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CARB ; CHOKE ADJUSTMENT

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WARNING

TAKE CARE WHEN WORKING WITH PETROL ;  USE COMMON SENSE AND IF YOU FEEL IT IS BEYOND YOUR CAPABILITIES

THEN PLEASE SEEK COMPETENT HELP

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SET THE CHOKE GAP

SU CARB showing CHOKE SETUP & BREATHER TUBE


Stick the choke cable back on carb and fit through clamping screw BUT do not tighten screw at this point.

Get feeler gauges and set for 40 thou .

Measure the gap between the screw underneath the choke arm and the lever and adjust so that it is a nice sliding fit { take care that the feeler gauges are 90 degrees to the arm or you will get a false reading }

Tighten up locking screw on choke cable .

Recheck gap .

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Refit the air filter assembly .

Because you have refitted the air filter assembly you will have to fine tune the mixture just a little .

Restart engine { you should be able to start it without putting your feet anywhere near the throttle } and once again using the end of the rubber hose , just screw the throttle adjuster screw in till you get a very FAST tickover .

Try weakening the mixture by one flat and see if it runs slightly faster / smoother .

If it does , then leave it there .

If not then reset back one flat and try one flat the other way

It should not be far away from your original marker { probably ¼ to half a flat weaker required }

Get a helper to sit in the car and press the clutch pedal right down and you can now reset tickover so that with the clutch depressed it is still ticking over nicely . 

You can also check the mixture if your carb has a lifting pin as per the following link ;

http://www.gowerlee.dircon.co.uk/Tips.htm

STOP engine .

Mark the flat on the bottom adjuster nut with a different colour marker , and you will be able to fine tune or put it back to the same spot .

NOTE ; You will have to wait till the engine is stone cold to try out the choke .

All you should need to do is pull out the choke fully and turn the key without touching the throttle with your foot .

Remember to have a fire extinguisher handy when working with petrol 
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