Re: 1985 johnson 9.9 running temp

[davesko]

Thanks guys, I just bought this motor and didn’t run it before impeller replacement, which by the way was the full kit, housing,impeller seals and plate. Not sure it was a salt water motor or not. I know it sat for at least 20 years. I became concerned when I felt the head temp so I took some readings 145-190 depending on where on the motor it was. I’m used to my old motors running cool so this one concerned me. Never had it on a boat yet and won’t till I figure out if 190 is too hot. I do know when it’s running in gear and throttled up it runs like 165 degrees. I’m not going to rip this thing all apart till I do more research. Anyone else have a 9.9 and know what temp it runs at? Should I run it on the boat for a short while and see if maybe it runs cooler? Thanks Dave