I have a 12' tunnel hull with a 40 hp Nissan. What size cleaver prop do I need to run for best results? I'm new to the boating thing and don't know many people around with many speed boats any info would be appreciated thanks.Click image for larger version. 

Name:	FB_IMG_1438095450478.jpg 
Views:	115 
Size:	78.3 KB 
ID:	324413Click image for larger version. 

Name:	FB_IMG_1438095424543.jpg 
Views:	89 
Size:	47.2 KB 
ID:	324414