Changing out my gear lube oil and ordered new screws to replace my almost stripped ones. Come to find out the lower screw for my make of engine listed in all the schematics is not the one on my engine. The top drain plug I received is correct but the bottom one is not since its Threaded on the inside. I cannot find this one anywhere since every site lists the one I ordered for my model engine. Anyone know what this one is? Or where to find? Pics included. Motor is Evinrude.. Model E50TSLECC. Thank you!