N118SJ was restored to flight over the Covid break. This plane first flew in 1981 and had over 1300 hours when I retired it when my Defiant was flying in 2005. The restoration included a rebuilt O-200 to replace the C-90-8. The new engine uses a standard MS carburetor and has duel PMags. The engine runs very smoothly and has great power but sometimes when I'm in level cruising flight with low cruise power I get a very short hiccup every time I hit a bump in the air. Power is normal when the usual one g comes back. Very short period hiccups for which I have no explanation. I have examined the fuel system and found nothing dirty and the ignitions appear to be working just fine. I have not disassembled the carburetor to see if anything was contaminated. I'm hoping someone out there might have some idea about that is happening.
engine puzzle
in VariEze
Posted
N118SJ was restored to flight over the Covid break. This plane first flew in 1981 and had over 1300 hours when I retired it when my Defiant was flying in 2005. The restoration included a rebuilt O-200 to replace the C-90-8. The new engine uses a standard MS carburetor and has duel PMags. The engine runs very smoothly and has great power but sometimes when I'm in level cruising flight with low cruise power I get a very short hiccup every time I hit a bump in the air. Power is normal when the usual one g comes back. Very short period hiccups for which I have no explanation. I have examined the fuel system and found nothing dirty and the ignitions appear to be working just fine. I have not disassembled the carburetor to see if anything was contaminated. I'm hoping someone out there might have some idea about that is happening.
Steve