Briggs hard starting

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  #1  
Old 04-14-04, 07:45 AM
slim
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Briggs hard starting

I have a lawnmower with a model 93902, type 3117-01 Briggs and Stratton that takes 10 -12 pulls to start, runs slow for a number of seconds and then runs well. It also starts on first pull every time after warmed up. How can I get this to start easier on first pull?
 
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Old 04-14-04, 09:31 AM
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It could be as simple as that your sparkplug is very dirty and needs replacing. Or it could be that your carb is starving for fuel on a cold start, it could be that you are not using fresh gas. Let us know if your using fresh gas or not, and also check your sparkplug.
 
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Old 04-14-04, 10:58 AM
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This engine has a diaphragm accuated choke - in other words, an automatic choke. You will likely find you will need to replace this diaphragm and you should be good. Briggs# - 391681 diaph. or the rebuild kit# - 494623. Either one of of these Briggs parts comes with instructions. Follow these, especially in regard to pre-loading the diaphragm spring.
 
  #4  
Old 04-14-04, 04:21 PM
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The choke could very well be the cause, but I would still not want to rule out a dirty sparkplug. I have had a hard time starting a engine before when come to find out the sparkplug was extremly tard and carbined up.

Let us know how it goes.
 
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Old 04-14-04, 11:30 PM
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Hello slim!

I agree with puey61. You described the symptoms of a bad diaphragm perfectly. One other less common thing that can cause your problem is valve clearance problems.
 
  #6  
Old 04-21-04, 04:22 PM
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How'd you make out with your problem?
 
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