PowerSmart 21-Inch 170cc Self-Propelled Gas Lawn Mower Instruction Manual

1. Introduction

This manual provides essential information for the safe operation, assembly, maintenance, and troubleshooting of your PowerSmart 21-inch 170cc Self-Propelled Gas Lawn Mower. Please read and understand all instructions before using the product to ensure proper function and user safety.

Figure 1: PowerSmart 21-inch 170cc Self-Propelled Gas Lawn Mower.

2. Safety Information

Always prioritize safety when operating power equipment. Failure to follow safety instructions can result in serious injury or property damage.

General Safety Rules:

• Read the entire manual before operation.
• Wear appropriate personal protective equipment (PPE), including eye protection, hearing protection, and sturdy footwear.
• Keep children and pets away from the operating area.
• Never operate the mower in wet grass or rain.
• Ensure all guards and safety devices are in place and functioning correctly.
• Turn off the engine and disconnect the spark plug wire before performing any maintenance or clearing blockages.
• Handle fuel with care; it is highly flammable.

3. Product Overview

The PowerSmart Model V8721S is a self-propelled gas lawn mower designed for efficient lawn maintenance. It features a powerful engine and versatile cutting options.

Key Features:

• 170cc 4-Cycle OHV Engine: Equipped with a recoil starter and auto choke for easy starting and reliable power.
• Self-Propelled Rear-Wheel Drive: Provides effortless mowing, especially on inclines and larger yards (up to 1/2 acre), with a single speed of 3.5-4.1 km/h.
• 21-inch Cutting Deck: Durable steel deck with a heavy-duty blade for fine cuts and small clippings.
• 2-in-1 Versatility: Offers mulching and bagging options. Includes a 1.4-bushel grass bag.
• Adjustable Cutting Height: A 6-position single-level height adjustment allows for quick changes to cutting depth.

Figure 2: Key components and features of the lawn mower.

Figure 3: The 170cc OHV engine provides reliable power.

Figure 4: The mower offers 2-in-1 versatility for mulching or bagging.

4. Setup

4.1 Unboxing and Handle Assembly

The mower comes fully assembled in the box. No tools are required for initial setup. Simply unfold the handle and tighten the knobs to secure it in the operating position.

4.2 Adding Engine Oil

Locate the oil fill cap on the engine. Carefully add the provided engine oil (or recommended 10W30 oil) to the engine. Do not overfill. Check the oil level using the dipstick.

4.3 Attaching the Grass Bag

To attach the grass collection bag, lift the rear discharge door and slide the bag onto the hooks. Ensure it is securely in place. For mulching, remove the bag and close the rear discharge door.

4.4 Adjusting Cutting Height

The mower features a 6-position single-level height adjustment. Locate the adjustment lever on the side of the mower. Move the lever to select your desired cutting height. Adjust both the front and rear axles for an even cut.

Figure 5: Adjusting the cutting height using the single-level lever.

4.5 Side Discharge Setup

If you prefer side discharge, lift the side discharge door and insert the side discharge chute. Ensure it snaps securely into place.

5. Operating Instructions

5.1 Starting the Engine

1. Ensure the fuel tank is filled with fresh gasoline.
2. Press the primer bulb (if equipped) several times until fuel is visible.
3. Hold the operator presence control bar against the handle.
4. Pull the recoil starter cord firmly until the engine starts. The auto choke will assist with starting.

5.2 Engaging Self-Propel

To engage the self-propel feature, hold the drive control bar against the handle. The mower will begin to move forward. Release the bar to disengage the drive.

Figure 6: The self-propelled feature assists with mowing on varied terrain.

5.3 Mowing Techniques

• Mow in overlapping rows for an even cut.
• Avoid cutting more than one-third of the grass blade length at a time.
• For thick or tall grass, consider raising the cutting height or making multiple passes.

5.4 Storage

For compact storage, the handle can be folded. Loosen the handle knobs and fold the handle forward. This allows for storage in tight spaces or hanging the mower vertically.

Figure 7: The mower's handle can be folded for convenient storage.

5.5 Product Demonstration Video

Video 1: A brief overview of the PowerSmart 21-inch 170cc Self-Propelled Gas Lawn Mower, demonstrating its features and operation.

6. Maintenance

Regular maintenance ensures the longevity and optimal performance of your lawn mower.

6.1 General Cleaning

• Clean the mower deck after each use to prevent grass buildup.
• Wipe down the engine and exterior surfaces.

6.2 Blade Maintenance

Inspect the cutting blade regularly for sharpness and damage. A dull blade can tear grass, leading to an unhealthy lawn. Replace damaged blades immediately.

Figure 8: The heavy-duty blade ensures a fine cutting system.

6.3 Engine Components

Refer to the engine manual for detailed maintenance schedules. Key components for regular inspection and replacement include:

• Spark Plug: Check and replace as needed (Part #30010-Z120110-00A0).
• Air Filter: Clean or replace regularly (Part #17100-Z2P0110-0000).
• Oil: Change engine oil according to the schedule (use 10W30 oil).
• Self-Propelled Belt: Inspect for wear and replace if necessary (Part #302040085).

Figure 9: Essential parts for maintaining your mower's performance.

7. Troubleshooting

This section provides solutions to common issues you might encounter.

Common Issues and Solutions:

• Engine will not start: Check fuel level, spark plug condition, and air filter. Ensure the operator presence control bar is fully engaged.
• Mower cuts unevenly: Inspect the blade for damage or dullness. Verify that the cutting height is set evenly on both sides.
• Excessive vibration: Check for loose parts, bent blade, or debris caught in the cutting deck.
• Self-propel not engaging: Inspect the drive control bar and the self-propelled belt for proper tension and wear.

For more complex issues, consult a certified service technician.

8. Specifications

9. Warranty and Support

PowerSmart products are supported by a network of over 500 certified repair centers in the U.S. Full replacement parts are available through the Illinois headquarters. For any issues or support inquiries, please contact PowerSmart customer service.

Protection plans are also available for purchase:

• 2-Year Protection Plan
• 3-Year Protection Plan
• Complete Protect (monthly plan covering eligible purchases)