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A used carburetor on a concrete floor next to a screwdriver. A used carburetor on a concrete floor next to a screwdriver.
How-To Installation Product & Troubleshooting Problems Power Sport, ATV, UTV, Snowmobiles, Dirt Bikes, and Off-Roading Snow Removal Tips and Tricks Home, Lawn and Outdoor Power Equipment Tips and Tricks
June 10, 2020

HOW-TO TROUBLESHOOT A FUEL SUPPLY / SYSTEM AND CARBURETOR PROBLEMS

When you go to start any small engine or motor, you expect it to start, and hopefully start after the first try. However, issues within the fuel system or fuel supply, as well as trouble in the carburetor can delay getting a task completed.

The ROP Shop's Carburetor with box and parts. The ROP Shop's Carburetor with box and parts.

CARBURETOR: SIGNS THAT YOUR CARBURETOR MAY BE IN NEED OF BEING REPAIRED OR REPLACED

  1. If after several tries you are not able to get your engine to turn over, remove a spark plug. If the engine is getting proper fuel flow then the tip of the plug will be wet. If the spark plug is dry, then there is likely a break in the transfer of the fuel.
  2. Normally you would set your choke to start your small engine and then turn down the coke once the motor is running smoothly. However, if you find that the small engine will not stay running unless the choke is running wide open or even halfway open, then there could be a flow problem. It is possible that the jet or one of the passageways in the carb is either partially or fully blocked. The carburetor would then need to either be repaired and cleaned or replaced. Contact The ROP Shop for a replacement carburetor.
  3. Another possible carburetor issue is if you find that after starting the small engine, it will periodically increase and decrease RPMs. This too is a sign that there could be something restricting the proper flow of fuel. The carburetor would then need to either be repaired and cleaned or replaced. Contact The ROP Shop for a replacement carburetor.
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Picture of The ROP Shop's fuel filter. Picture of The ROP Shop's fuel filter.

FUEL SYSTEM: FOR YOUR ENGINE TO OPERATE AT OPTIMAL LEVELS, THERE MUST FIRST BE OPTIMAL FUEL FLOW

  1. First, check to see if the fuel you are using is not old fuel. Bad gas can cause a multitude of problems both now and in the future.
  2. Be sure that your Fuel shut off valve is in the ‘on’ position. NO GO WITHOUT THE FLOW.
  3. Due to air pressure changes, it is vital to ensure your cap is capable of venting air. Fuel flow will be directly impacted if there is no way to release pent up pressure in the tank.
  4. Does your fuel filter need to be replaced? Just like air and oil filters, engines use a fuel filter to keep your system from getting debris in your system.
  5. Provide adequate distance for your fuel lines from any heat source.

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