According to the latest information available, the boat ramp named Northeast 140th Street 20740, Fort McCoy is located in Marion County, Florida, at a latitude of 29.35551071 and a longitude of -81.81256104. It is a public boat ramp that provides access to the Ocklawaha River, which is a tributary of the St. Johns River.

The Northeast 140th Street 20740 boat ramp is maintained by Marion County Parks and Recreation Department, and it is reported to be in good condition. The ramp is wide enough to accommodate two boats at a time, and it has a concrete surface that makes for easy launching and retrieval of boats.

As for the types of boats permitted on the water, the Ocklawaha River is navigable by a variety of watercraft, including motorized boats, canoes, kayaks, and paddleboards. However, it is important to note that all boaters are required to comply with Florida boating regulations, which include having the necessary safety equipment on board, following posted speed limits, and observing no-wake zones near shorelines, docks, and other boats.

In summary, the Northeast 140th Street 20740 boat ramp in Fort McCoy, Florida, is a public boat ramp that provides access to the Ocklawaha River. It is well-maintained, wide enough to accommodate two boats at a time, and suitable for a variety of watercraft.