Moses11 wrote:I am looking for the measurements for the teak hatch cover for the stern plug...
I think you mean you are interested in the measurement for a teak cover for the aft cockpit sump. Is that right? Since you have the boat, can't you just measure the opening recessed area and get the measurements from that?
The aft cockpit sump cover on a classic OUTRAGE was typically made from teak plywood. The outboard side of the cover was fixed in place. The inboard side of of cover was hinged and opened. The line of the hinged joint was parallel to the keel center line.
The hinged opening allows you to reach into the sump and install or remove the sump drain plug. The fixed portion was fastened in place with four self-tapping screws. You should see the original holes from these fasteners. Re-use the same holes when you make a new cover.
The outboard edge of the sump cover typically had a diagonal or perhaps half-moon circular relief cut into one corner to allow the fuel hoses to rise out of the rigging tunnel and connect to the engine. Any other cables coming out of the rigging tunnel also pass through this opening.
The portion of the cover that opens is slightly larger than the portion that is fixed in place. Again, you can judge this from observation of the original fastener holes in the area of the sump in the recessed lip.
Moses11 wrote:...will it be just easier to make [one instead of buy one from a artisan that makes them]?
The degree of difficulty for you to make a cover is unknown to me. I have no knowledge of your skills as a carpenter. Because the shapes are mostly straight lines, the sawing of the wood should be accordingly simple. The edges are usually rounded by sanding.
I recommend using WEST System clear epoxy to coat the wood after you have finished fabrication. This will completely seal the wood and prevent moisture from creating wood rot (a problem in freshwater as might occur if rain water collects in the sump).