On Thu, 8 Oct 2015 17:31:48 +0100, newshound
wrote:

I would also remove the float chamber from the carburettor and clean it
out (it may or may not be easier to remove the carburettor first). What
happens in 2 strokes is that the petrol in the carb evaporates, leaving
the two stroke oil behind as a sticky residue. As someone else
suggested, may be worth cleaning the main jet too.

Check you-tube if you have never stripped a carb before, they are quite
simple but when you remove the float, the spindle and the needle valve
will drop out and disappear if you do it the wrong way.

My other favourite technique with recalcitrant engines is to warm up the
carb with a hot air gun or a gas torch. Try not to melt the fuel pipe,
but it is safe to get them quite warm to the touch (they get warm by
conduction from the cylinder barrel in operation). Also OK to heat up
the plug (removed) in an oven or with a gas torch. You can make this too
hot to touch without gloves.

It is this type of generator:
https://www.machinemart.co.uk/shop/p...generator-g720

(not meant as an endorsement of machinemart because we all know of
their poor customer service!)

I don't know how easy it will be to take apart, being a cheap thing,
I'm not sure if they are meant to be stripped and serviced or whether
they are seen as disposable, but I'll certainly have a go and might
learn something in the process.

Thanks,
Stephen.