Question about Yard Machines 24a 021h700 4.5 Horsepower Chipper/Shredder/Vacuum, Push Model

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Same Problem with the 4.5hp B.S. 21" Yardmachine Walkbehind Mower

I have the 4.5hp 21" yardmachine walkbehind and mine is doing the same thing. The govenor springs are ok. Changed spark plug,gas,oil airfilter. Mine runs high then low to almost a stall and it continues to do that until it runs out of gas. I have contacted a few people and they seem to think its the 2 springs that control the idle speed. Mine seem to be in check. I have tried to adjust the springs the best I can but I feel even if i have them perfect it wouldnt fix the problem. I want to fix this mower only so I dont have to buy another one. But at the same time I dont want to put ANYMORE money into the heep if it will not work. Please HELP!!! Thanks!!!

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  • jeffrey_x_ti Jun 17, 2009

    This is how its reads: 10H902 0285 E1 04011252





    Thanks for your quick response!!!

    jeff

  • jeffrey_x_ti Jun 25, 2009

    It helped a little bit... but not completley. I just sold it to a friend who new it had a little problem and I just bought a new mower. however, your directions / instructions were perfect! Thanks! A+ Thumbs Up~!~

  • Dwain Pippen May 11, 2010

    Sounds like a fuel delivery problem to me. What is the Model # on the engine, not the one on the deck. Should be around the sparkplug. There will be a Model-Type- Code stamped into the starter cover.

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This is what I would do... Remove the fuel tank and carb assy.. Two bolts, one behind the gas cap and one on the end of the tank. Pull it straight off the intake pipe then unhook it from the throttle link. Now, unscrew the carb from the tank. Clean the carb with a can of carb cleaner. Slip the screen off the pickup and make sure it's clean. Discard the pump diaphragm and gasket. Buy a new pump diaphragm kit, part #795083. Clean the top of the tank where the pickup with the screen fits into. Put it back together. Remember to put the rubber diaphragm against the tank and the gasket on top of it then the carb. Don't forget to attach the breather tube when you're putting it back on the engine. That should fix 'er up. Also, if the rubber ring and plastic retainer ring came off on the intake pipe when you pulled the carb and tank off, put them back in the end of the carb before sliding it back on the intake.

Posted on Jun 17, 2009

  • Dwain Pippen Jun 25, 2009

    Did that fix you up? It should have. If so, how about a 'thumbs up'..........:)

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Remove blades and put three guinnie pigs under it

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