Introduction
This manual provides essential information for the safe and efficient operation, maintenance, and troubleshooting of your Ariens APEX 52 inch Zero Turn Mower, model 991159. Please read this manual thoroughly before operating the mower to ensure proper use and to prevent injury or damage.
Image: Ariens APEX 52 inch Zero Turn Mower. This image displays the overall design of the mower, highlighting its robust construction and zero-turn capabilities.
Safety Precautions
Always prioritize safety when operating the mower. Failure to follow safety instructions can result in serious injury or death.
- Read and understand all instructions in this manual before operation.
- Keep all guards and safety devices in place and in working order.
- Never allow children or untrained individuals to operate the mower.
- Clear the mowing area of debris, rocks, and other objects that could be thrown by the blades.
- Wear appropriate personal protective equipment, including eye protection, hearing protection, and sturdy footwear.
- Do not carry passengers on the mower.
- Operate the mower only in daylight or good artificial light.
- Avoid operating on steep slopes or wet grass, which can cause loss of control.
- Turn off the engine and remove the key before performing any maintenance or clearing obstructions.
Setup
Before initial operation, ensure the mower is properly assembled and prepared.
1. Uncrating and Inspection
- Carefully remove the mower from its packaging.
- Inspect all components for any signs of shipping damage. Contact your dealer immediately if damage is found.
- Ensure all fasteners are tight.
2. Fluid Checks
- Engine Oil: Check the engine oil level using the dipstick. Add recommended oil if necessary.
- Fuel: Fill the fuel tank with fresh, unleaded gasoline. Do not overfill.
3. Battery Connection
- Connect the battery terminals, ensuring proper polarity (positive to positive, negative to negative).
- Secure the battery in its tray.
4. Deck Leveling
- Refer to the detailed instructions in the full owner's manual for precise deck leveling procedures. Proper deck leveling ensures an even cut.
Operating Instructions
Familiarize yourself with the controls and operating procedures before starting the mower.
1. Starting the Engine
- Ensure the fuel valve is open.
- Place the throttle lever in the CHOKE position (for cold starts) or FAST position (for warm starts).
- Ensure the parking brake is engaged.
- Ensure the PTO (Power Take-Off) switch for the blades is disengaged.
- Insert the ignition key and turn it to the START position. Release the key once the engine starts.
- Gradually move the choke lever to the RUN position as the engine warms up.
2. Engaging the Blades
- With the engine running at a moderate speed, ensure you are in a safe, clear area.
- Engage the PTO switch to activate the cutting blades.
- To disengage, simply turn off the PTO switch.
3. Driving the Mower
- Release the parking brake.
- Use the control levers to steer and control speed. Pushing both levers forward moves the mower forward; pulling them back moves it backward.
- To turn, push one lever further forward than the other, or pull one back while pushing the other forward for a zero-radius turn.
- Practice driving in an open area before mowing.
4. Adjusting Cutting Height
- The cutting deck features 15 positions for height adjustment.
- Use the deck lift pedal and height adjustment pin to select the desired cutting height, up to 5.5 inches.
- Adjust the height before engaging the blades.
Maintenance
Regular maintenance is crucial for the longevity and performance of your Ariens APEX mower.
1. Routine Checks (Before Each Use)
- Check engine oil level.
- Inspect tire pressure.
- Examine cutting blades for sharpness and damage.
- Clear any grass clippings or debris from the deck and engine area.
- Verify all safety interlocks are functioning correctly.
2. Engine Maintenance (Kawasaki FR691)
- Oil Change: Change engine oil every 50 hours of operation. Use 15W-50 fully synthetic motor oil for optimal performance.
- Air Filter: Inspect and clean the air filter regularly. Consider an aftermarket Donaldson air filter and housing kit for improved filtration, especially in dusty conditions.
- Spark Plugs: Inspect and replace spark plugs as recommended in the engine manual.
- Valve Clearance: The Kawasaki FR691 engine requires periodic valve clearance adjustment. Consult a qualified service technician for this procedure.
3. Deck and Blade Maintenance
- Blade Inspection: Regularly inspect blades for wear, bends, or cracks. Replace damaged blades immediately. Sharpen dull blades to maintain cutting efficiency.
- Deck Cleaning: Clean the underside of the 52-inch fabricated deck after each use to prevent grass buildup, which can affect cutting performance.
- Spindles: The deck spindles are designed to be lubed for life and do not require grease fittings.
4. Belt Maintenance
- Inspect all belts for wear, cracks, or fraying. Replace damaged belts.
- The mower features self-tensioning belts. Ensure they are properly seated and tensioned.
- If excessive vibration is noted, inspect the main drive belt for proper tension and condition.
5. Storage
- For extended storage, stabilize the fuel, disconnect the battery, and clean the mower thoroughly.
- Store in a dry, protected area.
Troubleshooting
This section addresses common issues you might encounter with your mower.
| Problem | Possible Cause | Solution |
|---|---|---|
| Engine will not start | No fuel; dead battery; spark plug issue; safety interlock engaged; choke not set. | Check fuel level; charge/replace battery; inspect/replace spark plug; ensure PTO is disengaged and parking brake is set; adjust choke. |
| Poor cut quality or deck clogging | Dull blades; excessive grass height; deck not level; engine speed too low; grass buildup under deck. | Sharpen/replace blades; mow at appropriate height (avoiding grass over 1 inch); level deck; increase engine RPM; clean underside of deck. |
| Excessive vibration | Bent or unbalanced blade; loose fasteners; worn or damaged belt. | Inspect and replace damaged blades; check and tighten all fasteners; inspect belts for wear and proper tension. |
| Loss of power during operation | Clogged air filter; low fuel; engine overheating; spark plug issue. | Clean/replace air filter; check fuel level; allow engine to cool; inspect spark plug. |
Specifications
Key technical specifications for the Ariens APEX 52 inch Zero Turn Mower, model 991159.
| Feature | Specification |
|---|---|
| Brand | Ariens |
| Model Number | 991159 |
| Engine | 23 HP / 726 cc Kawasaki FR691 |
| Power Source | Gasoline-powered |
| Cutting Width | 52 Inches |
| Deck Construction | Fabricated, 5.5 inches deep, 10-gauge steel |
| Transaxles | Hydro-Gear ZT-3100 |
| Adjustable Cutting Height | Up to 5.5 Inches (15 positions) |
| Operation Mode | Automatic |
| Item Weight | 816 Pounds |
| Product Dimensions (D x W x H) | 79"D x 68"W x 40"H |
| Material | Alloy Steel |
| Seat | High Back Premium Seat with Padded Armrests |
Warranty Information
Your Ariens APEX 52 inch Zero Turn Mower is covered by a manufacturer's warranty. Specific warranty terms and conditions are provided with your purchase documentation. Please retain your proof of purchase for warranty claims.
For detailed warranty information, including coverage periods and exclusions, refer to the warranty statement included in your product packaging or contact an authorized Ariens dealer.
Customer Support
If you require assistance with your Ariens APEX mower, have questions about operation, or need to schedule service, please contact Ariens customer support or an authorized Ariens dealer.
When contacting support, please have your model number (991159) and serial number readily available to expedite assistance.
