I see on ebay there are replacement carbs for models 30 and later is there a replacement carb for the 25A?The problem is that when I do manage to get it to start it will only run for a few seconds. I think I have solved most of the problems but the carburetor is still causing me problems. I have been given a mower engine which I think is a Suffolk Super Colt (75G14-25A), I have spent many hours trying to get it to run.