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Briggs and Stratton starting problem


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  #1  
Old 05-19-2009, 03:55 PM
nitro74cs nitro74cs is offline
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Default Briggs and Stratton starting problem

Last week I got a Briggs and Stratton engine, its a 4hp model, I have been told its off a Merry tiler rotovator. engine is complete, with good spark and compression, however it wont start. i have to take the air filter then put my hand over the air intake to cover it completely then pull the recoil couple of times, then the carb gets flodded with petrol then it would start and keep running with choke on. as soon as i push the choke off it stops.
Does anyone know why it is doing that? Can it be fixed? if so how?
thank you.
forgot to mention, I changed the carburetor diaphram and cleaned the carb.
Thanx for looking.
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Old 05-19-2009, 04:06 PM
ehpower2 ehpower2 is offline
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Default Re: Briggs and Stratton starting problem

if you ask me its either a ignition problem or still something is not right with that carb did you clean out every last bit
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Old 05-19-2009, 04:19 PM
nitro74cs nitro74cs is offline
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Default Re: Briggs and Stratton starting problem

I have cleaned the carb, realy good, changed the diaphram as well and put it back correctly. the carburetor has the pull type choke.
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Old 05-19-2009, 07:06 PM
Sky
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Default Re: Briggs and Stratton starting problem

Did you feild set the mixture screw If not, bottom the mixture screw out DONT TIGHTEN. Back out 1 and a half turns. That will get you into the relm of running proper. Then the screw turns in for a leaner mixture if your getting to much gas which is a sign of black exaust smoke and if your not getting ENOUGH gas, hesitation and popping, back the screw out to richen the mixture.
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Old 05-19-2009, 07:34 PM
Windables Windables is offline
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Default Re: Briggs and Stratton starting problem

lawnmower drove me nuts yesterday doing this same thing changed the spark plug and away she went hope this helps
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Old 05-19-2009, 07:57 PM
Pat Barrett Pat Barrett is offline
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Default Re: Briggs and Stratton starting problem

If you don't find anything else wrong, take the carb off the tank and use some spray carb cleaner to clean the screens on the short and long pick up tubes, if it has both. Most of the time the screens on either will become clogged with stale gas and stop those screens up and it will only run with the choke on. See what happens.
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Old 05-20-2009, 09:16 AM
K D Redd K D Redd is offline
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Default Re: Briggs and Stratton starting problem

Be sure you do not have a loose valve seat in the block. This can cause all kind of weird starting and running issues.

Kent
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Old 05-20-2009, 05:47 PM
nitro74cs nitro74cs is offline
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Default Re: Briggs and Stratton starting problem

Quote:
Originally Posted by Sky View Post
Did you feild set the mixture screw If not, bottom the mixture screw out DONT TIGHTEN. Back out 1 and a half turns. That will get you into the relm of running proper. Then the screw turns in for a leaner mixture if your getting to much gas which is a sign of black exaust smoke and if your not getting ENOUGH gas, hesitation and popping, back the screw out to richen the mixture.
Thank you m8 I will fiddle with that mixture screw then see what happens.
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