My P5 has had a manual choke fitted sometime in its past. It works well and the engine always starts first time from cold. The only problem is that as soon as you release the choke control it retracts and the engine cuts out so you have keep hold of the control and gradually allow it to retract as the engine warms up. I am looking for a solution or mod to remedy this. My 'high tech' solution at present is to use a wooden clothes peg to grip the shaft behind the control knob to stop it retracting. I'm sure there must be a more elegant solution !
I thought of fitting a spring on the shaft behind the control knob but the control knob doesn't come off; it seems to be integral to the bowden cable. Do other have the same problem or is there a known solution ?
Most owners changed from auto-choke to manual. The seller I purchased my car from had included the original parts in a pack and I asked burlen.co.uk/ if they could re-assemble and restore. They said they would do so but it would be expensive - meanwhile they can supply a new one (which they said works!) cheaper than the repair. In my manual system I found it difficult to turn clockwise to hold it on which I think is your experience. Wooden clothes pegs are better than the rounded plastic variety!
I didn't realise that the clothes peg was such an integral part of the P5 scene. I just bought my car in December and it came fully equipped with 2 wooden pegs ! Two is good as you can release the choke one peg at a time.
An older Brit here in the US explained to me how the choke holding device worked on his Riley RME. "First you go to the fag store" he said, "and you pick up a small matchbox of matches. There are 6 sides to it, with 3 different lengths or widths. Long way is for startup, crossways is halfway down the road, and on the end for the last bit before forgetting about it for the rest of the day." I tried it and the choke worked fine ever since.
Mike, hi, First: I assume you do know that the correct operation is to pull the choke out, then twist it 45degrees or 90degrees and that should secure it. To release it you un-twist the 45degrees or 90 and let it back in... Or twist again at a lesser amount. Assuming this has been tried and will not work... It could be the the previous owner was pushing and pulling whilst it was twisted, that wears out the metal. This can be overcome by "very carefully" squeezing the tube behind the pull handle using a small pair of mole-grips. You need to ensure you are squeezing the right angle/side. I successfully re-set mine a few years back and its been fine since.
Thanks for that Ray. No it doesn't latch when the handle is twisted. The previous owner gave me the training course on using the wooden pegs so either he caused the problem without realising or it was an owner prior to him. I will try your suggestion 'carefully'.