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Zenith 22 FZ Slow Running Tube Lock Screw

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Zenith 22 FZ Slow Running Tube Lock Screw
Steve Jones Offline
Pass the hammer
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Joined: Aug 2017 Posts: 1,400 Threads: 25
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Location: North Yorkshire
#1
22-08-2023, 04:02 PM
A friend has lost, on the road, the locking screw that holds the slow running tube in place on his updraft bronze Zenith and he's trying to find out what thread it has so he can source a replacement. Mine is M4 but I don't know if it's been messed about with in the past. The locking screw on  mine is certainly a brass original and metric threads turn up on Zenith carbs sometimes so, maybe M4 is correct. If it isn't, it's certainly something very close to M4. 2BA has been suggested but that's too big.

Anybody got a definitive answer?

Steve
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Zenith 22 FZ Slow Running Tube Lock Screw - by Steve Jones - 22-08-2023, 04:02 PM

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