Jun 20, 2009 I purchased my Toro weedeater in 2007. It uses a 50:1 gas/oil ratio. The proper ratio of fuel and oil is 50-to-1, meaning for every one gallon of gasoline, you must add 2.6 ounces of two-cycle engine oil. Toro recommends using a high quality two-cycle synthetic.

• Model #: 51974
• Serial #: 310000001 - 310999999
• Product Type: Trimmers

Assembly Drawings

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Toro Weed Eater Parts

Toro Weed Wacker Fuel Oil Ratio Chart

• Model #
  51974
• Serial #
  310000001 - 310999999
• Product Name
  18in Straight-Shaft Gas Trimmer
• Product Brand
  Toro
• Product Type
  Trimmers
• Product Series
  Trimmer, Straight Shaft (OWT/TTI)
• Swath
  18 inch
• Engine Starter
  Recoil

Toro Weed Wacker Fuel Oil Ratio For Stihl Chainsaws

• Engine: Engine Oil Type
  Toro 2 cycle / NMMA-TCW3
• Engine: Mix Ratio
  50:1 (2.6 oz./gal.)
• Engine: Spark Plug Gap
  .025'/ .64mm
• Engine: Spark Plug
  Champion RCJ4, RCJ6Y