In 1977 Arctic bought Lund American Boats which included the Shell Lake boat Company (Lund bought the Shell Lake Boat Company in 1968 to add fiberglass boats to their already existing line of aluminum boats). For Arctic this was to gain more manufacturing plants in MN, WI and Manitoba. It was the Arctic division called "Spirit Marine" that marketed inventor Nelson Tyler's "Wetbike" from 1977 until 1982. When Irwin Jacobs bought Lowell Swensons controlling interest in Arctic Enterprises in 1977, Larson Industries (which was on the verge of bankruptcy) was also added to the list of Arctic subsidiaries. Jacobs had paid $575,000 for Larson Industries which was based out of Little Falls, MN just as he was coming into control at Arctic Enterprises. The Sundance jet boat idea originaly came from Larson Industries. Sundance was built by Lund marketed under the Arctic Marine name from 1979 to 1981. Spirit outboards were not produced after 1982 when Suzuki entered the outboard motor market on their own.  The Wetbike division was taken over by earlier Arctic Enterprises VP Ralph Loehr who started Sea Crest Inc. (1983-84). It then went to Wetco (1985-87), Ultranautics (1987-92).  AVR Corporation produced the Wetbike prototypes prior to Arctic Enterprises taking over the product.