Hi Guys

i had sudden unstable rpm and sudden stall on low rpm on my b310 and rarely a misfire only at once ,noticed that contact point on it so had some burned marks on it, Sanded them and cleaned them and set gap again and re gaped the spark plugs too, after that started runs poorly it is like starting and stopping again running ,so cleaned all the terminals of battery too, did not work, it starts but 3 to f cranks will take it start, so checked distributor timing it was advanced , set it to zero it was better but not usual so set it to retard then it is fine starting on first turn , looks ok on running is it ok to have it retard ?

thanks
regards
sumith