The Ariens 915265 is a 21-inch self-propelled walk-behind lawn mower featuring a 159cc Briggs & Stratton engine, 3-in-1 cutting system (mulch/bag/side discharge), 6-speed drive system, single-lever height adjustment (1.5-4 inches), durable steel deck, easy-start technology, and a 2.5-bushel grass bag. Below are key sections for safety, features, assembly, operation, maintenance, and troubleshooting.
Key components: 159cc Briggs & Stratton engine, 21-inch steel cutting deck, 3-in-1 cutting system, 6-speed drive system, single-lever height adjustment, 2.5-bushel grass bag, and easy-start technology.
| Feature | Description |
|---|---|
| Engine | 159cc Briggs & Stratton 675 Series engine |
| Cutting Width | 21-inch steel deck |
| Cutting System | 3-in-1 (mulch, bag, side discharge) |
| Drive System | 6-speed self-propelled transmission |
| Height Adjustment | Single-lever (1.5 to 4 inches) |
| Grass Bag | 2.5-bushel capacity |
| Starting System | Easy-start technology |
| Wheels | 8-inch rear, 7-inch front |
| Handle | Foldable for storage |
| Fuel Tank | 0.95-quart capacity |
Unpack and inspect all parts. Assembly requires basic tools (included).
WARNING! Always wear gloves during assembly. Ensure all bolts are tightened securely.
Complete assembly, then prepare for first use.
CAUTION! Never add fuel while engine is hot. Allow engine to cool for 5 minutes.
Main controls located on handle: Drive control, throttle, starter cord, height adjustment lever.
Starting Procedure: 1. Check oil and fuel. 2. Set throttle to FAST. 3. Pull starter cord firmly. 4. Allow engine to warm up 30 seconds.
Drive Control: Squeeze lever to engage self-propelled drive; release to stop. Adjust speed with 6-speed selector.
Height Adjustment: Move single lever to one of 6 positions (1.5-4 inches).
Stopping: Release drive control, move throttle to STOP, wait for blades to stop completely.
Configure for mulching, bagging, or side discharge.
Tip: For best results, mow when grass is dry. Overlap passes by 2-3 inches.
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 engine oil, clean air filter, check spark plug |
| Every 50 hours | Replace air filter, sharpen blade, check drive belt |
| Every 100 hours | Replace spark plug, clean fuel system, check wheels |
| Season end | Drain fuel, change oil, clean thoroughly before storage |
Blade Sharpening: Remove spark plug wire. Remove blade, sharpen at 30-degree angle, balance before reinstalling.
Proper storage prevents fuel system issues and corrosion.
CAUTION! Never store with fuel in tank untreated. Fuel deteriorates over time.
Always follow these safety precautions when operating.
DANGER! Rotating blade can cause serious injury. Always ensure blade has stopped before crossing gravel drives or roads.
Ariens 915265 comes with a 3-year limited warranty for residential use. Warranty covers defects in materials and workmanship. Not covered: normal wear, improper maintenance, commercial use, or damage from accidents. Keep original receipt for warranty claims. For warranty service, contact authorized Ariens dealer or call 1-800-678-5443. Register product at www.ariens.com within 30 days of purchase.
| Symptom | Possible Cause | Corrective Action |
|---|---|---|
| Engine won't start | No fuel, old fuel, spark plug | Add fresh fuel, check spark plug, ensure throttle on FAST |
| Engine runs poorly | Dirty air filter, old fuel | Clean/replace air filter, drain old fuel |
| Uneven cutting | Dull blade, uneven tire pressure | Sharpen blade, check tire pressure (12-15 PSI) |
| Self-propelled not working | Drive cable, belt, transmission | Adjust drive cable, check belt, test transmission |
| Excessive vibration | Loose blade, bent blade | Tighten blade bolts, replace bent blade |
| Grass not discharging | Wet grass, clogged deck | Wait for grass to dry, clean under deck |
Service: For technical support, contact Ariens at 1-800-678-5443 or visit www.ariens.com.