and high quality Highly matched to the original device Sturdy and durable, long service life Part Number:640349 640052 640054 640058 640058A Material:metal Color: Silver Fitment: For 8 9 10 Toro 824 Snow Blower For 50-659 520-926 For Carburetor for 640349 640052 640054 hmsk80 hmsk90 lh318sa l358sa 8hp 9hp 10hp snow blower generator carburetor When the work is not good: 1. Oil circuit problem: fuel tank to carburetor oil supply is not smooth. Check whether the oil circuit is open, whether the tubing is choked or not, and whether there is foreign matter blocking. 2. The idle speed is too low: the new carburetor can not match the machine completely, and the old machine may need higher idle speed because of the aging or wearing of parts. The new carburetor is based on a brand-new machine matching test, the test parameters are qualified after the factory, unable to meet the needs of each customer's different parameters. This situation needs to increase the idle speed: the valve screw at the red circle (clockwise adjustment of 1-2 rings) 3. The negative pressure hole is blocked: the negative pressure hole is blocked also cause the extinguishing situation. Check whether the negative pressure hole in the red circle is blocked when it is installed. Package Contents: 1 x Carburetor 2 x Clamps 1 x Spark Plug 1 x Gasket 1 x Fuel Line 1 x Fuel Filter 1 x Cut-off valve 1 x Assembly Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.