Valve Adjustment - Briggs 243431 Cast Iron 10 HP

[Landlord101]

My Landlord 101 with the Briggs 10 HP 243431 runs great, but has a pretty loud valve tick when running at full operating temperature.  According to the BRIGGS & STRATTON Repairman's Handbook engines 1919-1981 CE8069, valves are adjusted by grinding the seat or stem to achieve the correct clearance.

Has anyone got experience with this?  Seems like a job for a machine shop.  I can't find much on it via web searches, including this site.

[dhoadley]

I'm not a very skilled mechanic, but I have done this job. There's a small access plate where the valve stems meet the lifters. With that removed and the head off, rotate the engine until the valve is fully seated and check the gap with a feeler gauge. If the gap is too small, remove the valve and lightly grind the base of the stem. I then put the valve back and pressed down with my thumb to mimic the spring. repeat as needed and then reassemble. I have no idea how to remedy a gap that is too large. Good luck, Dave

[Landlord101]

According to the book, if clearance is too much you are to cut the valve seat.  Question is can this be done on an assembled engine or is it a bare block machining job?  Kind of inconvenient as an "adjustment".  Image below is from the book.

[Landlord101]

The special instructions appear later in the section, including the tool part numbers for grinding and lapping the seats.  Guess I could have read further...

Edited July 29, 2024 by Landlord101

[Bill725]

The tick is normal and is from the valve clearance. To measure valve clearance, remove the breather, put the piston at TDC on the compression stroke and measure the valve clearance with a feeler gauge. The intake valve clearance spec is 0.007-0.009" The exhaust valve clearance spec is 0.017-0.019".