4015 - Overview

about 6 hours to tear down and replace don't do it in the hot sun needed more breaks takes longer, but the new factory heads did it started up 185 lbs of compression almost back to new, so much more power than old one's. FYI take off the motor cover every year clean out the debris (grass-mouse nest- and oil) it blocks the air and COOKS ... Read more THE HEAD it only takes short time and will make that motor last a little longer but it is a BRIGGS engine

Clean engine with a Gunk type product. Remove valve cover. Loosen bolts and remove old cylinder head. One bolt is located inside valve cover area. Remove old gasket and inspect and clean that surface. Attach new head with new gasket using existing bolts. Torque to 18'#s with a cross type pattern. Attach new rocker arms and push rods. Set ... Read more valve clearance to .004 - .006. Attach valve cover with gasket. Check oil level. Start and let it warm up. Let cool remove cover then check valve clearance again. Replace cover.

Had to pull the engine off the rider mower. Drained the oil took shield off the flywheel. Set it upside down on a 5 gal bucket. Took a 7/16 hand wrench to remove governor lever from bottom of engine. Left it in its location. Pulled 10 1/2 " bolts. Split engine case. Found the old governor had broke into pieces. Had to use a magnet t ... Read more o remove all the pieces. Removed the small clip and removed gear. Lubed shaft slid new on put new clip on. Lined governor weights with center piece tapped it in place very lightly. Cleaned gasket flanges pulled the shaft seal. Used the old seal as a seal driver. When putting the cover back on make sure the seal dont roll out. Take a mini screwdriver and tuck it in around shaft. Put bolts back in and tighten like instructions