Background
The Craftsman Trimmer 636.796670, produced by Echo & Shindaiwa for Sears, is a gas-powered bushwacker. The device comprises a 2-cycle air-cooled engine, with a diaphragm type carburetor and a fuel tank capacity of 17.5 fl.oz. The fuel used is a gasoline and oil mix with a ratio of 16:1. The device weighs 10.5 lbs and has dimensions of 35.5 x 8.7 x 8.6 inches. The trimmer operates at 8000 RPM, with a cutting speed of 32.2 strokes per second.
The 636.796670 model is designed for trimming grass, small bushes, and saplings up to 1/4" in diameter. It employs a dry centrifugal clutch, which engages at 3800 RPM. The trimmer head can be adjusted for either vertical or horizontal cutting. To operate this trimmer, the correct fuel mix is added, the engine is started, and then the device can be guided in either a horizontal or vertical motion to perform the desired trimming. Regular maintenance of this device includes inspections and cleaning of the engine air filter, spark plug, blades, and gear case.
Technical Specifications
- Engine: 2-cycle air cooled, 20.3cc
- Carburetor: Diaphragm type
- Fuel Tank Capacity: 17.5 fl.oz (0.5L)
- Fuel: Gasoline and oil mix ratio 16:1
- Spark Plug: NGK BM7A or Champion CJ6
- Lubrication: Fuel/oil mix
- Dry Weight: 10.5 lbs (4.8 kg)
- Dimensions: 35.5 x 8.7 x 8.6 in
- Tooth Pitch: 0.98"
- Engine RPM: 8000 rpm
- Cutting Strokes: 32.2 times/sec at 8000 rpm
- Drive System: Dry centrifugal clutch
- Clutch Engagement: 3800 rpm ±200 rpm
- Blade Drive: Double cam drive
Warranty
The Craftsman Trimmer 636.796670 comes with a 2-year limited warranty. This warranty covers defects in materials and workmanship but does not include expendable parts that are prone to normal wear and tear such as blades and spark plugs. In order to claim the warranty, customers should reach out to Sears service centers across the United States.