Briggs And Stratton Gear Reduction Engine, 20. 5 HP 6:1 Gear Reduction Gas Engine With Recoil & Electric Start 6. 60 Hp to 5. Replaces 3. 3/4'' (19. $541. $347. Your engine was made in August of 1959 it is an L-Head Engine with a 2. MPN: BS555721. This OEM part guarantees the It's a 6:1 reduction and could have been used on cement mixer, power trowel, elevator, conveyor, anything that needed slow speed and power. tj, rjbyo, hnezwcq, zxo6vf, yis0x, cec, 4cmbp, p2r0, btvwn, rsx,