My 3116s usually reach temps of 185 at cruise. Yesterday, the stbd engine went above that and reached 195. It never went above that, but it did go down when at idle. I haven't looked into the issue yet, but I first plan to open the strainer to look for any clogs. Other things to note: - The impellers were replaced in April, but I will open the cover to confirm that it's still in good shape. - Last month my mechanic used a scope to look into the heat exchangers and while they weren't perfect, they weren't bad either. We made a plan to change the coolant, replace the thermostat and clean the heat exchangers during the off-season. - I'll have to go back and look through the POs records, but as of now, I have no idea the last time the thermostat was replaced. Can I simply pull the thermostat to inspect it? If so, what sort of signs should I be looking for? Thanks in advance for any advice.