Hello, all, from sunny and hot Jonesboro, Arkansas.

I am a 65-year-old retired salesman living in Jonesboro, northeast Arkansas, about 80 miles north and west of Memphis, Tn., and 150 miles northeast of Little Rock. I enjoy tinkering with engines, and have done so since I was about 15-years-old. I currently own a Murray riding lawn mower that I have rehabilitated from non-running junk status to a pretty darned good, reliable mower. I initially came to this forum looking for the valve lash specs for my Briggs model 278707 type 1272-E1 engine, but haven't taken the time to search much. I currently have both intake and exhaust set on 4 one-thousandths, but the performance is a little lacking. If anyone has the actual factory specs on this engine, I would appreciate a heads up.

Looking forward to getting acquainted, learning a few new tips, and maybe even imparting some of my knowledge to other members.

Do you have the correct engine model number, I can't find the engine you posted in any of my manuals.

Looking back, I transposed a couple of numbers in my initial post. The correct model number of my engine is 287707, type 1272-E1.
Thanks for any help.

The valve clearance for you engine should be .003-.005 for the intake and .005-.007 for the exhaust. This website might help in the future.

http://www.briggsandstratton.com/sup...B5DCA17EF.ashx

Welcome to LMF, well your just one year ahead of me, I told my wife in a joking manner," if I had known that retirement was so cool, I would have done it 20 years ago", she failed to see the humor!