Absolutely not! 425 is waaaay too hot and you're on the verge of doing damage. 400 should be the max before you need to take action. Not sure about 200 but I would like to see it a bit cooler.
That being said, how accurate is your CHT gauge and what type of probes are you using? Basically you need to carefully check the conditions of your engine baffling, that's all you have to cool your engine. Always make sure it's in top shape. Get into AVWEB and search for John Deakin's articles (Pelican's Perch). John has been able to communicate all the proven data about temps very well. Al DeMarzo Visit the Ercoupe Swap Page Free, Easy and No Membership Required http://www.ercoupeowners.com/swap/swapbook.htm ----- Original Message ----- From: [EMAIL PROTECTED] To: Ercoupe Tech Sent: Friday, July 18, 2008 3:26 PM Subject: [ercoupe-tech] Temperatures With an Outside Air Temperature of 85 degrees, what is a reasonable cylinder head and oil temperatre reading at cruise speed? Mine are about 425 and 200 respectively. Is that normal? Thanks, Fred
