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Overtight Keyster Airscrews!

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Andrew-S:
Well, after Nigel's (K2-K6) visit a few weeks ago we managed to get my K1 firing on all four pots, although No1 wasn’t firing consistently which turned out to be debris in the pilot jet. But after trying to wind out the Keyster air screws we found they were so tight (all but one wouldn’t budge) the heads just started to chew up and No3 snapped half its head off; they were turned out about one turn and hadn't been set by a gorilla either!  I know they are an interference fit, but..............

I'll be putting a micrometer on the threads and I'm pretty sure they'll be oversized.

Has anyone else come across this issue with Kester air screws?

Anyway, now I've got some free time (an oxymoron for a retiree I know! ::)), the carbs will come off again tomorrow to extract the screws and refit the originals.

Cheers,
Andrew

McCabe-Thiele (Ted):
I know the feeling about being a retiree - I can't figure out how I ever had time to go to work - plus my whole week will be messed up by a mid-week,   mid-day dental appointment.

One thing for sure you will be getting highly skilled in the carb removal process - sounds like you are getting there in sorting the issue.

Moorey:
 Someone could have put a drop of Studfast on them in the past. When the carbs are stripped try some heat to break the bond.

Andrew-S:
Ted,

Yes, I'm getting into the swing of taking these things off. In fact when I put them back on I'll fix them on with Velcro!

Moorey,

I've tried heat and shock but the brass is so soft the screwdriver just chews it up, so screw extractor time.

Johnny4428:
Sometimes I’ll nip to the workshop even for half an hour simply because I’ve just about wasted every other hour that day! Note to self - sooner you get the mundane jobs done,the sooner you can get on to the exciting stuff!
That air screws look a right delight to work with Andrew!😡

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