We've got a 85 4 cylinder 140 hp 140 Liter Mercruiser that started having an idle problem. Compression check showed 60 lbs on #2 and #3. Removing the head confirmed my suspicions that the head gasket was blown. Further inspection shows a hairline crack between the two cylinders. <br /><br />Is there anything that can be done, short of replacing the head?<br /><br />Can I put some JB Weld, or something into the crack to make it last a while longer, at least through the season?<br /><br />Mik