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Gas Tester

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I've picked up one of these gas testers second hand. Cool little device and easy to use. Does anyone have any idea what level of Carbon Monoxide a red engine should be making? I know the legal limit in the UK is 4.5%, is there a published figure for red motors? After some adjustments of the idle screw and jet I'm producing 1.5% at idle and just on 3.0% at 3000 rpm which I reckon is pretty good. Car runs much nicer too.

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Will be pot luck if its calibrated, there generally a reason stuff like that makes it onto the second hand market. Most of the older stuff is too expensive to repair/recal.
Might be good enough for what you want though, be good if you could test it on a vehicle with known readings.

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I think it's pretty accurate. You calibrate it each time before you use it by sampling a fresh air level.

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Dave H - Sydney
[http://gallery.oldho...|My Shed] - 1963 EJ Special - Ti Tree Green

yes, they still need to be calibrated though, its a bit more in depth than just worrying about carbon monoxide too, you may achieve a low Co reading but you may inadvertently alter the Nox and co2 output to a level that will result in a nasty letter from the EPA.

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They have been around a long time see http://www.gunson.co... designed for home use and easy calibration.

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Regards Blue

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