McCulloch 12592RB Operator's Manual

Ensure the fuel tank is filled and the oil level is correct. Engage the parking brake, set the throttle to 'Fast', and turn the ignition key to start the mower.
Use SAE 30 motor oil for general use. In colder temperatures, SAE 10W-30 oil can be used for improved start-up.
Sharpen the mower blades every 25 hours of operation or at the start of each mowing season to ensure a clean cut.
Uneven cutting may be due to dull blades, uneven tire pressure, or an uneven deck. Check and address these issues for a level cut.
Check the fuel level, oil level, and ensure the spark plug is clean. Also, verify that the battery is charged and the air filter is not clogged.
After use, allow the engine to cool, then use a hose to wash off grass clippings and debris from the deck. Avoid spraying water directly on the engine.
Check the battery terminals for corrosion and clean if necessary. Ensure the battery is charged, especially before off-season storage.
Regular maintenance, such as keeping the air filter clean, using fresh fuel, and maintaining sharp blades, can improve fuel efficiency.
Excessive vibration could be due to an unbalanced blade, loose parts, or debris stuck in the deck. Inspect and fix any of these issues.
Before storage, clean the mower, change the oil, remove the battery, and add a fuel stabilizer. Store in a dry and sheltered location.