Hi Pat,
I have replaced these. It really ISN'T a tough job, IF the wiper assembly will come off the motor shaft... and none of the three that I have replace would do that.
First off, if you have checked BOTH fuses (one for the wiper motor, one for the parking function) and they are good, then you'll need to order an AFI (manufacturer: Marinco) replacement. If I recall, it is a model 1000. You need the right shaft length, so when you pull the motor, measure it: either 1.5" or 2.5"
To remove: there are three set screws under a cap where the wiper assembly attaches to the wiper motor shaft (under the brow of your boat). Use a small alan wrench to remove those set screws. Pull like crazy on the wiper assembly. Odds are pretty good it won't come off. You can buy a battery lug puller, but I couldn't get one to fit. I used a Dremmel and cut the shaft off. Be careful you don't dig into the fiberglass.
With the wiper assembly (the part that wipes the window) off, remove the nut from the bottom of the shaft so you can pull it through from inside the boat. Go back inside the boat, remove the nuts holding the wiper motor in place. (helps if you have someone outside to hold the other end of those screws). This is easy. As you remove the motor assembly, you will see the wire that get the power to it. Make yourself a diagram so you know what wire attaches where on the new motor.
The new motor is probably set for an 80º sweep, parking on the right. You can open the motor up, and find/flip the switch that gives you a 110º sweep if you want.
Reassemble in the reverse order. In all likelihood, you will not get the wiper assembly off the end of the shaft, so you'll probably need a new wiper assembly.
Now, the interesting part: what position you mount the new wiper assembly isn't going to be right when you first put it on. If it is, go buy a lottery ticket. It is a splined shaft, same with the inside of the wiper arm... you will probably have to make small adjustments so the wiper blade wipes in the right place on the window. Trial and error. Mostly error. When everything lines up right (and you will almost certainly have to make adjustments to the arm lengths on the pantographic wiper assembly - more trial and error), tighten the set screws and you are done.
The wiper motors are overpriced - expect to pay $160 to $180. The pantographic wiper assembly will run you $40 to $60. The fun of taking it apart and putting it back together is priceless. :wink:
I'm working from memory here, hope that helps.
Jim
On edit:
I did an internet search for the motor and pantographic wiper arm, and bought them from the lowest price place. I think Jamestown Distributors stock both. I bought the wiper assembly from one place, the motor from another. Maybe the factory would sell you the parts, making your "hunt" easier. Down in the Tropical Tip, there isn't anyone local who sells this stuff.
Before I retired, I had more money than time. Since retiring, I have the time to fix this kinda stuff... not always the patience. Once you have the parts in hand, the job (assuming you can get the wiper assembly off the shaft - and you CAN'T), should take less than an hour.