This is my first how-to video that documents the repair effort of my Craftsman lawn tractor with a Briggs and Stratton Intek V-Twin 21 HP engine. The engine began emitting a loud tapping sound from under the rocker cover. Soon thereafter, it began running unevenly as if one cylinder was no longer firing. This video reviews the diagnostic and repair procedure to replace the bent push rods and cylinder heads. It also covers adjusting the valve clearance and has some tips and advice to help avoid this problem on your air-cooled engines. Please feel free to leave comments on how I can improve for future videos. I consider myself handy, so if you would like to see other repair videos, let me know and I can see what I can do. Please like my video if it provided valuable information for you.
Thanks to Foxboss9 and his instructional video: https://youtu.be/HIfAp2DDX-M
I also found this link from TechSupport Forum which explained the problem as well: https://goo.gl/X357XF
I purchased the parts from Amazon to get two-day shipping. If you can wait and prices are comparable, buy from your local small business to help support them. Here are the links to Amazon for the parts specific to my engine:
Briggs & Stratton 796231 Cylinder Head: https://amzn.to/1CQOpu0
Briggs & Stratton 796232 Cylinder Head: https://amzn.to/1IeeQpg
Genuine Briggs & Stratton 690981 Steel & 690982 Aluminum Push Rod Set OEM: https://a.co/fM2eN6c