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The CAT 2W-3747 is an official ignition transformer (unshielded ignition coil) manufactured by Caterpillar. It typically costs around $164 to $178 USD and increases battery voltage to supply high-voltage sparks (up to 34 kV) to spark plugs in industrial gas engines and generator sets.
Key SpecificationsType & Output: Unshielded ignition transformer, 34 kV maxDimensions/Weight: Approx. 6.18" x 3.93" x 2.79", 1 lb
Cross-Reference: Altronic 501061CompatibilityEngines & Gensets: Fits various Caterpillar models including G3304–G3616, G379–G399, and SR4 generators
