It can be frustrating when your lawn mower or small engine starter won’t engage, but there are solutions you can take to prevent and correct starter problems. This guide should help you find out how to locate and repair common issues with starters.
If your engine won’t start, the engine itself should be thoroughly checked first to eliminate common engine problems (like a fouled spark plug or fuel issues) as the cause of starting difficulty.
The first step in diagnosing problems with lawn mower starter parts is to make sure the engine can rotate properly by disconnecting the spark plug leads, removing the spark plugs, and turning the crankshaft over slowly by hand.
Warning: Unintentional sparking can result in an electric shock or a fire. Disconnect the spark plug wire and keep away from the spark plug. Use an approved spark checker. Do not check for spark with the spark plug removed.
Also, check for dirt or debris in the starter gear shaft and apply some lithium-based grease to the shaft.
Use the list below to diagnose problems for 12-volt starting systems. If you are testing any parts with a multimeter, you should get a reading of 12 volts or more.
NOTE: To extend the life of the starter, use short starting cycles (five seconds maximum). Wait one minute between starting cycles.
For dirty or worn parts, use our Repair Parts Look-up to find the appropriate replacements. Your local Briggs & Stratton dealer can also assist you in finding and replacing any faulty small engine parts.
For this type of advanced repair, we recommend using a Briggs & Stratton Repair Manual for full detailed instructions on testing for faulty parts or reaching out to a Briggs & Stratton service dealer for assistance.
Using your Repair Manual and a digital multimeter, you can test the starter switch and/or the solenoid to ensure they are working properly. We recommend a Repair Manual for full instructions on checking each part or contacting a Briggs & Stratton dealer for repair help.
WARNING: Always read the engine and equipment manual(s) before starting,operating, or servicing your engine or equipment to avoid personal injury or property damage. See an authorized dealer if you are unsure of any procedure or have additional questions. Find all Engine Safety Warnings.