attleej Posted April 23, 2018 Share Posted April 23, 2018 Dear All, The J60 fitted to the REME museum's Conqueror ARV is poor at starting from cold but is fine in other respects. The position of the cold start lever on the carb has no effect. I have only managed to start it in the past by pumping the accelerator. When I strip the carb is there anything to watch for in respect of this fault? I will obviously give it a good blow out and check any available jets. Are there any diaphragms etc that I could change? John Quote Link to comment Share on other sites More sharing options...
terryb Posted April 24, 2018 Share Posted April 24, 2018 Hi John, cvrt's always wanted one pump of the throttle to start from cold-never needed to pull out the cold start lever-just make sure it idles ok when up to temp. Original cvrt install had the oil bath air filter so mixture was probably set lean to allow for the pull through the filter. best wishes Terry Quote Link to comment Share on other sites More sharing options...
Diana and Jackie Posted April 24, 2018 Share Posted April 24, 2018 There are three diaphragms, if you have the correct material (off eBay), some patience and a hole punch pliers they can be easily made, by copying the originals, at a huge saving in cost. Diana Quote Link to comment Share on other sites More sharing options...
attleej Posted April 24, 2018 Author Share Posted April 24, 2018 Dear Terry and Diana, Thank you for your help. All I have for an air filter is an after market gauze cone for a car. Thus probably not enough suction from the air filter. Since the engine runs for only short periods it is not worth fitting an oil bath. I could plumb it into one of the main engine air filters (and might do so) but that would not solve the suction problem. Does Diana know what material I should look for on Flea bay? It would be quite good to have some available for doing fuel pump diaphragms as well. John Quote Link to comment Share on other sites More sharing options...
Diana and Jackie Posted April 24, 2018 Share Posted April 24, 2018 The thickness is 0.3 mm. who the seller on eBay was I cannot remember. Sorry you'll have to do a bit of groundwork, it was around 6 or 8"" square, more than enough to make a few diaphragms. I suspect this will be too thin for fuel pumps as they are under considerable pressure and duty cycle. Diana Quote Link to comment Share on other sites More sharing options...
dgrev Posted April 24, 2018 Share Posted April 24, 2018 The best place to buy diaphragm rubber is "Fitch the Rubber Man" in Adelaide, South Australia. They are a specialist and can source some very obscure products. They mail world wide. They keep a few thicknesses on hand and I have personally seen 1m wide rolls of it! Nobody else even comes close to their prices, way way cheaper than ebay. Quote Link to comment Share on other sites More sharing options...
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