I have the 140c and it came with a boat mount. I have an Outcast Fish Cat 8 pontoon boat (older model), which has the square metal frame tubing under the seat (if you have round tubing, then what I do won't work). The new boat mount won't fit right on that seat tubing under the seat, so I use an older boat mount from a Bottomline Fishin' Buddy that fits on the left side of the seat, just under the seat. It is out of the way for oaring and the stripping apron fits just right in front of it. The diameter of the older boat mount is not exactly right, so when rowing quickly, the 140c will start to rock unless I brace it in the holder with a towel or something. If I'm rowing a long way quickly, I just remove the 140c from the holder, which also reduces water resistance. Those boat mounts are made of hard plastic, but I found out the hard way that if you tighten up the screw too tightly, you can crack the plastic. I also have the Cabela's Fishin' Buddy Holster, and like it was pointed out, the strap does not adjust easily, but it works for float tubing better than anything else I've found once you get the strap adjusted right.