When was the last time you have waxed the bottom of the boat,you can lose about that much with a dirty hull. Also Warmer water will slow a boat down alittle in the summer time. I lose about a 100 rpms in the summer.

| Search Fishin.com |
When was the last time you have waxed the bottom of the boat,you can lose about that much with a dirty hull. Also Warmer water will slow a boat down alittle in the summer time. I lose about a 100 rpms in the summer.
