21770 - Instructions

No compression. Removed the cylinder head. freed the screw, checked the valve to see if it still sealed. Turned the head over with the valves in it, install a spark plug, fill the head dome with gas and see if any leeks out over a 2 hr period. If not you are good to go. Reinstalled every thing with new gaskets and a new carburetor screw. Set the valves to spec. Complete the rebuild and there you have it. Rebuild the carburetor while you have it apart. This motor runs great !!!

Removed head. Replaced both rocker arms, intake pus rod, push rod guide exhaust and head gaskets. Torqued head in 3 stages to 216 in/lbs. gapped intake to .004 and exhaust to .006 at TDC

Added oil and gas. Now running great

If you need to replace push rods use steel (exhaust) they are the same length
The engine was a Briggs & Stratton 217802 0113 E10604 (2006 year date code)
I used the following
796189 gasket
272475S gasket
697494 push rod
690822 push rod guide
691751 rocker arms

Removed the wheels, attached the shield and replace wheels. Easy-peesy!

First I opened the top of the mower to expose the housing cover. Secondly I removed the four housing bolts to remove the housing cover from the mower. Next I removed the tube breather and installed the new tube breather and replaced the housing cover with the four bolts previously removed and closed the top of the mower. I filled the mower with gas to check for leaks which weren't any leaks. I proceeded to mow the lawn with ease.

Tip mower onto side, raising side to be repaired. Empty gas tank if possible or use rags to prevent gasoline drips onto clean surfaces.

Remove wheel using a 1/2" socket.
Remove wheel height assembly with 1/2" socket and open end wrench to hold nut below the deck.
Position new spring arm over the slot on wheel height assembly plate. Check opposite side to verify correct orientation if needed.
Remove plastic cover from old lever using a small flat blade screwdriver. Slip onto new lever.
Replace wheel height assembly.
Replace wheel.