Free Shipping.

Expert Service.

Call 888-575-6570

Koso Mini 3 Air/Fuel Ratio Meter

Item: 349456

$198.86

Universal Fit: Review specifications carefully.

In Stock - Ships Today!

Koso Mini 3 Air/Fuel Ratio Meter


  • Allows you to monitor and adjust air/fuel mixture for more power and peak performance
  • Specially designed to help tune carbureted or fuel-injected 4-stroke engines
  • Easy installation to 12V systems by connecting the sensor to the exhaust system
  • Includes gauge unit, sensor, bung and cap
  • 30.5mm (1.2") L x 60.5mm (2.4") W x 12.3mm (.5") d

Customer Reviews

Write Review

Be the first to review this product. How many stars would you give this product?

Questions & Answers

Ask Question

Is it water proof?

Yes, these A/F meters are built to JIS D 0203 S2 heavy water spray standards making them suitable for use on motorcycles and ATVs. For this test, the meter is subjected to heavy water spray for one hour at a minimum flow rate of 39.2 liters per minute. They're not meant to be submerged, however, so it's probably not a good idea for use on watercraft.

By Tom
Answer Question

Is this a wideband system?

This meter uses a narrow band system.

By Andy
Answer Question

Have a question? Please ask our experts and customers who own this product.

Ask Question