Background
The Craftsman Walk Behind Mower 917.386121 is a gasoline-powered lawn mower with a 4-cycle engine manufactured by the Roper Corporation for Sears. It uses unleaded regular gasoline and has a fuel capacity of 1.5 quarts. The engine has a displacement of 11.5 cubic inches and delivers 4.0 horsepower. Its oil capacity is 20 ounces and uses SAE 30 or SAE 5W-30 oil depending on the temperature. The mower utilizes a Champion J19LM or RJ19LM spark plug with a gap of 0.030 inches. It has specific valve clearance for intake and exhaust and a blade bolt torque of 35-40 ft-lbs.
The mower's features include a 20-inch steel mowing deck and the ability to bag, mulch, or side discharge grass. It has a 7-position height adjustment ranging from 1-1/2 to 4 inches. It is equipped with a folding T-shaped handle for storage and an easy pull recoil start. The mower also comes with a manual choke and throttle control. Its operation involves moving the throttle to the fast position, pressing the primer bulb five times, holding down the operator presence control bar and pulling the recoil starter handle quickly. The mower's height, engine speed and cutting width can be adjusted for different grass conditions. Maintenance routines include changing the engine oil, replacing the air filter, spark plug and oil filter, cleaning the underside of the deck and checking the mower blade for sharpness and balance.
Technical Specifications
- Engine Model: Craftsman 4-cycle engine, model 143.964006
- Displacement: 11.5 cu. in.
- Horsepower: 4.0 HP
- Fuel Capacity: 1.5 quarts unleaded regular gasoline (87 octane minimum)
- Oil Type: SAE 30 (above 32°F); SAE 5W-30 (below 32°F)
- Oil Capacity: 20 oz
- Spark Plug: Champion J19LM or RJ19LM (gap: 0.030 in.)
- Valve Clearance (Intake/Exhaust): 0.008/0.008 in.
- Blade Bolt Torque: 35-40 ft-lbs
- Mowing Deck: 20 inch steel
- Grass Disposal: Rear bagging, mulching or side discharge capabilities
- Height Adjustment: 7-position height adjustment from 1-1/2 to 4 inches
- Handle: Folding T-shaped for storage
- Starting Mechanism: Easy pull recoil start
- Engine Control: Manual choke and throttle control
Warranty
The Craftsman Walk Behind Mower 917.386121 comes with a 2-year limited warranty. This warranty covers any defects in materials and workmanship. However, it's important to note that this does not extend to wear parts or damages resulting from operator abuse. To claim the warranty service, you should contact either Sears or an authorized service center.