rwehuman wrote:
I want to be on the water this weekend, I thought I would ask the right way to deal with this size in consistency. tap? Die? what size exactly? small pipe wrench and force it in crossing your fingers the threads line up? you tell me... : )
You won't want to use a pipe wrench -- a Crescent wrench on the flat spots is the right way to install the mast. If you look at the threads closely you will notice they are custom cut -- don't try your tap and die set. Go to the dealer and swap your sprocket for a new one. That's what warranties are for. Take your "fat" mast and make sure it fits. If not, swap your mast for a new one. If you're not comfortable installing the new sprocket, ask your dealer to do it for you.
If you can't do this by the weekend, put your old fin(s) back on and it will work for the weekend, though you'll get a little rock & roll action with one long and one short fin -- it won't hurt anything on the tandem (I wouldn't recommend this on the smaller singles -- probably more rock & roll than you would like).
Make sure your new sprockets are fully seated (a dry run marking the seating depth helps). They're supposed to fit tight. Use Locktite Blue even if you think you don't need it. Without it, your new masts will eventually un-thread and fall out at the most inconvenient time.