Standard Motor Products AC423 Idle Air Control Valve is the nonn- Mercury IAC part and is $43.00 on Amazon. I carry a spare and correct allen wrench size.
DO it
I had my boat in high n dry storage and it was great.
Boat in on lift behind my house now and frankly it was easier to clean and "deal" with the boat when at high and dry facility
I use a product called "Iron Out" a little less aggressive than Hull cleaner.
Works for me on "stain" mix in a gallon pressure sprayer spray on and rinse off after a couple minutes.
I use this style pump sprayer and use about 1/2 the product vs. using a squeeze trigger bottle.
https://smile.amazon.com/Solo-418-One-Hand-Pressure-Sprayer/dp/B000BX4VXI/ref=sr_1_3?ie=UTF8&qid=1487857265&sr=8-3&keywords=pump+sprayer
Presta 131932 Strata Ultra Cutting Crème is the BEST for cleaning
https://www.amazon.com/gp/product/B0082LFIJM/ref=oh_aui_search_detailpage?ie=UTF8&psc=1
Still searching for the perfect wax......................
I would put a temporary spacer between the latch and windshield frame so they rotate after a pop rivet is used to secure.
I think without a spacer the rivet would pull it too tight?