Simplicity 1690630 5116 Parts Manual

To check the oil level, park the tractor on a level surface and turn off the engine. Wait for a few minutes to let the oil settle, then remove the dipstick, wipe it clean, and reinsert it fully. Remove it again to check the oil level. It should be between the full and add marks.
To change the air filter, first ensure the tractor is turned off and cooled down. Locate the air filter cover, remove it, and take out the old filter. Insert a new filter of the same type and replace the cover securely.
If the tractor won't start, check the battery for charge and connections. Ensure the fuel tank has fresh gasoline and the fuel line is not blocked. Inspect the spark plug for fouling and clean or replace it if necessary.
The recommended tire pressure for the front tires is typically around 14 PSI and for the rear tires about 10 PSI. Always check the owner's manual for the exact specifications for your model.
Regularly clean the mower deck to prevent grass buildup. Sharpen the blades at least once a season, and check the belt for wear and tension. Lubricate the spindles and other moving parts as specified in the manual.
Excessive vibration could be due to unbalanced blades or debris stuck in the mower deck. Check the blades for balance and sharpness, and clean out any debris. Inspect the spindle bearings and replace them if worn.
It's recommended to change the oil every 50 hours of use or at the start of each season, whichever comes first. Always use the oil type specified in the owner's manual.
To winterize, clean the tractor thoroughly, change the oil and filter, and add a fuel stabilizer to the gasoline. Remove the battery and store it in a cool, dry place. Cover the tractor to protect it from dust and moisture.
To adjust the cutting height, locate the height adjustment lever, usually near the driver's seat. Move the lever to the desired cutting height position. Ensure the deck is level side-to-side for an even cut.
Overheating could be due to a clogged air filter, low oil level, or debris blocking the cooling fins. Check and clean the air filter, ensure there's enough oil, and clear any debris from the engine's cooling areas.