The Husqvarna YTH 18542 is a 18.5 HP riding lawn mower with a 42-inch cutting deck, featuring a Briggs & Stratton engine, hydrostatic transmission, electric start, cruise control, adjustable cutting height, and a comfortable high-back seat. This manual covers safety, operation, maintenance, troubleshooting, and storage procedures to ensure optimal performance and longevity of your mower.
Key components: 18.5 HP Briggs & Stratton engine, 42-inch stamped steel cutting deck, Hydrostatic transmission, Electric start with key, Cruise control, Adjustable high-back seat, 6-position cutting height adjustment, Dual-lever deck lift system, Headlights, Cup holder.
| Feature | Description |
|---|---|
| Engine | 18.5 HP Briggs & Stratton, single-cylinder, OHV |
| Cutting Width | 42 inches |
| Transmission | Hydrostatic, foot-pedal controlled |
| Starting System | Electric key start with 12V battery |
| Cutting Height | 1.5 to 4 inches, 6 positions |
| Deck Lift | Dual-lever manual lift |
| Fuel Capacity | 2.5 gallons |
| Seat | Adjustable high-back with armrests |
| Drive System | Rear-wheel drive |
| Mulching Capability | Optional mulch kit available |
Read all instructions before operating. Always wear appropriate safety gear.
WARNING! Gasoline is flammable; refuel outdoors with engine off and cool. Avoid carbon monoxide poisoning – never operate in enclosed spaces.
Unpack and inspect all parts. Assembly requires basic tools.
CAUTION! Ensure all bolts are tightened securely. Test brakes and controls before first use.
Familiarize yourself with all controls before starting.
Dashboard: Ignition key, Headlight switch, Hour meter, Blade engagement lever, Cruise control lever, Choke (if equipped).
Pedals: Forward/reverse drive pedal (hydrostatic), Brake pedal, Clutch/brake pedal (for blade engagement).
Levers: Parking brake lever, Deck lift levers (left and right), Height adjustment lever.
Starting Procedure: 1. Sit on seat. 2. Set parking brake. 3. Disengage blades. 4. Move throttle to fast position. 5. Turn key to start. Stopping: Release drive pedal, engage brake, disengage blades, turn key off, set parking brake.
For best results, mow when grass is dry.
Tip: Sharpen blades every 25 hours for clean cut. Change mowing pattern weekly.
| Interval | Task |
|---|---|
| Before each use | Check tire pressure, fuel level, debris under deck |
| Every 8 hours | Check engine oil level |
| Every 25 hours | Sharpen/replace blades, check battery terminals |
| Every 50 hours | Change engine oil, check air filter |
| Every 100 hours | Replace air filter, spark plug, check belts |
| Seasonally | Grease fittings, check transmission fluid |
Note: Refer to engine manual for specific engine maintenance.
Briggs & Stratton engine requires regular maintenance.
WARNING! Disconnect spark plug wire before performing any maintenance.
Proper storage prevents fuel system damage.
CAUTION! Do not store with gasoline in tank over 30 days without stabilizer.
| Symptom | Possible Cause | Corrective Action |
|---|---|---|
| Engine won't start | Dead battery, empty fuel, safety switch | Charge battery; add fuel; ensure seat is occupied and blades disengaged. |
| Poor cut quality | Dull blades, low engine speed | Sharpen/replace blades; set throttle to full speed. |
| Loss of power | Clogged air filter, old spark plug | Clean/replace air filter; replace spark plug. |
| Vibration | Unbalanced blade, loose parts | Balance or replace blade; tighten deck bolts. |
| Hydrostatic transmission slips | Low fluid, drive belt worn | Check fluid level; inspect/replace drive belt. |
Reset: Disconnect battery for 5 minutes to reset electrical system if needed.
Husqvarna YTH 18542 includes a 3-year limited warranty for residential use. Warranty covers defects in materials/workmanship; does not cover normal wear, misuse, or lack of maintenance. Keep receipt for proof of purchase.
Support: For technical assistance, parts, or service, contact Husqvarna at 1-800-487-5962 or visit www.husqvarna.com/us. Have model and serial numbers ready (located on frame under seat).