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My g16 started acting up yesterday. Gas with brand new battery and rebuilt starter. Before yesterday it ran perfect now when you push on pedal it surges and bucks and usually wont start but, it will start in reverse but runs rough. If it does go forward it is at full throttle only and isn't as fast as it should be. Where do I start? Acts like it isn't getting the fuel it needs but that doesn't explain why it will run in reverse. Any help is greatly appreciated, we use it daily on the farm for chores.
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With ethanol levels in gasoline today, it only takes about six months for deposits to accumulate in the carburetor. Ethanol is hygroscopic, meaning it absorbs water from the air, leading to the formation of gum and varnish deposits. These deposits can clog the tiny jets and passages within the carburetor, disrupting the precise fuel air mixture needed for efficient combustion. This could explain the surging, bucking, and poor performance you're experiencing with your G16. The carburetor’s job is to mix the correct amount of fuel with air for the engine. It does this by drawing air through the air intake, where it is mixed with fuel in a specific ratio before entering the combustion chamber. Any blockage or restriction in the carburetor can lead to an improper mixture, resulting in issues such as rough running, surging, and difficulty starting.
First, verify the air intake is sealed up completely. Any leaks can introduce unmetered air, further complicating the fuel-air ratio and causing poor engine performance. To address any deposits in your carburetor, a thorough cleaning is necessary. Start by removing the carburetor from the engine, taking care to note the positions of any linkages and hoses. Disassemble the carburetor carefully, don’t lose any small parts or screws. Soak the components in a carburetor cleaner solution to dissolve the deposits. Use compressed air to blow out the small passages and jets, making sure they are completely clear. Pay special attention to the float bowl, needle valve, and idle jet, as these areas are particularly prone to clogging. For an even more effective cleaning, consider taking the carburetor to a lawnmower shop or similar service provider for ultrasonic cleaning. This process uses high frequency sound waves in a cleaning solution to remove deposits from hard to reach areas more thoroughly than manual cleaning alone. After cleaning, reassemble the carburetor, replacing all gaskets and seals and reinstall it on the engine.
Whenever possible choose OEM parts because they guarantee the best fit and performance. Aftermarket parts often fall short in terms of quality and compatibility, which can lead to reliability issues. Using OEM parts, especially the carburetor, conforms tuning adjustments are precise and maintain the system's intended performance, while aftermarket parts can create inconsistencies that make tuning unpredictable and potentially reduce the overall running performance.
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