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#1
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Briggs Stratton 4HP high idle speed
I found the message I pasted below on this group a few days ago. I had
this exact same problem with the same motor (10A902) 4HP. after reading all the replies I went and replaced the diaphragm. The mower now has a steady idle but it is much much higher than it was before. The mower also seems to run twice as loud as it used to. What do I do to fix this problem. Tim CanadianCowboy My briggs and Strattan mover was working fine up until I ran it dry using every drop of gas. The next time I used the mover it runs rough with RPM's going up and down but never stalling. Is there a block in the carberator from the garbage at the bottom of the tank ? Do I have to take it apart and clean ? Any help would be appreciated !! |
#2
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Briggs Stratton 4HP high idle speed
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#3
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Briggs Stratton 4HP high idle speed
Adjust idle screw.
If he didn't change the screw before or after replacing the diaphragm, that's probably not the cause of a much-higher idle. You might have a vacuum leak, where air is getting sucked into the engine around the gaskets. Make sure the gaskets are all seating properly and the screws are tightened correctly. "Real tight" isn't as important as tightening evenly the several screws that hold a diaphragm or gasket. Good luck,s -- DaveC This is an invalid return address Please reply in the news group |
#4
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Briggs Stratton 4HP high idle speed
having dealt with gaskets in the past I was careful to tighten the screws evenly and not over tighten. Im stumped. On Jul 31, 1:21 pm, DaveC wrote: Adjust idle screw. If he didn't change the screw before or after replacing the diaphragm, that's probably not the cause of a much-higher idle. You might have a vacuum leak, where air is getting sucked into the engine around the gaskets. Make sure the gaskets are all seating properly and the screws are tightened correctly. "Real tight" isn't as important as tightening evenly the several screws that hold a diaphragm or gasket. Good luck,s -- DaveC This is an invalid return address Please reply in the news group |
#5
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Briggs Stratton 4HP high idle speed
tmt wrote:
having dealt with gaskets in the past I was careful to tighten the screws evenly and not over tighten. Im stumped. Float level? Throttle linkage? -- On Jul 31, 1:21 pm, DaveC wrote: Adjust idle screw. If he didn't change the screw before or after replacing the diaphragm, that's probably not the cause of a much-higher idle. You might have a vacuum leak, where air is getting sucked into the engine around the gaskets. Make sure the gaskets are all seating properly and the screws are tightened correctly. "Real tight" isn't as important as tightening evenly the several screws that hold a diaphragm or gasket. Good luck,s -- DaveC This is an invalid return address Please reply in the news group |
#6
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Briggs Stratton 4HP high idle speed
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