I first ran this engine in December 2006. *See Parts 1 & 2 of this video series.*
After about 1 hours total running time I read on the internet that some fellow ASP radial owners had experienced catastrophic failures of the connecting rods, resutling in sever damage to the engine. I decided to take my engine backplate off and insepct it. Sure enough, I found a linkpin that had broken. Fortunately for me I found it before the engine had gotten damaged.
I disassembled the entire engine. I sourced the needed spare parts, which are very difficult to obtain in the USA. A fellow modeler made a custom set of linkpins for me. And I set to polishing the entire engine. I have made several customized engines, and this was the biggest job so far!
As it happens sometimes, I got sidetracked on other projects and this engine sat in a box, in parts, for 2.5 years. In May of 2010, I decided to get it back together.
Here is the end result. A gorgeous looking ASP FS400 AR radial engine that runs perfect and sounds awesome. Peak RPM was 6800+, and idle was 1620. The prop is a light weight wood, Master Airscrew 18x10. The fuel was Powermaster 15%. Glow plugs are "Fox Miracle Plugs" 4-stroke plugs. The glow driver is a Microsens Glow5P.