Benjaminlbarker
Cadet
- Joined
- Nov 6, 2013
- Messages
- 9
I've got twin Mercruiser 470's (1986 Mercruiser 190) I've been dealing with. I know... During testing and trouble shooting these motors have gotten to 220 degrees max, read from an IR thermometer pointed at the sender. Been having problems with the temp gauges and other some accessories so it's hard to see the overheat coming. One engine (starboard) is a fresh rebuild and has already been re-torqued after the initial run, the overheat was about a half hour into the run after that. It got to about 210. The port engine has about 400 hours on it and overheated to about 220-230 due to a bad riser/reservoir. So should I re-torque the heads? I've gotten about a 50/50 response from my research thus far from various sources, marine and automotive. I would love a definitive answer from people who have real experience with this. Thanks!