Hello, my friend has this motor on his boat. Yesterday I helped him launch his boat for the summer. When I started it, I idled our for a while and kept an eye on the merc gauge (temp). It got up to about 120 (which is about what mine gets to while idling) so I got up on plane. Almost instantaneously the temp dropped to 82 degrees so I went on a slow plane around 2800 rpm but the temp never got above 84 or so.
What is the correct running temp for mercury? My hpdi will get up to about 140 or so when on plane. Also, his throttle is very stiff. It’s very hard to adjust the rpm slightly because it takes so much force to move it. Is there an adjustment for this?
thanks in advance!