Two Engine Temp Qiestions
Hi everyone. I have a 2000, 280 SS with twin Mercury 350 mag MPI Motors. They have about 500 hours and I've always been great.
I just put her back in the water after offseason maintenance, which included fairly extensive work on the port motor to include a tune-up, impellers, wires, plugs, Etc.
Prior to this work that engine always ran around 168 while cruising. Now it's closer to 175, and I think hit 178 at one point yesterday while cruising. Also, interestingly, the temperature would move back and forth between 174 and 178 throughout the day. There were no performance issues.
The starboard motor hovers around 165 very religiously.
So my two questions are this. Is 175 to hot? And is that fluctuation sign that the mechanic screwed something up? This all started after he did his work so I assume somehow he has affected it. Thanks so much.