Valve gaps

navydad2022

Well-Known Member
Joined
Dec 9, 2022
Threads
16
Messages
148
Hello , trying to set the gaps clearance on my Snapper rear engine 21A907-0124-E1.Its a 12 hp B&S .set them with engine cold or hot?
 

StarTech

Lawn Royalty
Top Poster Of Month
Joined
Feb 19, 2020
Threads
79
Messages
10,274
Cold. And Briggs says do it with the piston 1/4" down pass TDC compression to avoid setting the intake valve on top the ACR action.

ACR = Automatic Compression Release
 

navydad2022

Well-Known Member
Joined
Dec 9, 2022
Threads
16
Messages
148
Cold. And Briggs says do it with the piston 1/4" down pass TDC compression to avoid setting the intake valve on top the ACR action.

ACR = Automatic Compression Release
Is the clearance usually 3 on intake 5 on exhaust
 
Top