In fact, using fuel that is too high in octane can sometimes lead to inefficient combustion and carbon buildup over time. A quick check of the smell and clarity of the gasoline in the tank can reveal if it has gone bad.
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To combat this, always fill the tank with fresh fuel at the beginning of the mowing season. Maintaining a Clean Fuel System To ensure optimal combustion, the fuel system must remain free of contaminants.
Even with E10, moisture can separate from the ethanol blend over time, leading to phase separation at the bottom of the fuel tank. Persistent hard starting after confirming fresh fuel may indicate a clogged carburetor that requires disassembly and cleaning to remove varnish deposits.
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The Critical Practice of Fresh Fuel Perhaps the most common cause of mower problems is stale gasoline. Always use a funnel with a fine mesh filter when filling the tank to catch dirt and debris.
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