Series 2a 2.25 petrol struggling to start

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You could try running it from a jerry can, the fuel pick up pipe in the tank could be blocked. I bought an old Lightweight once that had been stood in a scrap yard for years, the very bottom of the tank was full of cr@p, luckily I could get my hand in the tank to clean it out through the filler opening as it was an under-seat filling tank.
 
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What are the plugs like immediately after you have tried a start? ie are they damp with fuel.
Does the exhaust smell of fuel when it has tried to start?
Is the carb to manifold /seal and manifold to head gasket good thinking sucking air from either.
 
Have you adjusted the air mixture screw at the base of the carb? The approximate correct adjustment is to tighten it up fully then turn it back about 1/12 to 2 full turns. If it then starts and runs, make a fine adjustment by tweaking it a fraction of a turn. When the engine runs at a fast tickover, then adjust the tick over setting on the linkage.

Col
 
I haven't touched the carb adjustments as was reluctant to change too many variables in one go while trying to start it. Il try the fuel straight in the carb again one last time. Cheers
 
When I bought my series 3, I couldn't get it to run properly and went through the things you have done, e.g. Changing electrical components. Eventually, I mucked about with the air screw and got it right. My clue was the plugs were black.

Col
 
Tried a tiny bit of easy start too, no luck either. I think il try the carb adjustment in the chance that someone before me might have moved it or adjusted it when trying to previously start.
 
Screw the idle screw in until it's just snug and offers resistance, don't over tighten. Then unscrew 1.5 turns and that should give you a decent starting point. I forget how the throttle should be set to give a reasonable idle speed
 
Cheers again for the advice, I have tried that with the adjustment screw and still nothing. I brought it out 1.5 turns then 2 and tried that. No further forward. New leads on too now.
 
It's worth trying to start tonight when it's dark. See if you can see any sparks jumping about, either from the distributor area, coil or any of the leads and plugs
 
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