Air Filter Cartridge

Install carb & air filter

Replaced the air filter as I do annually. Simple maintenance! The primer bulb was cracked after 12 years of use and making starting/restarting difficult, and replaced it. Had to remove the bulb housing assembly from carb to make the repair. Piece of cake. Wing knob was worn from the rope rubbing on it, my fault for not noticing. Easy replacement!

Replaced old with new,started right up.

Replace air filter.

Removed the filter cover,remove the foam filter and the filter cartridge and replaces them.
Removed the blade bolt, washer, accelerator blade and the main blade. Installed the new blade, the new accelerator blade, washer, then tightened the blade bolt.

Removed the air filter cover and removed the old filters
Installed the new filter and replace the cover
Remove the old spark plug and gapped the new one at 0.020

Self propel drive system failing,..belt guard deteriorated and rusted,...drive pulley encrusted with debris, causing belt to slip off. That issue caused me to think drive cable was faulty. Not true, I now have spare. Engine surging, and air filter in poor condition. Actually I adjusted the gov. spring and issue continued. Found governor at engine attachment point under engine housing very dirty and gummy preventing smooth operation,..cleaned with parts cleaner and inspected entire area,... reassembled and surge problem was gone without filter and foam replacement. Filter and foam replaced anyway. Kept old filter and foam after detail cleaning for spares. Replaced belt guard after complete cleaning. Drive system now operating as advertised. Additional and routine cleaning of enclosed belt housing will be necessary due to age and overall condition of mower deck blade area. Ordered parts I thought were needed prior to detailed troubleshooting as indicated here. Will continue to used old parts and now new spares are an immediate backup.
Very happy with parts availability for 16 year old walk behind, RWD , self propelled mower.

Removed air cleaner assembly from carburetor
Replaced primer
Cleaned off old gasket
Replaced with new gasket, used a mix of graphite and oil as sealant
Installed new filter and housing
Added gas, no leaks, pumped primer and started engine.

Stripped lawnmower down to clean and repair. Painted deck and repaired drive system. All parts fit perfect.

Tripped head off, inspected all parts, cleaned carburetor bowl while I had it off the engine.
I checked to make sure head and cylinder surface wasn't warped, de-carboned piston top and head. Re-assembled.
This type of repair is pretty straight forward.
If your new to this, keep nuts and bolts organized, and it goes easy!!