New o ring arrived in the post today ordered off ebay from sealsuppliesuk at the cost of £4.46 for 10 delivered so a bit of a bargain. Took 5 mins to fit and she fired up first time. Took a short trip out and all seems fine now,runs really smooth so thanks T-Cut and SD1too for your help
. The size I bought are 80mm inside diameter and 2mm cross section.
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