Thanks for the replies. Yes, oil was fine before I started it. I've ordered a new carb. Took the covers off to look at the valves. One of the springs had slipped too the side on the keyhole. Next step is to lap the valves in. Should I replace piston rings at the same time in case it is passing...
Hello.
I have a b+s 28d707 . Been sitting outside for a few years doing nothing. Tried to fire it up- fuel spat outside exhaust. Removed carb, cleaned float and looked to be ok. Fired up the engine. Ran great for 2 minutes. Then a mixture of oil and petrol came spouting in to the top of the...