- Nov 26, 2006
- 7,628
- Boat Info
- 2008 44 Sedan Bridge
- Engines
- Cummins QSC-500's
Straight Drives
Has anyone installed rod holders in the gunwals of a 320. I was intrested in putting a couple in and wanted to get some measurments from anyone that has them already installed so when I drill there will be no worries.
I did this on my 340. I used my friend's 320 as a guide. His were canted out 45 degrees. I couldn't understand why until I drilled mine. In the back section of the gunwales, there are the vents for the engine room. To keep water out of the ER, air goes into the vent, then up over a barrier, then down to a center section which has drain tubes to drain mist and splash, then up over a barrier and into the ER.
On my 340, I decided where I wanted them fore/aft, then measured from the gw sides to determine how to center them up on the non-skid surface from below to make sure the area was clear. The plastic barriers (see above) were in the way, but they are flexible. I made my best guess, then drilled a small hole from above - angle this hole aft about 30 degrees (like a fishing rod). The thickness of my gw tops change in that area, so I drilled so that the entire hole would be in the thick region. I then evaluated the position of the actual center of the proposed hole and was happy.
So, I placed the rod holder upside down on the gw to determine the entry angle for the hole. I then took an appropriately sized hole saw and placed the guide bit in the pre-drilled hole. The guide bit was not long enough to achieve the desired angle, so I angled it as much as practical without allowing room for the guide bit to jump out and the whole hole saw to go digging a ditch across the top of the boat.
Going slowly, I began to cut the aft portion of the hole (drill angled aft). Realize that at this angle, the hole saw will bottom out before you get through your gw. I had to back it out, chisel out the area, then drill again. Once I got all the way through, I trial-fit the rod holder. I bent the plastic barrier out of the way, but it kept rotating the rod holder as previously described. Additionally, the hole was not angled aft enough. Now that the hole was started, I was able use the big hole as a guide to angle it even more.
Once I got the big hole drilled in at the right angle (so the rod holder flange would sit flat), I inserted it and, once again, the barrier/divider tried to angle it out. I came up with a compromise angle that have my rod holders angling out about 15 degrees from straight aft. I had to hold them forcibly in the right position until I could mark the holes to pre-drill the screw holes for the rh flanges. I drilled those, re-inserted the rh and held the rh in position, added 4200 sealant on the screws and around the hole and under the flange, then screwed them in position. I've learned that when pre-drilling holes in fiberglass, drill larger than the shank and, obviously, smaller than the threads. With wood, you can drill small. With fiberglass, you can't. It will either not give and you will break the screw or it will crack or chip away the fiberglass.
They sit flush with a small amount of sealant filling the gaps in the diamonds of the non-slip surface - it is not noticeable. I am very, very happy with the installation.
On the 320, the dividing barriers may be closer together which may dictate more of an angle out like my buddy's 320.
Good luck.