brettmarl
Regular Contributor
For several months, I've been been watching the engine-temps on my Twin 225's (AK3) diverge. It appeared as if the Port engine (newer) was running 5-15 degrees hotter than the Starboard. Usually temps are bang-on. Tested and swapped T-stats, verified both engines have strong pee-stream, nothing helped, was planning to IR-gun the coils and look for anomalies, until...
Yesterday, I got a persistent O2 sensor code on Sarboard that would fire every 5m or so when underway. I've had one or two O2 code-trips in the last month, so kind of new it was on it's way out...
Swapped the O2 sensor for new - and boom - engine temps are perfectly matched again. So in hindsight, the Port engine wasn't overheating - it was the Starboard that was either a) running cooler, or b) under-reporting it's actual temperature.
Does this make sense? Does the 225 use the O2 input to report engine temperature somehow?
Yesterday, I got a persistent O2 sensor code on Sarboard that would fire every 5m or so when underway. I've had one or two O2 code-trips in the last month, so kind of new it was on it's way out...
Swapped the O2 sensor for new - and boom - engine temps are perfectly matched again. So in hindsight, the Port engine wasn't overheating - it was the Starboard that was either a) running cooler, or b) under-reporting it's actual temperature.
Does this make sense? Does the 225 use the O2 input to report engine temperature somehow?