Ariens 911058 Lawn Mower Manual

The Ariens 911058 is a self-propelled walk-behind lawn mower featuring a Briggs & Stratton engine, 21-inch steel cutting deck, 3-in-1 capability (mulch, bag, side discharge), single-lever height adjustment, electric start option, and durable construction for residential lawn care. Below are key sections for safety, features, assembly, operation, maintenance, and troubleshooting.

1. Features at a Glance 2. Assembly Instructions 3. First-Time Operation 4. Specifications 5. Controls and Settings 6. Cutting & Discharge Options 7. Maintenance Schedule 9. Storage Guidelines 10. Safety Information 11. Warranty & Support 12. Troubleshooting

Features at a Glance

Key components: Briggs & Stratton engine, 21-inch steel deck, 3-in-1 system, single-lever height adjustment, self-propelled drive, rear bagger, and electric start (if equipped).

Feature	Description
Engine	Briggs & Stratton, 140cc or 163cc, OHV
Cutting Width	21 inches
Cutting Deck	Steel construction, 3-in-1 capability
Height Adjustment	Single lever, 6 positions (1.5-4 inches)
Drive System	Self-propelled, front-wheel drive
Start System	Recoil start; electric start optional
Fuel Tank	Approximately 1 quart capacity
Bag Capacity	2.5 bushels (standard rear bag)
Wheels	8-inch front, 10-inch rear
Weight	Approximately 75 lbs

Assembly Instructions

Unpack and inspect all parts. Assembly requires basic tools (included).

Attach handle: Secure upper and lower handle sections with provided bolts.
Install wheels: Slide wheels onto axles; secure with retainer clips.
Attach bagger: Connect rear bagger assembly to deck brackets.
Install control cables: Connect drive and blade control cables per diagram.
Add oil and fuel: Fill engine with SAE 30 oil; add fresh unleaded gasoline.

WARNING! Do not attempt to start engine before adding oil. Ensure all fasteners are tight.

First-Time Operation

Before first use, complete pre-operation checks.

Check oil level: Ensure oil is at full mark on dipstick.
Add fuel: Use fresh unleaded gasoline (87 octane minimum).
Inspect blade: Ensure blade is sharp and securely fastened.
Adjust cutting height: Set lever to desired position (start at 3 inches).
Start engine: For electric start, connect battery (if equipped); otherwise use recoil.
Engage blade: Pull blade control lever to handlebar.
Begin mowing: Squeeze drive control to engage self-propelled drive.

CAUTION! Clear mowing area of debris. Wear eye protection and sturdy footwear.

Specifications

Model: Ariens 911058
Engine: Briggs & Stratton, 140cc/163cc OHV
Cutting Width: 21 inches
Cutting Height: 1.5 to 4 inches (6 positions)
Deck Material: Steel
Drive: Self-propelled, front-wheel
Start Type: Recoil; electric start optional
Fuel Capacity: 1 quart
Bag Capacity: 2.5 bushels
Warranty: 3-year limited

Controls and Settings

Handlebar controls: Blade control lever, drive control lever, height adjustment lever.

Blade Control: Must be held against handlebar to keep blade engaged. Release to stop blade.

Drive Control: Squeeze to engage self-propelled drive; release to stop.

Height Adjustment: Single lever adjusts all four wheels simultaneously.

Throttle Control: Located on engine; set to FAST for mowing.

Choke: Use for cold starts; move to OPEN once engine runs.

Cutting & Discharge Options

3-in-1 system: Mulch, bag, or side discharge.

Mulching: Install mulch plug; blade recuts clippings into fine particles.
Bagging: Attach rear bag; clippings collected for disposal.
Side Discharge: Remove mulch plug and bag; clippings discharge to side.

Tip: For best mulching, mow when grass is dry and not too tall. Overlap passes slightly.

Maintenance Schedule

Regular maintenance ensures optimal performance and longevity.

Interval	Task
Before each use	Check oil level; inspect blade; clear deck of debris
Every 25 hours	Change oil; check air filter; inspect spark plug
Every season	Sharpen or replace blade; lubricate wheels and cables
Storage	Drain fuel or add stabilizer; clean thoroughly

WARNING! Always disconnect spark plug wire before performing any maintenance.

Storage Guidelines

Proper storage prevents corrosion and starting issues.

Clean mower thoroughly, especially under deck.
Drain fuel tank or add fuel stabilizer.
Run engine until it stops to clear carburetor.
Change oil if near due interval.
Store in dry, covered area.

CAUTION! Never store mower with fuel in tank indoors or near open flame.

Safety Information

Read and understand all safety instructions before operation.

Wear eye protection, long pants, and sturdy shoes.
Clear mowing area of stones, toys, and other objects.
Do not mow wet grass or on steep slopes.
Never leave mower unattended with engine running.
Keep hands and feet away from moving parts.
Stop engine and disconnect spark plug before unclogging or maintenance.
Keep children and pets away from mowing area.

Warranty & Support

Ariens 911058 comes with a 3-year limited warranty for residential use. Warranty covers defects in materials and workmanship. Normal wear, misuse, or lack of maintenance are not covered. For support, contact Ariens Customer Service at 1-800-678-5443 or visit www.ariens.com. Have model and serial numbers ready (located on deck label).

Troubleshooting

Symptom	Possible Cause	Corrective Action
Engine won't start	No fuel, stale fuel, clogged air filter, spark plug	Add fresh fuel; clean/replace air filter; check spark plug.
Engine runs poorly	Dirty air filter, old fuel, clogged carburetor	Clean air filter; drain old fuel; clean carburetor.
Uneven cut	Dull blade, uneven tire pressure, low cutting height	Sharpen blade; check tire pressure; raise cutting height.
Mower vibrates excessively	Loose blade, bent blade, unbalanced blade	Tighten blade bolt; replace bent blade; balance blade.
Self-propelled drive not working	Drive cable loose, drive belt worn	Adjust drive cable; replace drive belt.
Grass not discharging properly	Wet grass, deck clogged, dull blade	Mow when dry; clean deck; sharpen blade.

Service: For repairs beyond basic maintenance, contact authorized Ariens service center.

Support: 1-800-678-5443; www.ariens.com