I did up my Orange Power torque and mowed some oarsome lawns..........
Anyway sunday she made a big bang and smoke came out under head.......I cleaned it off prior to pulling it apart and found a 3cm piece of head gasket.
Thought I would check the head with some 400 wet and dry sandpaper , on a piece of glass, kitchen window. It ground down very quickly so there was not any big warp.
Put it together and mowed the front lawn, then it seemed tp loose power, but I could get it back by riggling throttle, so it's the carby.
Changed the carby with 2 new o rings on manifold. . It kicked a bit bt now it's a pain in the A frame.......
I have ordered a few of those carby primer bulbs , and i will fit new ones....
I should have used a proper socket handle to tighten head bolts.....
It needed o rings as they were stuffed, so it's progress.

You just need heaps of spares to try out.................
speedy
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........................Keep your blades sharp......................