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I was wondering if anyone knows the proper valve lash on a 15.5 briggs? I saw somewhere that the intake was a thousand or two larger than exhaust and i saw that both were set at .004 any input would be great. also it said set them a 1/4" past dead center past top. thanks

Will tell you if you post up the engine numbers, or better still.....!

Assuming OHV single cylinder then the valve clearance will be 0.03"-0.05 inlet and 0.05-0.07" for exhaust.
Always set clearances with piston quarter past TDC on power stroke.
https://www.briggsandstratton.com/us/en/support/faqs/servicing-the-valves

pugaltitude said:

Assuming OHV single cylinder then the valve clearance will be 0.03"-0.05 inlet and 0.05-0.07" for exhaust.
Always set clearances with piston quarter past TDC on power stroke.
https://www.briggsandstratton.com/us/en/support/faqs/servicing-the-valves

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Thanks for the info it worked great!!

EngineMan said:

Will tell you if you post up the engine numbers, or better still.....!

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Thank you very much I copied the chart it is really great and got everything set

EngineMan said:

Will tell you if you post up the engine numbers, or better still.....!

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Hi guys I'm having the same problem with my mower I'm trying to set the valves now but looking at the chart above doesn't correspond with any model numbers on mine
Its 15.5 hp ohv only model number I can see is on the valve cover 282H07

Intake .003”-.005”. Exhaust.005”-.007”

Rivets said:

Intake .003”-.005”. Exhaust.005”-.007”

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Think I have it sorted but unfortunately I have rung the center torque lock nut
Any idea where I'd get one
Checked briggs parts but cant find it
Maddening

Would need the type off the valve cover. 282H07-????.

StarTech said:

Would need the type off the valve cover. 282H07-????.

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Thanks for the help so far it's been brilliant
282H07-0111E1 code 04090ZD

I believe you are referring the to screw in the adjuster. Briggs only sell it in a kit.

Briggs PN 691986 ADJUSTER, Rocker Arm

StarTech said:

I believe you are referring the to screw in the adjuster. Briggs only sell it in a kit.

Briggs PN 691986 ADJUSTER, Rocker Arm
View attachment 52063

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Yea that looks like the part ok
Thanks a million

Nothing special about it, it is just a grub screw with a torqz hole in place of a std hex hole .
Just remember you adjust with the nut and lock with the screw which is the opposite to all other engines .