Hi all Just got myself a sb 45 to restore as a hobby...Its got the Kirby 3 hp engine which i have managed to get running but is leaking fuel from under the carb..(any ideas)can you get the parts?.The frame has also been welded at the front engine mount.Prob not the best job..Also one of the drive chains is broken..Am i wasting my time and should i buy a better one or it all repairable .Does anyone know what the model/nos mean Many thanks Alan