Ariens 911059 Lawn Mower Manual

The Ariens 911059 is a high-performance walk-behind lawn mower featuring a powerful engine, multiple cutting heights, durable steel deck, easy-start system, mulching and bagging capabilities, ergonomic handle with controls, and safety features like blade brake clutch. Designed for residential lawns, it offers reliable cutting performance and user-friendly operation. Below are key sections for safety, features, assembly, operation, maintenance, and troubleshooting.

1. Features at a Glance 2. Assembly Instructions 3. First-Time Setup 4. Specifications 5. Controls and Settings 6. Operating the Mower 7. Maintenance Schedule 8. Storage Guidelines 9. Safety Information 10. Warranty & Support 11. Troubleshooting

Features at a Glance

Key components: Steel cutting deck, Briggs & Stratton engine, height adjustment lever, rear bagger, mulching plug, ergonomic handle with controls, and safety key.

FeatureDescription
Cutting Deck21-inch steel deck for durable cutting performance
EngineBriggs & Stratton 140cc engine with easy-start system
Cutting Height6-position adjustment (1.5" to 4")
Drive SystemSelf-propelled rear-wheel drive with speed control
Mulching CapabilityIncludes mulching plug for nutrient recycling
BaggerRear-mounted grass collection bag (2.5 bushel capacity)
HandleAdjustable ergonomic handle with fold-down storage
Blade Brake ClutchSafety feature that stops blade while engine runs
Wheels8-inch rear wheels, 7-inch front wheels for maneuverability
Fuel Tank1-quart capacity for extended operation

Assembly Instructions

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

  1. Attach handle: Secure upper and lower handle sections with provided bolts.
  2. Install wheels: Attach front and rear wheels to axles; secure with retaining clips.
  3. Mount bagger: Attach bagger frame to rear deck; install collection bag.
  4. Install mulching plug: Insert plug into rear discharge opening if mulching.
  5. Add engine oil: Fill with SAE 30 detergent oil (check dipstick).
  6. Add fuel: Use fresh unleaded gasoline (87 octane minimum).

WARNING! Wear gloves during assembly. Ensure all bolts are tightened securely.

First-Time Setup

Complete assembly, then prepare for first use.

  1. Check oil level: Ensure oil is at full mark on dipstick.
  2. Add fuel: Fill tank with fresh gasoline; avoid overfilling.
  3. Adjust cutting height: Set lever to desired position (middle setting recommended).
  4. Test controls: Verify throttle, drive control, and blade engagement work smoothly.
  5. Start engine: Insert safety key, set choke, pull starter cord.

CAUTION! Operate outdoors only. Keep area clear of bystanders during initial test.

Specifications

Controls and Settings

Handle-mounted controls for easy operation.

Handle Controls: Drive control lever (squeeze to engage), Throttle control, Blade engagement lever, Height adjustment lever, Safety key slot.

Cutting Height: Adjust via lever at each wheel (positions 1-6). Drive Speed: Controlled by lever pressure; variable speed. Throttle: Set to FAST for cutting, SLOW for idling. Blade Engagement: Pull lever against handle to engage blade. Safety Key: Must be inserted for engine operation.

Operating the Mower

For optimal cutting performance and safety.

  1. Pre-operation check: Inspect area for debris; check oil and fuel levels.
  2. Starting: Insert key, set choke, pull starter firmly.
  3. Engaging blade: With engine running, pull blade engagement lever.
  4. Engaging drive: Squeeze drive control lever to move forward.
  5. Cutting patterns: Overlap each pass by 2-3 inches for even cut.
  6. Emptying bagger: Stop engine, remove bag, and dispose of clippings.
  7. Shutting down: Release blade lever, set throttle to STOP, remove key.

Tip: Mow when grass is dry for best results. Avoid cutting too short.

Maintenance Schedule

Regular maintenance ensures longevity and performance.

IntervalTask
Before each useCheck oil level; inspect blade for damage; clear deck of debris
Every 25 hoursChange engine oil; check air filter; inspect spark plug
Every 50 hoursReplace air filter; sharpen or replace blade; check drive belt
Season endDrain fuel or add stabilizer; clean underside of deck; lubricate wheels
StorageStore in dry location; cover mower; remove battery (if equipped)

WARNING! Disconnect spark plug before performing any maintenance.

Storage Guidelines

Proper storage prevents damage and ensures easy start next season.

  1. Clean mower thoroughly, especially underside of deck.
  2. Drain fuel or add fuel stabilizer to prevent gumming.
  3. Change oil if near service interval.
  4. Remove spark plug and add teaspoon of oil to cylinder; pull starter slowly.
  5. Store in dry, covered area; keep handle folded if space is limited.

CAUTION! Never store with fuel in tank in enclosed spaces due to fire risk.

Safety Information

Always follow safety precautions to prevent injury.

DANGER! Keep hands and feet away from rotating blade. Never lift mower while engine is running.

Warranty & Support

Ariens 911059 includes a 2-year limited warranty covering defects in materials and workmanship. Warranty does not cover normal wear, misuse, or lack of maintenance. For support, contact Ariens Customer Service at 1-920-756-2141 or visit www.ariens.com. Keep original receipt for warranty claims.

Troubleshooting

SymptomPossible CauseCorrective Action
Engine won't startNo fuel, old gas, clogged filterAdd fresh fuel; check fuel line; clean or replace air filter.
Poor cutting performanceDull blade, low engine speedSharpen or replace blade; set throttle to FAST.
Mower vibrates excessivelyUnbalanced blade, loose partsStop engine, check blade balance; tighten all bolts.
Self-propel not workingDrive belt loose or wornInspect drive belt; adjust tension or replace if worn.
Grass clumps under deckWet grass, deck cloggedMow when dry; clean deck after use.

Reset: For engine issues, check spark plug gap (0.030") and clean or replace.

Service: 1-920-756-2141; www.ariens.com

Ariens 911059 Lawn Mower Manual © - All Rights Reserved 2025