How to Repair Small Engines

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Small engines mounted to machinery such as lawn mowers, generators, scooters, or go carts have common characteristics that make them unique. Proper maintenance is vital for the prevention of any malfunction. But when a small engine is in need of repair, you can save money on costly service or replacement by knowing what to do. To learn how to repair a small engine, follow these steps.

Steps

1. 1
   Learn how small engines work. Knowing the components of a small engine and how they should correctly function will help you determine any problems they might have. Study the owner's operating procedures or a book detailing the construction and purpose for each component of a typical small engine. Examine the engine thoroughly so that you can identify the various parts.

   
   

   • Though all engines are similar to some degree and share common basic traits, fixing a small engine is relatively simple when compared to larger and more complex mechanisms.
2. 2
   Increase your knowledge through education. Take classes on how to repair small engines from a community college, or at least learn as much as you can on your own. Purchase or rent DVDs or search online for videos. Visual demonstration may help you grasp certain concepts quicker.
3. 3
   Familiarize yourself with the common symptoms. Small engine repair can be made easier if you have the ability to diagnose typical problems. Analyze the troubleshooting charts found on relevant websites. Seek professional advice on why an engine sounds the way it does. Many service centers may give you a free evaluation over the phone. Accumulate a repair chart of problems you encounter for future reference.
   • Gasoline engines require a proper mix of clean fuel and air, as well as an ignition source to function correctly.
   • Many problems related to engines can be traced to the fuel source. Running the engine without enough gasoline or oil may cause it to stall, or damage internal parts.
   • When troubleshooting small engines, you'll find common problems originate with misfiring, many times caused by a fouled spark plug.
   • To check or replace a spark plug, remove the wiring attachment. Using the correct size wrench, unscrew it from the engine. A charred spark plug is fouled and needs to be replaced.
4. 4
   Accumulate the necessary tools and parts. A good quality set of socket wrenches and various sized screw drivers will be common tools you'll require. If you will be performing small engine repairs professionally for others, you may want to consider stocking standard parts like spark plugs, air filters, and mufflers. You could purchase small engine parts at wholesale prices by buying in bulk.

   
   

Warnings

• Practice caution when working with combustible engines due to the potential risk of fire or explosion. Never smoke near small engine gasoline tanks.
• Perform small engine repairs in a well ventilated area to avoid breathing dangerous carbon monoxide and petroleum fumes.

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