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Questions about a couple installs for my 2017 170 Montauk.
I purchased a pair of BW aft seats from a private party for my 2017 170 Montauk and I wish to install them myself. I found the measurements to install it in the document ‘170-Montauk-Hull-Outfit-2012’ on the BW site under owner resources. The locations of the brackets are reinforced with 3/8” phenolic per the Reinforcement Location Diagram in my 2017 Montauk manual. The reinforcement diagram suggests ‘Drill & Tap’ as the hole preparation. The supplied screws are rough threaded and longer than 3/8”. I assume this means I am to drill and tap a through hole rather than a blind hole which would require shorter screws. Please confirm.
These are the steps I’d plan to follow:
1. Rough mark the locations of the brackets and cover with painters tape
2. Measure and mark the locations of the brackets using the diagram in the Hull Outfit document
3. Place the brackets on the marks and mark the hole locations for the screws. Also mark the slots to do a ‘rough check’ with the actual seat bracket placed against the marks.
4. ‘Rough check’ the bracket locations with the seat itself (brackets and pegs line up at top, seat should be level when bottom peg aligned with bracket location, seat is appropriate distance from gunnel, etc.)
5. Drill the holes with the appropriate bit (85% of major diameter of coarse threaded screw). Using a drill guide.
6. Tap holes with appropriate tap. Using a tap guide.
7. Bevel the top of the hole with a countersink bit
8. Apply marine sealant to threads and hole and screw in bracketd
9. Clean excess sealant with acetone
10. Mount chairs
Missing any steps, or did I get any wrong? Would it be better to drill through the brackets, maybe even mounting a single screw in the first corner vs drilling marked locations on tape? Should I be drilling a pilot hole (the screws are pretty small)? Should I be beveling / countersinking first and then drilling?
I also need to install a bow cushion I purchased from Sue at Beacon. The cushion has 8 snaps on it. There are female snaps mounted to nylon straps similar to the ones on the back of my console seat. The nylon straps indicate that I won’t need to be super fussy about getting the snap locations exact perfect as there will be some available play. For these I found no diagram to locate the locations of the snaps at whaler’s site.
These are the steps I’d plan to follow:
1. Measure distance between snap locations (at least two points each)
2. Rough mark the snap locations on the deck and cover with painters tape
3. Set the cushion in place
4. Slide a piece of paper under each snap location over the painters tape
5. Apply a marking agent to each of the female snaps on the bottom of the cushion (grease pen or lipstick)
6. Not allowing the cushion to move, remove the paper from each location allowing the marking agent to mark the tape at each snap location
7. Remove the cushion
8. Do some basic measurement to confirm distance between locations matches pre-measurement
9. Make the center of the mark permanent with an X
10. Drill for the snaps with the appropriate bit – foredeck does not appear to have re-inforcement. Will plan to drill with a bit that is the size of the pitch diameter (halfway between major diameter – threads, and minor diameter – shank)
11. Countersink the holes
12. Remove the tape
13. Cover threads and collar with sealant and screw in snaps
14. Clean excess sealant with acetone
Same questions as above - any missing steps, out of order steps, or better methods? Is there an approach to develop a template (I think this would be challenging).
