I need some advice please. I’ve recently bypassed the oil pump on my Yamaha G1 golf cart, and now I’m scratching my head over the right gas/oil mix to use. The manual’s suggestion seems way too lean, and I’m terrified of damaging my engine. Has anyone tackled this before? What mix ratio did you find effective?
Response
I faced a similar challenge with my G1. After bypassing the oil pump, I experimented and found that a 50:1 mix using a top-notch two-stroke oil hit the sweet spot. It kept my engine running smoothly without any smoke issues. It’s definitely worth trying.
Solutions that worked for users
| Solution | Users Who Found Success | Approx. Cost (USD) | Approx. Time Needed (Minutes) |
|---|---|---|---|
| 50:1 Mix Ratio with Quality 2-Stroke Oil | 3 | $5 – $20 (for oil) | 10 – 15 |
| 60:1 Mix Ratio with Quality 2-Stroke Oil | 2 | $5 – $20 (for oil) | 10 – 15 |
| 100:1 Mix Ratio with Amsoil | 1 | $10 – $25 (for Amsoil) | 10 – 15 |
Symptoms
- Confusion and concern about the correct fuel mixture after bypassing the oil pump.
- Fear of engine damage due to incorrect oil mix ratio.
Possible Causes
- The absence of clear, reliable guidance on the appropriate gas/oil mix ratio for Yamaha G1 golf carts with bypassed oil pumps.
- Different engine conditions and usage patterns necessitating varied mix ratios.
Comprehensive Solutions
- 50:1 Mix Ratio with Quality 2-Stroke Oil
- What I Did: Mixed gasoline and oil at a 50:1 ratio using a premium two-stroke oil.
- Outcome: The engine ran efficiently without signs of oil starvation or excessive smoke.
- Personal Experience: Noticed an immediate improvement in engine performance without any negative effects.
- Detailed Steps:
- Select a high-quality two-stroke oil, preferably one that’s environmentally friendly and offers clean burning.
- Calculate the mix: For 1 gallon of gas, you’ll need 2.6 ounces of oil. Use a measuring cup for accuracy.
- Mix the oil and gas in a clean, separate container to ensure thorough blending. Shake the container gently.
- Carefully pour the mixture into the golf cart’s fuel tank.
- Run the engine for a few minutes to circulate the mix.
- Expert Tips:
- Always mix in a well-ventilated area to avoid inhaling fumes.
- Use a funnel to prevent spills when transferring the mix to the fuel tank.
- Check the spark plug after a few runs. A sooty plug indicates a too-rich mix, while a whitish plug suggests a lean mix.
- 60:1 Mix Ratio with Quality 2-Stroke Oil
- What I Did: Used a 60:1 mix ratio with a trusted brand of two-stroke oil.
- Outcome: Effective lubrication with slightly less oil than the 50:1 mix.
- Personal Experience: This ratio worked well for my moderately used cart.
- Detailed Steps:
- Choose a reputable two-stroke oil brand.
- For the 60:1 ratio, use about 2.1 ounces of oil per gallon of gasoline.
- Mix the oil and gas in a clean container, shaking well.
- Transfer the mix to the golf cart’s fuel tank using a funnel.
- Allow the engine to idle for a short period to distribute the mix.
- Expert Tips:
- Store any unused mixture in a cool, dry place, away from direct sunlight.
- Regularly inspect the exhaust for signs of unburnt oil, indicating a too-rich mix.
- 100:1 Mix Ratio with Amsoil
- What I Did: Opted for a leaner 100:1 ratio using Amsoil for a cleaner burn.
- Outcome: Good engine performance with reduced exhaust deposits.
- Personal Experience: Chose this for its effectiveness in high-performance engines.
- Detailed Steps:
- Acquire Amsoil or a similar high-quality synthetic two-stroke oil.
- Mix at a 100:1 ratio (about 1.3 ounces of oil per gallon of gas).
- Stir the mixture thoroughly before adding it to the fuel tank.
- Run the engine to ensure the mix is evenly distributed.
- Expert Tips:
- Ideal for those seeking minimal exhaust residue.
- Monitor engine performance closely, as lean mixes can sometimes lead to higher wear.
Golf Cart Models Where This Worked
- Yamaha G1 Golf Cart (Various Years)