A leaf blower may be too much.
Seriously, don't do it.
If you're gonna do it anyway, jet the carb as rich as you can get it. You shouldn't need more than high idle on the leaf blower.
Check to see if the gas tank is vented at the carb, if it isn't, you may have to pressurize the gas tank with the blower.
I doubt that you're gonna set up an air/fuel gauge on it, so if the mower doesn't black smoke a little, assume it's too lean. Try to find a cooler heat range spark plug for it.
Contents under extreme pressure,
Aim away from face.
Keep out of reach of childen.
Do not turn upside down.
If irritation persists, discontinue use immediatly.
Do not try this at home.
Or any place else.
Really.
[This message has been edited by Pontiaddict (edited 06-08-2002).]