Carb swapping

[Daddy Dom]

For the purposes of troubleshooting my Sport, is there any reason I can't swap my carbs over to see if the problem swaps cylinders too?
Thanks,
DD

[EVguru]

No reason at all why you can't swap carbs, but try swapping the ignition boxes first.

[Daddy Dom]

Hi Paul,
if you suggest this, I'm sure there's a good reason why to do the boxes first - but may I ask why? I'll explain:

My "workshop" is a narrow roadside and the traffic is very busy in the afternoons, which is typically when I am home to fix things. With no workbench, I am working out on the pavement and road with nowhere safe to rest the tank bar the top of a rubbish bin and if it starts raining as it frequently has been (it's winter here) I have to pack everything up completely. Horrible, cold, windy, squally rain that blows my manual and cable ties down the road. This week, I have been lucky to get one straight rain-free hour in. This is a royal pain.

Under these circumstances, a quick carb-swap is a far more achievable target. If I do the boxes first I have to take off the tank, swap the boxes/leads, then I only get to troubleshoot for as long as there is fuel in the float-bowls. If the problem doesn't present then the tank has to go back on so I can fill the carbs, tank off, then run it for a minute again. Ad infinitum.

Changing the carbs is a simpler job and I have more time to make an assessment.

Still, you can't beat the natural light in my workshop!

[Steve Brown]

Hi Dom,
Understand your reluctance due to workshop limitations, but I'm afraid I agree with Paul- i.e. most carb problems are in fact electrical-
Surely, if you are worried about where to put the tank, you could put your coat over the puddles, for the Queen. (wasn't that Raleigh?) and it's only a few minutes more work than the carb swap, which you'll end up doing anyway because you're already convinced that's the way to go.
To swap the carbs, without removing the tank, you'll at least need to pull the fuel pipes off. It only needs two more bolts removed and a rubber band pulled back to get the tank off, so not that much more to do, really.

Can't you con a mate into letting you shelter under their lean-to while you tinker? Scrounging help like that is very satisfying, I find. Good luck with it anyway, hope you get to the bottom of it soon,

Steve.

[Daddy Dom]

Well, I rearranged the side of the house and dragged the Morini into the courtyard at the back. One spark plug showed good sparking and the other not so. I swapped the boxes a couple of times and the problem followed so I've got two new ones on the way.
We'll see if that fixes the carbs.
Cheers,
DD