Caution. Jets are extremely precise little devices. Even a very tiny
scratch inside will change its performance in a negative way. My basic
rule is that if someone has inserted anything such as a guitar string or
whatever into a jet at any time in an effort to unplug it, the jet is
effectively ruined and should be replaced. If you need anything beyond
solvent and compressed air to clean it, the jet is done. The only
exception is if you are stranded somewhere and need to get home to
replace the jet upon arrival. :-)
Bill Bina
On 8/20/2013 10:15 AM, Josh Muckley wrote:
If you are trying to clean the jets, you may find that the solvent is
making it through the jet but is probably not fully cleaning them.
I use a set of welding torch cleaning files to clean the jets. Start
small and work up. Mine was completely clogged shut. I had to be
careful to feel for a change in the filing resistance as I went up in
size.
The jet I pointed out in the video is just for idle fuel mix. Almost
all carbs have something like it. When it gets clogged up the engine
starts to die causing the governor to open the butterfly. This sucks
large surge of fuel through the main jets which momentarily over
speeds the engine. And the cycle repeats....
Choking the engine reduces the airflow which helps reduce the surge of
fuel. If choked just right the perfect amount of fuel is sipped in
through the main jet and the butterfly is held just slightly open by
the governor. Now problems will occur when you go to full throttle
because the engine is partially choked and not getting enough air.
Josh
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