Why have I found gas in the oil of my golf cart? (Help needed!)

Recently, I’ve noticed that my golf cart has gas mixed in with the oil. This is causing a lot of trouble, including poor performance and even potential damage to the engine. I really need some help fixing this problem.


I had the same issue with my golf cart. But there’s hope! One solution that really worked for me and several others was fixing the carburetor issues. It’s a common problem and often the culprit behind gas getting into the oil.

Solutions that worked for users

SolutionUsers Who Found SuccessApprox. Cost (USD)Time Needed (Minutes)
Fixing Carburetor IssuesMultiple$20 – $5030 – 60
Replacing Fuel PumpMultiple$50 – $10060 – 120
Installing a Shut-off ValveFew$10 – $2020 – 40

Symptoms and Causes

  • Poor performance or non-starting golf cart.
  • Higher than normal oil level with a gasoline smell.
  • Potential causes include carburetor malfunctions, a faulty fuel pump, or leaks in the fuel system.

Detailed Solutions

  1. Fixing Carburetor Issues
    • What to Do: Thoroughly clean and, if necessary, repair or replace parts of the carburetor.
    • Outcome: Resolves fuel leakage into the oil.
    • Personal Experience: After a detailed cleaning and adjusting the float, my cart was back to normal.
    • Estimated Cost: $20 – $50
    • Time Needed: 30 – 60 minutes
    • Steps:
      1. Carefully remove the carburetor from the engine.
      2. Disassemble it, keeping track of all parts.
      3. Use carburetor cleaner to clean each part, paying special attention to jets and passages.
      4. Check the float for holes and the needle for wear.
      5. Reassemble using new gaskets if necessary.
      6. Reinstall and adjust the carburetor settings.
    • Expert Tip: Always use fresh fuel and regularly check the carburetor’s condition to prevent future issues.
  2. Replacing Fuel Pump
    • What to Do: Swap out the old fuel pump for a new, high-quality one.
    • Outcome: Stops fuel from seeping into the crankcase.
    • Personal Experience: A new pump eliminated the overflow problem.
    • Estimated Cost: $50 – $100
    • Time Needed: 60 – 120 minutes
    • Steps:
      1. Locate your golf cart’s fuel pump.
      2. Disconnect the fuel lines and remove the mounting screws.
      3. Compare the old pump with the new one to ensure compatibility.
      4. Install the new pump and reconnect the fuel lines.
      5. Test for leaks and proper operation.
    • Expert Tip: Regularly inspect the fuel lines and connections for signs of wear or damage.
  3. Installing a Shut-off Valve
    • What to Do: Add a shut-off valve to the fuel line to control fuel flow.
    • Outcome: Prevents fuel from entering the engine when not in use.
    • Personal Experience: This simple addition made a big difference.
    • Estimated Cost: $10 – $20
    • Time Needed: 20 – 40 minutes
    • Steps:
      1. Identify a suitable spot on the fuel line for the valve.
      2. Cut the fuel line carefully.
      3. Install the valve according to the manufacturer’s instructions.
      4. Secure the valve and check for leaks.
    • Expert Tip: A shut-off valve is particularly useful for carts that are stored for long periods.

Extra tips

  • Fuel Quality: Always use fresh, high-quality fuel to prevent carburetor clogging and other issues.
  • Regular Maintenance: Schedule regular check-ups for your golf cart to catch issues early.
  • Storage Tips: If storing your golf cart for an extended period, consider draining the fuel to prevent leaks and contamination.


Ernie loves documenting interesting facts about golf.

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