My mini potato gun/spitball gun wont work!

I have made a mini potato gun and at first it was working but it doesnt seem to be working. I spray into the gun then when i go to shoot it it doesn't work.

There is a spark and I'm definitely spraying enough aerosol so that shouldnt be the problem.

Im not sure what im doing wrong, can anyone help or make any suggestions ?

caarntedd7 years ago
Too much fuel, not enough air. Start with a small amount. Work your way up.
jcosi97 (author)  caarntedd7 years ago
hey thanks :)
but what exactly do you mean by start with a small amount. Work your way up.
Start with a small amount of aerosol. Try to fire it. Try a larger amount. Try to fire it. etc. etc. Until it fires, then you will know exactly how much aerosol is required. Too much aerosol won't work as the air/fuel ratio is too rich. You need the exact amount. Experiment. If this doesn't work and you definitely have spark, then the chamber is probably not air tight anymore.
jcosi97 (author)  caarntedd7 years ago
okay, thanks very much
explained very well :)