carburetor problems

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  #1  
Old 06-05-04, 04:06 PM
Doir
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carburetor problems

I have a Sears model 917.380590 lawn mower that has a carburetor with a red rubber primer on the side and you normally have to prime a few times and then pull start it. After running out of gas I refilled it and now when I start it up it will idle O.K. but when I increse the speed it will run a few seconds and then die unless I press the red primer at which time it will run a few more second and die. Can you tell me why???
 
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  #2  
Old 06-05-04, 04:51 PM
Azis
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Without researching the exact model of your mower I may be off on this but, if you carburetor has a sediment bowl on it (silverish looking can on the bottom) then this may help.
Remove the sediment bowl, the bolt has a hole that lets fuel into the main jet, make sure it is cleared, (It most likely is if it will idle) with the bowl removed, look up into where the bolt for the bowl threads into. You should see another screw with a slot. Remove it, this is your main jet, make sure its clear. Put it all back together and give er a rip.
Happy mowing Hopefully

Az
 
  #3  
Old 06-05-04, 06:20 PM
Doir
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Originally Posted by Azis
Without researching the exact model of your mower I may be off on this but, if you carburetor has a sediment bowl on it (silverish looking can on the bottom) then this may help.
Remove the sediment bowl, the bolt has a hole that lets fuel into the main jet, make sure it is cleared, (It most likely is if it will idle) with the bowl removed, look up into where the bolt for the bowl threads into. You should see another screw with a slot. Remove it, this is your main jet, make sure its clear. Put it all back together and give er a rip.
Happy mowing Hopefully

Az
Thank you for your reply. Have removed the bowl and the hole was clear, However there is no screw with a slot anywhere within the bowl or the area inside where the screw holds the bowl on. The jet was clear because I ran solvent through it and it appeared to flow free. Have reassembled and cannot seem to be able to even start it now. Maybe I'll just go buy an electric mower instead!!
 

Last edited by Doir; 06-05-04 at 08:45 PM.
  #4  
Old 06-05-04, 11:35 PM
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Hello Doir!

Remove the bolt that holds the bowl on again. Look carefully...there are 4 holes in it. 2 oppose each other near the head of the bolt. One goes down through the center. One more tiny one (the one that gives the most trouble) is in an unthreaded section of the bolt near the end. Use a piece of wire or tip cleaner to clean these holes well.
 
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