Loss of power once warm?

[Robin Anderson]

One of my Silver Century Plus birds hit a floating timber at full speed - memo to self - hire a more competent pilot next trip...... The awesome power available broke the drive spring and the beast raced without drive before I could tame her.
Since then she will start on first pull and run perfectly slow and fast - until after about 10 mins when she looses power above quarter throttle. Ticks over fine but when opened up it is as if the high speed jet is blocked. Jets are fine so am thinking perhaps piston rings knackered - unburnt fuel seems to be going out the exhaust once hot.
What does the panel think?
Robin

[headdownarseup]

Time for a strip down and closer examination me-thinks.

A quick clean of the carb and fuel system might help a lot.

Take things one step at a time and you'll get to the bottom of things pretty quickly i'm sure

Jon

[Robin Anderson]

Ta Jon, yes I think a dismantling is due. Jets have been cleaned, timing fine, filters etc so must set to with bigger spanners.....