Re: Tall Boat into a Low Garage
I raised my garage door to the maximum years ago, it was done to allow my to get my high top conversion van inside. I added one door panel to the existing door and raised the header about 11" to give me a full 9' of height. It gave me a full 9x9" opening. I wish I had widened it at that time as well, since I ended up buying a new door a few years later and making it a 9x12" opening.
(If I had it to do over, I'd have tossed the overhead door altogether in favor of two swinging doors to allow even more height.
I would make really sure that the boat will fit inside the garage, measure the outdrive to bow tip or longest point on the tongue as it will be stored. Take into account that the length may change when the boat tilts and that you will also have to consider the width of the boat vs. the door's width.
I just barely used to fit my 19' Renken into my garage with an 8x8' door opening years ago, I had to back it in, lower it on stands for the winter. I also had to tilt the motor all the way in, remove the prop, and pull the trailer out and that just gave me enough space to slide under the bow to get the door locked. The garage measured 25' deep from the door to the drywall. I also had to remove a section of drywall to allow the outdrive to fit between the studs. Getting it in and out was a real chore, I also had to remove the trailer fenders to clear the door opening since the trailer measured 98" wide with the fenders on.
If you find that your boat will indeed fit, figure how much you need to lower it to make in in the building, take into account any change of height as you enter the garage too, often a garage floor will be a few inches higher than the outside pavement. If you can't make the door opening larger, then your only option will be to make the boat duck into the garage somehow. I'd consider making a custom dolly to do the job if this is going to be a regular event. Something that is well secured and easy to use. I've used dollies called Go Jacks to move cars around while working on them in the shop, as well as a few sets of jack stand welded to dollies which move things around without wheels. The problem may turn out to be outdrive ground clearance vs. length. When you lower the boat that far, you may have to tilt the outdrive or motor thus making the boat longer.