heat exchanger

Long story. Get something to drink and sit back. In August my Oberdorfer raw water pump started leaking water out of the weep holes. Universal M-25 XPB with 490 hours. The Obferdorfer was one of the first things I installed when I bought the boat in 2014 (sail no 307, built in 2005). I'm the...

First post, long time reader. Learned a ton from you all! I bought an '88 Catalina 30 MKII 2 months ago, put about 80 hours on her. It came with a 3" heat exchanger that looked to be on its last leg. Always ran around 165 on the gauge, just replaced it with a Mr. Cool model. First time firing...

Not that my 2GM20F is overheating, just that it's 15years old with almost 2,300 running hours. I've never once cleaned the heat exchanger. So is wondering what temperature is normal on engine and where should it be measured. I have only a handheld temperature gun so I can point it anywhere...