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Engine Starting Problem

mower17's Avatar

Join Date: Feb 2003
Posts: 365

05-05-03, 06:11 PM   #1  
old briggs

My grampa has an old 3 hp briggs on a murray push mower. The engine is dated 09/14/79. For some reason he has to start the engine running with a certain fuel/air mixture. Then after it starts he has to adjust the needle valve. Today I took the carburetor apart and cleaned it, I checked the tank for trash/water, and I cleaned the plug. I also tried without the air filter. Would all he need is a carburetor kit. There is just one needle valve and one diaghram gasket. If he would have to change it, how much would the kit cost? After the engine gets started, I think he turns the needle valve counter-clock wise. I have been trying to figure this one out for a long time. Thanks for the help.

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cheese's Avatar
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Join Date: Jul 2001
Posts: 16,567

05-05-03, 07:38 PM   #2  
Hi mower17

Sounds like a diaphragm kit may be needed. It should be less than $5.00.

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God bless!

mower17's Avatar

Join Date: Feb 2003
Posts: 365

05-05-03, 08:34 PM   #3  
Thanks Cheese. Once again, you were a big help.

Joe_F's Avatar
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05-06-03, 08:01 AM   #4  
Sure sounds like a simple repair to me. Think of it this way, if it runs and runs OK except for that, it can't be much to it .

butterfingers's Avatar

Join Date: Aug 2002
Posts: 97

05-06-03, 04:19 PM   #5  
just had this exact same problem with a old 3 or 3.5 hp briggs too. Put a new diphram on it and it runs like a champ.

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