Hi Norm & Joel,
I just tried the blow by mouth idea on a carby that was giving me trouble. No sign of a fire in about 10 pulls, switch off the fuel, hook up the hose then blow through and she went second pull after that. Seemed to work but too early too tell. It was an old plastic needle. Its a nuisance that there is no way of telling if you have fuel in the carby or not.
I was thinking of a primer bulb from a chain saw or similar, has to be one that fits in a line not on the bottom of the carby. They are only about $1.50 but are not quite big enough in line diameter for the Victa line. For about $5.00 you can get the outboard motor style, probably too big. I wonder if you would feel the resistance when the needle valve closes like you do in a car or outboard. I think the Victa primers are a waste of space. I never could see how they are supposed to work.
All the best
Jeff