Damn.!!.....Streets.. Ya beat me to the punch...The truth about "freeze plugs" that is.....Ya use rubber plugs and blue shit.!!!!!!!...Oh Man .!!! I hate them both...I won't rant any further than that....In a pinch I still use the Dorman brass colored plugs with the acorn nut that expands them into the hole....They stay put.!!.....While out of the vehicle I install the plugs from Mercruiser which are all brass.................................Ok..Ok....Uncle Bob.....tell me this....Where did "Welch Plug" come from when pretaining to "freeze plugs"...I'm serious here. ....And furthermore .....Some American made outboards do have a soft plug... ....Well it's actually a "welch plug" ...(remember the dish type "soft plugs"....It's a welch type dish plug that the S/N is stamped on and tapped into a recess..Damn.!!.....welch plug....freeze plug....soft plug....core plug ?......I never know what to call the stupid things.!!!!.....