Topic: Pilot Jet Cleaning Help

[nobrake]

Hi

I am cleaning #40 pilot jet. I can see the light through the center hole but I also
see the hole is partially blocked half way down the tube. Is this by design or something
is actually stuck in the hole. I also check 3 other pilot jets and they all seem to have
similar blockages. Yes, I can see the light through all 4 pilot jets. Should I leave the tiny
blockage or try to yank them out?

[scunny]

that is how they are, the thru hole is smaller than the start

[nobrake]

Thank you.

It's hard to believe vacuum can suck fuel through such small hole.

[TwoTired]

The small hole is 0.4 mm or about 0.016 inch.  That's the metering orifice in the jet tube.

[nobrake]

Thanks.
I am amazed you guys have these infos. Certainly not in my service manual.