Heck there hardly any forces of torque on the transon of an inboard boat from the motors weight.the weight of the motor is completely supported by the hull floor. Hanging an outboard off a gill bracket that is bolted to the transom of a stern drive boat.creates ALOT more amount of leverage and force than the inboard motor did!!!! I dont understand how anyone can with any kind of physics uldnt see that the needs of an outboard mounted transom differ a lot to those of an inboard. I think more damage comes from trailering and running on bumpy roads that the effect of the HP force on the transom while under power in the water!! You would need a lot more structural support on your conversion just to keep the transom sound for trailering on the road!!! I took the splash well out of my 180SS man it is afixed all over the place!!! from the looks of it the islander I am going to get has no where near the amount of structural support.the weight is low and there is no moment arm of force to try and pry the transom up and down. the transom on an outboard designed boat should be much stiffer.i'd install some brackets that tied the top half of the transom to the stringers in the floor or a cross brace that is attached to the stringers. The transoms should be a lot different.on an inboard.they is very little potential energy.the weight is inside being supported by the hull floor.on an outboard it is cantilevered off the back.and has a moment arm. I just looked at some pictures of my islander, and the transom is angled way more than I might be 13 degrees after all!!! I would do the same project.and might still if my 6 cylinder mercruise cant come back to life. You will change the posture of the boat for sure hanging the motor way off the transom on a gill bracket.might have to forward weight that boat.like ballast up front.somethings that is static.( not like a fuel tank!!) you would have to add a motor mount.īecause for one.the top opf the transom is way to high!!! its like 40", as a matter of fact i just looked at the literature i just got for my islander, and it says the transom is indeed 40" high!!.maybe the SS is lower? Progress has been slow - had to remodel the house first (first mates priorities) but will get there one day.My guess is that the angle of the transom on an I/O is not right for an outboard!!! I am having serious doubts as to wether that transom on my I/O is anywhere near 13 degrees!!!.looks like maybe 5 degrees at best. Retired with time to do most of the work myself. I like the older designs with some bright work. Engines and outdrives were completely gone, found a good pair of used outboards. The economics are driven by a number of factors. Instrument Panel is coming out, all glass going back in - 2 x10" touch screens - driven byRPI-3B's running linux -NMEA 2K bus along side two Suzuki display. Old cable steering is out, going back with hydraulic. Transom is solid but will be adding additional bracing just to be on the safe side. Hope to close up the transom and mount the custom Armstrong bracket in the next few weeks. The cuddy cabin is big enough for the wife and I to over night, head and galley are handy too.Īt this point I have cleaned all the unnecessary hardware out of the bilge. Did not enjoy the noise and vibration from down below. We ran the Merc's IO for 10 years and really enjoyed the open rear deck. I'm in the middle of doing just that! My '87 270 Amberjack is being refitted with two Suzuki D175's.
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