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help w/ 5hp briggs and stratton mower

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help w/ 5hp briggs and stratton mower

Old 06-11-2015, 09:32 AM
  #1  
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Default help w/ 5hp briggs and stratton mower

ok. little yard- little mower. 5 hp push with briggs and stratton eng. Mower has been great for 3 seasons. $50 craigslist find.

last week starts- dies, starts dies, starts dies... carb right?

right



took apart and cleaned, carb cleaner and compressed air. checked gasket and diaphram- check. put back together and on mower starts and runs but throttle was way too high. wide open. (actually never knew that little thing could get spooled up so high)


need help with the 2 springs- levers/throttle thingys and positions. I tried taking a pic when i took apart- smart eh?- but i can not get them to line up or look like pic.

i was able to cut grass by forcing throttle lever down a little but it wants to bog down more in the tall stuff. I believe the springs helped it add more gas when it was needed w tall stuff


thx

(pretty darn easy carbs to work on)
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Old 06-11-2015, 10:25 AM
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that spring is part of the governor. If you put the model # in Google it will probably show you where it goes. Most all small B/S use the same setup.

https://www.youtube.com/watch?v=6q8WEp5qV0o
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Old 06-11-2015, 10:37 AM
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Yep, governor. Does it have a plastic paddle attached to those springs? The paddle blows out when running at regular throttle (shut position), but when the motor bogs down in heavy grass, the paddle moves back in closer to the bladed flywheel and opens a valve to deliver more fuel. Needs the springs set correctly to do so.

Just a thought, but i'd start there. Also, replace the air filter (or test without it). May look clean, but if clogged, it will bog down and run like crap. I have to clean mine regularly and replace at least every year due to the amount of dust here in the desert.
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