Keith M Posted January 27, 2021 Author Report Share Posted January 27, 2021 Correct. Transpires I had unknowingly reused a balast coil that was on the car when I first aqured it from auction as a restoration project. Its not been on the road since 1981. Link to comment Share on other sites More sharing options...
Keith M Posted February 6, 2021 Author Report Share Posted February 6, 2021 So today I have replaced the coil and cleaned out the carb which was, as suggested, full of rubber bits. It is running much better now. I need to re-adjust the fuel mixture as it will not stay running without being on full choke. Then I noticed it was dripping fuel from the float chamber again. This is a Stromberg CD150 with the mixture adjusted from below. So I pulled the carb off again, for the umpteenth time, and discovered that I had yet again split the float chamber O ring. I am not convinced that the previous one I fitted was the correct size. It did not grip the bushing screw as I would have expected it to, but it did not leak to begin with. Hunting around the interweb, I can not find a definitive answer to what the part number is or, the size of the O ring. I'm assuming it is an imperial size? Can anyone tell me what size this O ring is so I can get in a small supply of spares? Link to comment Share on other sites More sharing options...
Colin Lindsay Posted February 6, 2021 Report Share Posted February 6, 2021 https://www.ebay.co.uk/itm/Triumph-STAG-Etc-PAIR-CARB-NEEDLE-O-RING-Stromberg-CD175-CD150-carburettor/292163654668?hash=item44064f940c:g:nrYAAOSwnHZYfNuF It's listed here as Triumph part number 512317, and I've also found it as 512311, but the Stromberg part number seems to be 019658. This is a USA site but handy for identifying the parts you need, then sourcing them locally: https://classiccarbs.com.au/Classic-Carburettors/Carburettor-Overhaul-Kits-and-Parts-listed-by-manufacturer-/CD-Stromberg-ZENITH-CD-Carburettor-Rebuild-Kits-Zenith-CD-Rebuild-Kits-Diaphragms-Needle-Seats-Parts-Jets-Shafts-Gaskets/Stromberg-CD-Parts-Stromberg-CD-Parts-Zenith-CD-Parts-CD-Stromberg-carburettor-parts-CD-Zenith-carburettor-parts-175CD-carburettor-parts-150CD-carburettor-parts-125CD-carburettor-parts- Link to comment Share on other sites More sharing options...
Keith M Posted February 6, 2021 Author Report Share Posted February 6, 2021 Thanks Colin. Looks like it is 512311. That site confirms the O ring is the same as the one used for the float chamber plug on the CD175 used on the Stag, so I've ordered a few to use on both cars. Hell of a price difference between suppliers though. Link to comment Share on other sites More sharing options...
Colin Lindsay Posted February 7, 2021 Report Share Posted February 7, 2021 15 hours ago, Keith M said: Hell of a price difference between suppliers though. You will find that!! Most of the parts come from exactly the same source, too. Link to comment Share on other sites More sharing options...
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