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Discussion Starter · #1 ·
2 problems

I got a 30" 10.5 ho Murray. A little rider. I bought it and it was surging bad. Cleaned carb. Still surged. Changes spark plug, air filter and fuel filter. Still surged. I'm going to try and clean out the lines and tank.

The other problem is I can only get it started by jumping the battery to the starter.
I replaced the key switch and relay. It makes no clicks, no sounds.
The seat switch works bc when I jump it I can let off the seat and it will start

Any help would be very appreciated.
 

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Discussion Starter · #3 ·
Yes it's the Briggs engine.
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Thanks for the reply. If I drive at full speed and/or blade on, the surge eases up.

Also. I have cleaned the fuel system. I have dismantled fuel system twice, each time I do, it runs smooth for about a minute. Then comes the surge.

The relay only has 2 posts. I'll send post pics as soon as I can
 

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Discussion Starter · #5 ·
Thanks! I did put a new carb on it. It fits and looks 98% the same except the new one has two screws for adjustment. The old one only had one. Wrong carb?
It's still surging.
 
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