Fixing a couple leaf blowers - Walbro carb issues
I am working on a couple hand held blowers (one craftsman and one Poulan pro BVM200 type 1 both of which are identical since Poulan made the craftsman line of power equipment or did when this blower was made) and also working on one Weedeater brand Featherlight FL1500 blower. I know that in all three cases, the problem is fuel related.
The poulan I have rebuilt the carburetor on (Walbro WA-229, same one on the craftsman) and I have a kit for the craftsman one as well. I also rebuilt the carb on the weed eater blower. The weed eater blower will run after I prime it. It will only run for a minute or two before stalling and wont run again until you prime it again. When you push the prime bulb, no matter how many times you push it you still see some air bubbles pushed into the return line. I see that the carb is wet but i dont see any visible leaks. The fuel lines are new and there are no leaks between the filter at the end of the line and the carb. I think it may have an air leak around the primer bulb but i'm not sure. The bulb itself is dry.
The poulan I know is leaking around the primer bulb and that is probably its problem too. I just put kits on both of those carbs (Walbro WT-557 on the weed eater) and i am sure that I didnt do that wrong. I can rebuilt a vehicle carburetor and they are much more complicated so I dont think its something I am doing wrong but I do find it odd that both of them seem to be suffering from the same problem. I think for some reason they are leaking between the carb and the bowl where they meet at under the metal retainer. Does the primer bulb need to be replaced like a gasket every time its removed?