Rotary Corp brand aftermarket product. For 7/8" crankshaft. Has 5/32" keyway. Uses 1-3/4" Blade bolt. Used on 3-1/2" & 4 hp engines. Lowers blade 9/16".
For 7/8" crankshaft. Has 5/32" keyway. Uses 1-3/4" Blade bolt. Used on 3-1/2" & 4 hp engines. Lowers blade 9/16". OREGON 80-122 Fits 400-275 405-233 SUNBELT B1SB1182