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  1. tpenfield

    I/O (Sterndrive) Conversion to Outboards

    I got my bolts, so the fastener portion of my installation is ready. I have been planning the adhesive aspect, being the hull & deck putty. I consulted with our good friend (Jody) on the compatibility of VE resin and polyester resin. He stated that they are 100% compatible. So, my plan is to...
  2. tpenfield

    I/O (Sterndrive) Conversion to Outboards

    I am finding the surfaces are quite un-even, and the top surface of the transom and stringers is 1808 fiberglass, which has the texture like those corduroy pants from 50 years ago. The gel goes down into the crevasses :cautious: So I was concerned about grinding some areas too much, as there...
  3. tpenfield

    I/O (Sterndrive) Conversion to Outboards

    I made the mistake of touching an area of the fiberglass that had been ground . . . ouch . . . microscopic fibers in my finger :oops: I used the Hull & Deck putty to set these pieces of the transom support structure in place. . . OMG !!! :eek: . . . It's warm enough outside to have the...
  4. tpenfield

    I/O (Sterndrive) Conversion to Outboards

    Interior grinding is done. I still have the grinding outside the transom to do . . .
  5. tpenfield

    I/O (Sterndrive) Conversion to Outboards

    I have both a cordless and corded angle grinders. Running 40 grit flap disks. . Progress so far . . . . . I've been using the cordless, since the corded goes too fast. I was getting a lot of static electricity as I was grinding, which I was not too keen about. I kept a mist spray bottle...
  6. tpenfield

    I/O (Sterndrive) Conversion to Outboards

    I'll probably run my changes by the N.A. to see if there are any concerns. He was pretty good with the design and safety factors that I had applied.
  7. tpenfield

    I/O (Sterndrive) Conversion to Outboards

    Transom support structure is roughed out. . . Now onto the final grinding . . . Oh joy . . . :p . . My cordless angle grinder is being put to the test.
  8. tpenfield

    I/O (Sterndrive) Conversion to Outboards

    Here is the difference in those 2 boats (Formula 310 I/O vs OB) The outboard version has the hull extended at the full height of the transom and distributes the load to the outer areas of the hull. (actually a clever design) . . . . The I/O version does not have the hull extended and is...
  9. tpenfield

    I/O (Sterndrive) Conversion to Outboards

    Good question and I am glad you asked . . . I can answer that with a series of drawings that track the forces created by the engines, through the extension bracket, and on to the transom and the stringers within the hull. #1) The forces of the engines (note that the force placed on the transom...
  10. tpenfield

    I/O (Sterndrive) Conversion to Outboards

    A day of cutting and grinding . . . . I got a lot of the transom reinforcement structure cut . . . still a few more pieces to go. . . . . I hope to be glassing this in over the next couple of days.
  11. tpenfield

    I/O (Sterndrive) Conversion to Outboards

    No I used the red & black measuring tape on both . . . Just a smidge off.
  12. tpenfield

    I/O (Sterndrive) Conversion to Outboards

    I am cutting the Coosa board for the additional stringers and transom supports. I have another unit of measure for @redneck joe . . . These 2 pieces are supposed to be the same dimension, but the one up top is off by a 'smidge' . . . :unsure: .
  13. tpenfield

    I/O (Sterndrive) Conversion to Outboards

    Because the place only had the #400 . . . I can play temperature games to extend the open time.
  14. tpenfield

    I/O (Sterndrive) Conversion to Outboards

    I picked up the Hull & Deck Putty this AM . . . It is poly-based, but hopefully will be OK, considering I'll be scarf joining the extension bracket to the hull as well as my 50 +/- bolts. . My plan will be to start the putty cold (60˚F ish) to slow it down, then add heat to the E-B once it is...
  15. tpenfield

    I/O (Sterndrive) Conversion to Outboards

    The words for the day are 'pressure washer' . . . :ROFLMAO: that will do the trick. I think I there may be a new pressure washer in my future, because the reigning machine had a throttle/governor mishap. Anyway, I've been trying to get this 'bonding plate' off the transom for the past few...
  16. tpenfield

    I/O (Sterndrive) Conversion to Outboards

    More engineering on-the-fly . . . design change #6,157 :ROFLMAO: . Given that the underside of the swim deck has as much fiberglass in it as the transom, I have changed the transom reinforcement, eliminating the struts that were to extend in the swim deck cavity, and moving the top...
  17. tpenfield

    I/O (Sterndrive) Conversion to Outboards

    I have offers for help. :D
  18. tpenfield

    I/O (Sterndrive) Conversion to Outboards

    I cleaned-up some of the wiring in the (former) engine bay in preparation for some grinding and glassing. . . I put a few 1/2" spacers on the extension bracket and tried another fit. . . I got my laser line thingy, so I checked the alignment with the keel. . . Looks OK . . . better than I...
  19. tpenfield

    I/O (Sterndrive) Conversion to Outboards

    Quick update . . . Maybe not so quick I spent much of yesterday trying to get the extension bracket aligned, since it seems to be off once re-attaching it. I think the rear portion of the boat (swim deck) is symmetrical, but maybe not, because my centering measurements are off by about 3/4"...
  20. tpenfield

    I/O (Sterndrive) Conversion to Outboards

    I did some more grinding. The fit is better. . . . . Of course, every time I loosen up the extension bracket and re-seat it, squareness seems to go out. Yesterday it was pretty good . . . today, not so much. Laser line tool is on order.
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