anyone no which way to turn it to richen it up is it anti clockwise or clockwise on a RST

 

Cloclwise to increase CO%, anti-clockwise to decrease CO%.

Make sure you have the pressure actuator disconnected when setting the CO.

 

clockwise.

 

is that the black plug on the side of the metering unit ?

 

Cant remember the colour of the plug to be honest, there are only two electrical connections on the metering unit (pressure actuator and air flow pot), its the one closest to the wing/fuel filter.

 

cool i know the one cheers buddy

 

cool, I need to do this as well, my CO2 was only 0.5 when it went for the MOT.

I've got one of those useful metering heads, as soon as you take the plate off to adjust it it cuts out...

 

They all do that by design pal
The filler cap and dipstick should do the same thing to it if its working well

 

No I just meant all others that I've seen have got an extra piece on it that lets you adjust it without it trying to cut out...?

 

Ahhh.. know what ya mean now

Thats a later revision

 

Any ideas on this one Stu...

1989 ERST, Idle speed started dropping - after a run it would idle ok for about 30seconds, then the idle speed would just drop off and sometimes stall (had to keep foot on accelerator to keep revs up).

Checked CO at work, CO was at 7% - i corrected CO and it seemed to have sorted the problem.
About a week later the same happned again, rechecked the CO and it was up to 7% again (engine warm).

Removed and cleaned the control lunger in the metering unit, it did not appear to be sticking, the air sensing flap is not binding either.

I reset the CO again but after a period of time it will self increase to around 7% and the idle will drop.

Any ideas/advice??