I've been running a 1989 Force 85hp with little or no trouble for 4 years. I brought it in for routine preseason work a few weeks ago and the mechanic says there's a cracked cyclinder and recommends a new powerhead. Total cost will be about the same as what I paid for the boat and motor 4 years ago. And like I say, it's been running okay, and I had no idea there was a problem. What is the downside of putting it back together as is and continuing to run it with a cracked cylinder?