Planning first voyage

[Rattlesnake Guy]

Question about blowers. (Proof it's never too late to be a newbie)

When the engine is running, is the air being consumed and exhausted by the engine generally taken from the engine compartment? Does this consumption act to keep the engine compartment LEL (Lower explosive level) in check as the blower would do if on?

Gasoline needs to reach a concentration by volume of between 1.4% and a max of 7.4% to be explosive.