ChrisR-4A Posted October 2, 2019 Report Share Posted October 2, 2019 (edited) Hi all, I fitted two new Diaphragms to my CD 175s in 2015 . The carbs are in good condition as were bought as NOS in 2004. Since 2015 they have done nearly 15000 miles and following a spate of erratic tic over investigation found the rear diaphragm had a small 8mm vertical split. The front one was the same but while removing the front one it virtually fell apart. So the question is how long should they last, how long did yours last. Thanks, Chris Edited October 2, 2019 by ChrisR-4A Added info Quote Link to post Share on other sites
stillp Posted October 2, 2019 Report Share Posted October 2, 2019 The ones in my car are something over 25 years old, and have been removed when I bought replacements, only to find that the replacements didn't fit, so the old ones were retrieved from the bin and refitted. Can't remember where they came from. Pete Quote Link to post Share on other sites
John Morrison Posted October 2, 2019 Report Share Posted October 2, 2019 Chris, something like 20 yrs or so, without issue. John. Quote Link to post Share on other sites
Nigel Triumph Posted October 2, 2019 Report Share Posted October 2, 2019 I fitted new diaphragms to the CDSE150s on my GT6 18 years ago. Still fine now. Nigel Quote Link to post Share on other sites
ChrisR-4A Posted October 4, 2019 Author Report Share Posted October 4, 2019 Hi Guys, I just fitted two new ones which are a perfect fit, came next day first class post from Moss and were only slightly more expensive than the ones I bought 5 years ago from a smaller London shop. What surprised me was how well the car was running with the damaged ones fitted, it still accelerated well up to 3ooo-4ooo rpm, I don't use much more very often and cruised at 65-70. Only the uneven tickover made me think something was wrong. I hope the new ones last longer than 5 years but if they do last 15-20 years that will be for someone else to discover. !! Quote Link to post Share on other sites
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