, it's important to consider the maximum RPM of the engine as specified by the manufacturer. As a general rule, 2-stroke engines should have 4500-5500 RPM and 4-stroke engines should have 5000-6000 RPM. A 1-inch difference in pitch can increase or decrease the engine's maximum RPM by approximately 200-300 RPM. The propeller size is indicated as follows 10.3 x 12. The last number 12 represents the pitch. Features: Number of blades: 3 12 1/2 x 13 (12.50 x 13) Compatibility includes: Evinrude and Johnson 40-70 hp 2-stroke models from 1975-1985 Small gearcase 3-3/8" Replaces original numbers: 386909