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Discussion Starter · #1 ·
I have a 13 hp Briggs on a 1995 John Deere Sabre that will only run with the choke closed. I overhauled the carb and changed the intake valve with a new Briggs valve. It still pops through the carb and will not run with out choke closed. Please help.
 

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popping or spitting back through carb. is usually an indication of intake valve not fully closing during exaust stroke or a partually sheared woodrift key on flywheel.
 

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Discussion Starter · #3 ·
I have put in a new key and lapped and set the proper clearence on a new exhaust valve. Seems like the motor has a lot of blowby with compression at 60 PSI.
 
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