I am wondering if anyone may help with this question. I have a 1985 25 hp mercury, tiller. it was running real good, mostly trolling and a short run back to the dock.
there was a bit of up and down with my slow speed so the next day i put it in a bucket and tryed to adjust the idle, well, i ended up pulling the spark plugs and looking in there was water ! also noted a oily thick mess comming from my lower end init. Do I have a cracked block or something more minor, i would rebuild this if its worth it. Thanks, Nat