
Originally Posted by
duskylim
Dear Sirs:
The jury is definitely out on the preferred method of carb cleaning.
That said, some brands of spray on carb cleaner even specify in the instructions to spray the carb while the engine is running.
In my opinion, spraying while the engine is running is the easy way out.
The ideal situation would be to dismantle the carb and clean it out piece-by-piece.
However, that involves a major carb overhaul and is both time-consuming and more expensive.
Spraying when the engine is running definitely helps the cleaning process because the high-speed airflow carries the carb cleaner along with it and thus helps to wash out and loosen deposits and dirt.
Also because the air flows over those parts that are exposed to its' flow (and thus are the dirtiest) you are cleaning the parts that need it the most.
Its definitely superior to the alternative - spraying with the engine off.
The dirt will be loosened a little but the airflow just makes cleaning more effective.
The only downside is that the dissolved and loosened dirt is sent straight into the engine.
Just my 2 cents.
Best Regards,
Dusky Lim