T25 2L Aircooled - carburettor problems

[PhilBenton]

My T25 is losing power and smells as though it's running rich. When it's hot it won't tick over. Took off the engine cover to find a few things I don't understand.

There are wires on the By-pass cut off valve and the Fuel cut-off valve (linked) but no wire on the terminal on the Idling enrichment unit.

The connectors which should go to the idle stablizing unit are joined together.

The crankcase breather isn't connected to the pipe on the side of the air cleaner housing but goes over the engine and out through the bulkhead of the engine compartment.

The two small temperature regulator tubes that come side-by-side out of the aircleaner housing lid are joined together by a short piece of pipe.

and finally - there are two outlets from the vacuum unit on the distributor. There is a pipe from one of them to the right side carburettor. The other outlet has a short sealed-off piece of pipe on it.

Does anyone know if any, or all, of these things might be contributing to the problem please????? Quietly desperate...

[T25rc]

The vacuum unit on the distributer has one advance and one retard, the left hand side is advance i think, which should be connected to the vacuum pipe which runs from both carb's to each other. The retard one is to the carb - or that is how i understand it.

Mine also has the engine breather down past the engine and out to the exhaust, does it need to be recirculated?

The vacuum lines should be setup like this, anyway:

[PhilBenton]

Thanks - that's really helpful. Do you have an idle stablizing unit? - small black box on the left side bulkhead towards the back of the vehicle, just beside the electronic ignition unit. If you do, are there plugs connected to it?
Thanks again.

[PhilBenton]

Does anyone know a good mechanic in the London / South East who is really familiar with the T25 with 2 litre Aircooled engine. My local garage looked under the bonnet and declared themselves so unfamiliar with what they saw they didn't want to touch it. She's 1981 and only done 45k from new...