28 hp van guard surging

[gregjo1948]

28 hp Briggs Van Guard with EFI is surging. How do I adjust or repair this problem? thank you, gregjo1948

 

[mechanic mark]

Post your engine model xxxxxx, type xxxx, trim xx, code xxxxxxx numbers. Are you using 93 octane gas with fuel treatment to take care of ethanol problem ? What brand of fuel treatment? Stay away from Stabil fuel treatment.

Results

www.briggsandstratton.com

See Repair Manual, you will need a code reader or back to Dealer for repairs.

 

[gregjo1948]

49E877-0005 With a compression ratio of around 8.5 to 1, these engines don't need high octane gas.

 

[mechanic mark]

https://www.google.com/search?q=PERFORMANCE+93+OCTANE+GASOLINE+VS.+87+OCTANE+GASOLINE&oq=PERFORMANCE+93+OCTANE+GASOLINE+VS.+87+OCTANE+GASOLINE&aqs=chrome..69i57.88067j0j4&sourceid=chrome&ie=UTF-8

I disagree with you. I use 93 octane gasoline in everything from pickup truck to outdoor power equipment. I use 5w-30 full synthetic oil in my Vanguard engine per instructions in Operators Manual. I suggest you carefully read your engine manual. Vanguard Big Blocks use 15w-50 full synthetic per recommendations in Engine Manuals. I also use B&S OEM parts for my Simplicity lawn tractor.

 

[gregjo1948]

Surging fixed by adjusting governor.