TPI on Lower unit drain plug

[danacman]

Just got a "99 Johnson 115. Model J115PLEEM
Need to insert heli-coil on lower unit drain-plug. Does anyone know the size/threads per square inch on the plug/screw?

It's this one
Magnetic Drain Screw for Johnson, Evinrude 318544, OMC Sterndrive Cobra, GLM 21731 - Sierra 18-2378

thanks

 

[racerone]

Re: TPI on Lower unit drain plug

Threads are not normally specified in threads per square inch.-------------The thread on drain plugs is 3/8--NC