This document is an owner's manual for the Poulan PRO PR521ES Snow Thrower, a walk-behind snow thrower designed for residential use. The manual provides detailed instructions for assembly, operation, maintenance, and troubleshooting, emphasizing safety precautions throughout.
Function Description:
The Poulan PRO PR521ES is a walk-behind snow thrower designed to clear snow from various surfaces such as driveways, sidewalks, and roads. It features an auger assembly that collects and discharges snow through a chute, which can be adjusted to direct the snow stream. The machine is powered by an engine, with options for both recoil and electric starting. Safety mechanisms are integrated to prevent accidental engagement of the auger blades and to ensure the operator's safety during use.
Important Technical Specifications:
- Model Number: PR521ES (96184000104)
- Gasoline Capacity and Type: 1.6 Quarts (1.5 Liters) of Unleaded Regular gasoline only. The manual explicitly states that gasoline containing up to 10% ethanol (E10) is acceptable, but exceeding 10% ethanol will void the product warranty. E85 blended fuels are not compatible.
- Oil Type (API SG-SL):
- SAE 30 (above 50°F / 10°C)
- SAE 5W-30 or 10W-30 (32° to 50°F / 0° to 10°C)
- SAE 5W-30 (below 32°F / 0°C)
- Multi-viscosity oils (5W30, 10W30) improve cold weather starting but may increase oil consumption above 32°F.
- Oil Capacity: 16 Ounces (0.47 Liters)
- Spark Plug: F6RTC
- Spark Plug Gap: 0.030 inches (0.762 mm)
- Engine: LCT engine (specific model 580810601 for complete engine assembly).
- Drive System: Belt-driven auger blades.
- Starting Options: Recoil start handle and an electric start button (if equipped) for 110-volt A.C. receptacle.
Usage Features:
- Handle Assembly: The handle can be unfolded and secured for operation.
- Discharge Chute and Deflector: The chute and deflector can be adjusted to control the direction and angle of snow discharge. The deflector chute handle moves left or right for direction, and a knob allows adjustment of the deflector angle.
- Engine Starting: A key must be inserted, the choke lever moved to the left position, and the primer bulb pushed 2 times (holding for a second each time) for cold starts. For electric start models, an extension cord is connected to a grounded 110-volt A.C. receptacle.
- Auger Blade Engagement/Disengagement: The auger blades are engaged by holding a control bar against the handle and disengaged by releasing it.
- Stopping the Engine: The engine is stopped by pulling out the ignition key.
- Clearing Clogged Chute: Emphasizes using a clearing tool (at least 15 inches long) and never hands, after shutting off the engine and waiting for auger blades to stop.
- Operating Tips: Recommends clearing snow in the early morning when it's dry, overlapping paths, throwing snow downwind, reducing width for heavy snow, keeping the engine clean, and running the engine for a few minutes after use to melt ice.
- Preventing Freeze-up: Instructions include running the engine for a few minutes after use, cleaning snow/ice from the chute base, rotating the chute, and pulling the recoil starter or using electric start to prevent freezing of components.
Maintenance Features:
The manual provides a comprehensive maintenance schedule with checks to be performed before each use, after each use, every 25 hours or every season, and before storage.
- Fasteners: Check for loose fasteners regularly.
- Snow Thrower Cleaning: Clean the entire unit after each use.
- V-Belts: Inspect and replace V-belts as necessary.
- Auger Blades and Scraper Bar: Check and replace these wear items as needed. The manual notes that during initial break-in, it's normal for auger blades to build up excessive heat if not operated in snow, and warns against operating without snow or water for lubrication.
- Fuel System: Check fuel lines and electrical wires. For storage, it's crucial to prevent gum deposits by emptying the fuel tank and carburetor or using a fuel stabilizer.
- Engine Oil: Check oil level before starting and every five hours of continuous use. Change oil every 25 hours or annually. Instructions for draining and refilling oil are provided, including warnings about hot oil.
- Muffler: Inspect the muffler.
- Spark Plug: Check and replace the spark plug (NGK BPR6ES, Champion RN9YC, or BOSCH WR6DC equivalent) as needed, with specific instructions for setting the gap to 0.030 inches.
- Fuel Tank: Empty the fuel tank before storage.
- Control Cable Adjustment: Instructions for checking and adjusting the control cable to ensure proper auger blade stop and prevent belt slip.
- Storage: Detailed steps for preparing the snow thrower for storage, including fuel system preparation, engine oil change, cylinder lubrication, and general storage recommendations (e.g., storing indoors, covering with a breathable cover).
- Troubleshooting Guide: A table listing common problems, their causes, and corresponding corrections.
The manual strongly emphasizes safety, including warnings about rotating parts, thrown objects, flammable gasoline, hot engine components, and the importance of wearing eye protection. It also highlights that using gasoline exceeding 10% ethanol will void the product warranty.
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