Looking for a great lawn mower tune up? Contact Trevors Power Equipment. We will replace the spark plug, air filter, oil filter, fuel filter where applicable. Replace the fuel hose if necessary. Change the engine oil. Sharpen the blades. Adjust the cables. Check belts, pulleys, output shafts, and drive shafts. Inspect engine and body for abnormal wear or damage. Start and run unit, set the engine speed, and drive speed. Engage the blades and test output. You can expect to pay around $45 for Trevor’s complete lawnmower tune up.