1991 12.5 Tecumseh OHV 143.426172
There doesn't seem to be munch info, or many repair videos on this engine. The Flat Head / L Head engines seem more popular than the OHV version. But when I needed to replace the head gasket, I had to learn how to remove the valve springs and the rocker arm housing. I couldn't find any videos about this, so I decided to make my own! I give the "how to" guys a lot of credit, because it is NOT easy to make a "how to" video! You can tell, I'm more of a vlogger than a "how to" guy. One of the bigger challenges was the fact that I needed to make a tool to remove the Valve Keepers, so I tried to give a full demonstration on how that tool works.
Here's a link to the engine parts:
www.partstree.com/models/143-...
Here's a concise video on how to adjust the valve clearance on this engine:
• Tecumseh OHV valve adj...
00:00 Intro
05:02 Installing the head gasket, head, and rocker arm housing
09:39 Demonstrating how I first removed the Vlave Springs and Keepers
11:21 Trying to repeat my first method (fail)
11:49 Modified tool (homemade valve compression tool)
12:14 Installing a valve spring and keepers (spring upside down)
13:35 Uninstalling a valve spring and keepers
14:15 Installing a valve spring and keepers (again...correctly)
15:09 Installing the second valve spring and keepers
16:21 Fully assembled rocker arms (showing the compression release)