Replace the decompression valve. also check for carbon buildup on top of piston. usually when a saw stops on its own after 5 min or so.... the piston and jug are scored and need to be replaced.
TS420'S HAVE SEVERAL PROBLEMS, I DO NOT RECOMEND BUYING ONE... THE AIR FILTER HOUSINGS STRIP OUT, THE CARBURETORS LEAK OUT THE RIGHT SIDE THROTTLE SHAFT CAUSING IT HARD TO START AND IDLE AND REVING PROBLEMS, I HAVE ALSO REPLACE ABOUT 25 CYLINDER AND PISTONS IN ONE YEAR ON ABOUT 30 SAWS SOLD.... I WOULD RECOMEND BUYING A TS700 OR LOOK AT OTHER BRANDS, MOST PARTS ON THIS SAW SOME FROM CHINATS420'S HAVE SEVERAL PROBLEMS, I DO NOT RECOMEND BUYING ONE... THE AIR FILTER HOUSINGS STRIP OUT, THE CARBURETORS LEAK OUT THE RIGHT SIDE THROTTLE SHAFT CAUSING IT HARD TO START AND IDLE AND REVING PROBLEMS, I HAVE ALSO REPLACE ABOUT 25 CYLINDER AND PISTONS IN ONE YEAR ON ABOUT 30 SAWS SOLD.... I WOULD RECOMEND BUYING A TS700 OR LOOK AT OTHER BRANDS, MOST PARTS ON THIS SAW SOME FROM CHINA
Answers & Comments
Replace the decompression valve. also check for carbon buildup on top of piston. usually when a saw stops on its own after 5 min or so.... the piston and jug are scored and need to be replaced.
TS420'S HAVE SEVERAL PROBLEMS, I DO NOT RECOMEND BUYING ONE... THE AIR FILTER HOUSINGS STRIP OUT, THE CARBURETORS LEAK OUT THE RIGHT SIDE THROTTLE SHAFT CAUSING IT HARD TO START AND IDLE AND REVING PROBLEMS, I HAVE ALSO REPLACE ABOUT 25 CYLINDER AND PISTONS IN ONE YEAR ON ABOUT 30 SAWS SOLD.... I WOULD RECOMEND BUYING A TS700 OR LOOK AT OTHER BRANDS, MOST PARTS ON THIS SAW SOME FROM CHINA