-NO- it sucks in from the bottom of the lower unit runs through the sea pump through the exchange and out the exaust
It is really non fo your consern
Does this fuse "blow" only when turn signal is activated? one side? or both sides? If the fuse blows only when activated on one side remove the light sockets on that side to see if fixture is damaged (water or mechanical) or "shorted" to ground, check and replace bulbs on that side (sometimes although rarely they can short internally). If fuse blows when turn signal is activated on both sides, possibly a "short to ground" circuit in the steering column. Could also be a shorted turn signal flasher, but again rare.