I have a SC52FS which I've been running for a couple of years (probably about 20 flights) with no problem. I've now come out of my shell, as the weather's got warmer, and I now find I have a sick engine.
It starts perfectly and idles smoothly at around 1,200. However, when I open the throttle the speed only increases to around 3,900 no matter the main throttle setting.
I've cleaned out the tank and filter, renewed the piping, cleaned the main jet and the silencer nipple. I've been assuming that as the low speed is OK that I haven't got a leak around the carb, but I haven't investigated further.
I've never taken an engine apart before so I don't want to go that far until I've investigated all other options, so, any suggestions please?
Edited By Barrie Galley on 18/06/2018 16:59:10