After getting my 115 Johnson back together and working out all the bugs I noticed a small problem. A small pool of water in the lower engine cowling prompted me to search for a leak. Upon close examination I found a pinhole leak in the top of the starboard headgasket. I re-torqued the bolts a couple of times but still have a fine mist of water out of that leak. Tightening bolts is not going to stop it so here is my question. If I pull the head and reseat it do I need to replace that new $20 head gasket? I know you are not suposed to reuse headgaskets but I hate to trash a new one.