<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">This probably boarders on the "A/R" but generator and diesel engine exhausts are also prime candidates for "invasion" during long period being parked or stored..... </div></BLOCKQUOTE>
I suppose it's possible, but have not heard of it. Doesn't mean it never happens though.
I would think the exhaust pressure from an engine would clean things out quite well.