42 with 700s prop question
 

Wondering what others running this setup (17 X 37.5 Herings) are using for spare props. Will 5 blade Mercs work? The water is so low this year I feel I should have a spare set in case mine need to ship to the west coast for repairs. Also, this boat is new to me and has no vent tubes. I have heard no problem from some and must have from others. Any thoughts?