Congratulations, the Kennebec with serial number 18175 is a 17 foot long Katahdin model type A as shown on page 166 of volume three in the Kennebec ledgers. It was planked by Cameron on November 8th, 1924. The canvas covering was applied by Tuttle on November 29th, 1924. The first filler coat was applied by Leonard on December 6th, 1924. Tuttle applied the second filler coat on December 13th, 1924. It was railed by Gilleash on February 14th, 1925. The original exterior paint color was a black body with a red border and a gold stripe. It shipped to location number "25-122"on March, 9th 1925. This location is probably an order number but we don't currently have enough information to identify it. The scans of these build records are attached below. These original Kennebec records are reproduced through the courtesy of the Maine State Museum.
The microfilms and scans of these records were created with substantial grants from the Wooden Canoe Heritage Association (WCHA) as you probably know well. I hope that you will donate, join, or renew your membership to the WCHA so that services like this can continue. See https://www.woodencanoe.org/about to learn more about the WCHA and https://www.woodencanoe.org/shop to donate or join.
It is also possible that you could have another number or manufacturer if this description doesn't match your canoe. Feel free to reply here if you have any other questions.