What RPM?
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1994 Protour 190 Restoration
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Originally posted by ONTHECOAST View PostWhat RPM?Last edited by RDahler; 06-06-2022, 04:19 PM.
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I moved the Temp gauge sensor from the side of the mixer to the port in the head between spark plugs 1 and 3 this gives a more accurate temp indication. Indmar made this change in mid 1994 and on. I was able to reattach the sensor wire at the new location by just rerouting it. This location shows the normal cylinder head temp of 170
The last photo my first tow behind the renewed Protour 190
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Was this to achieve a more consistent temp for the engine? Please don't tell me you plan on using that beautiful boat in salt water.
I've only owned one boat with closed cooling which was on a 485 Mercruiser. They used closed cooling on this family of engines to better regulate the engine temp as well as to control corrosion due to the engine using an aluminum block and iron head. I know the trend now is moving in that direction on the larger LS based engines due to their aluminum content as well.
Never had an issue with my 485 but apparently other did as they had a less than ideal reputation early on. I have to say it was one of the easiest boats I owned to winterize and the power to weight that little engine had was impressive in the little 17' Wellcraft it was installed in.
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Originally posted by bturner2 View PostWas this to achieve a more consistent temp for the engine? Please don't tell me you plan on using that beautiful boat in salt water.
I've only owned one boat with closed cooling which was on a 485 Mercruiser. They used closed cooling on this family of engines to better regulate the engine temp as well as to control corrosion due to the engine using an aluminum block and iron head. I know the trend now is moving in that direction on the larger LS based engines due to their aluminum content as well.
Never had an issue with my 485 but apparently other did as they had a less than ideal reputation early on. I have to say it was one of the easiest boats I owned to winterize and the power to weight that little engine had was impressive in the little 17' Wellcraft it was installed in.
The closed cooling system should fix the heat spike problems and control the internal engine corrosion.
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