>> He also said a method of dealing with
>> the carbon deposit is to steam clean
>> the engine while running, i.e. pour water
>> into the carburettor.
>
The method is widely known in Europe. In hot engine water and steam cause
heat shock, which "explodes" carbon deposits from combustion chamber,
piston and valves.
I think the risk is, that some of loosen deposits may stuck between valve
and seat, and valve may thus burn.
Run warm/hot engine faster than idle, about 2000 3000 rpm. Pour water
slowly to carb / carbs, I quess half to one cup (coffee-) water in about 10
seconds, maybe less is enough. If all goes well, pistons and head are as
clean as they wore washed with hot steam. :-)
I am sure someone has better and more detailed method than this, but she
maybe don't tell us.
Larry, Finland
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