There are many web sites that offer boat covers. You can find some nice ones at CarCovers4Less.com. At this site they have polyester covers for a 12' Gamefisher for $59.99 up to polyester canvas at $109.99. It will all depend on what you are looking for and how much you want to spend.
The year is a sears gamefisher 5.0 hp model 225-587505? Looks to be as early as the 70's. You can look online for the little amount of information that you can find on this old particular model.
www.searspartsdirect.com Put your model number in, there are still many available parts..
e-bay
the model number is #57158762 and serial number is 7621447
Unfortunately boat covers do not come in a wide variety unlike other covers or accessories. To find a boat cover that may be similar to your University of Oklahoma you can visit www.discountboatcover.com.
There are many sources to purchase a cover for an outdoor umbrella. They can be found at several popular retailers, like Target, Kohl's, Sears, and Walmart.
There are many insurance companies that cover aquatic vehicles. Three major insurance companies that handle boat insurance or quotes include Progressive, Allstate, and Geico.
The cheapest spa cover that I was able to find is Blue Wave Low Mount Cover Lift which is sold for approximately $45 and up. This particular cover can be purchased through Amazon, Sears and K-Mart.
One can find what is for sale on Sears on the offical website "Sears" under "This weeks hot deals". One can also find sales for Sears on "The black Friday" or "Reuters".
This part as you may know has been descontinued in the line of force/Sears/Gamefisher, in fact you will not be able to order it from any aftermarket companies and in adition to that, these parts are so rare that you won't find them used for sale online. 3 solutions: 1st; purchase a non working (for parts) 9.9hp/15hp Force, Sears or gamefisher outboard and remove part needed. 2nd; go to a local used marine parts retail store (they ussually have hundreds of outboards sitting in the back ) and look for the part that you are looking for. Most times its a do it yourself kind of thing. 3rd; find a used pair of ignition coils made by Mercury/ Evinrude/ Johnson (with aprox the same year and horse power) and re-wire them based on its specifications (make sure they are grounded properly) . this 3rd solution is a litle more complicated based on the fact that you will need to tap new screw holes etc etc, the good thing is that by doing it this way your outboard will perform better because mercury,evinrude and jonhson's ignition coils are the best ever made and will perform great for years. for further questions please feel free to ask at ladron16@live.com (this is what I did and I have been enjoying my 14 ft john boat and It has never run as good as it does now)
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One can find more information about Sears Garage Doors from the following sources: Sears Garage Doors, Sears Garage Doors Designer, Sears Home Services, Sears Parts Direct.