Running T-Stats VS No T-Stats

[macojoe]

My merc runs hot all the time, it always smoke from the heat, man if you hold your hand in the water it will burn a hole in it!!
BS said this is normal for them?? That you will foul plugs if you no run T stats??
Well it scares the crap out of me so I took the T stats out for the summer,(water temp mid 60's) I will reinstall for the colder months, But motor still smokes and runs warm now not hot, and I have no temp gauge so not sure were its at. But plugs are good and motor runs great all the time, i just let it run a bit before I take off.

[THEFERMANATOR]

Originally Posted by macojoe

My merc runs hot all the time, it always smoke from the heat, man if you hold your hand in the water it will burn a hole in it!!
BS said this is normal for them?? That you will foul plugs if you no run T stats??
Well it scares the crap out of me so I took the T stats out for the summer,(water temp mid 60's) I will reinstall for the colder months, But motor still smokes and runs warm now not hot, and I have no temp gauge so not sure were its at. But plugs are good and motor runs great all the time, i just let it run a bit before I take off.

Your playing a DANGEROUS game MJ. Mercs cooling system is designed to have the t-stats in not only to maintain the temp but to restrict flow through that area. Without them in there the poppet valve won't open and this WILL cause hot spots in portions of the block. Removing the t-stats in many engines(not just outboards) WILL cause overheating and blown headgaskets.

[Blu_Lunch]

Originally Posted by macojoe

My merc runs hot all the time, it always smoke from the heat, man if you hold your hand in the water it will burn a hole in it!!
BS said this is normal for them?? That you will foul plugs if you no run T stats??
Well it scares the crap out of me so I took the T stats out for the summer,(water temp mid 60's) I will reinstall for the colder months, But motor still smokes and runs warm now not hot, and I have no temp gauge so not sure were its at. But plugs are good and motor runs great all the time, i just let it run a bit before I take off.

My Mercury telltale is very hot also but today I bought a IR thermometer, ran it around the lake a few times at 4600 rpm stopped the boat put it in neutral popped the cover open and the head temperature was 148.2 and 147.9. I'll tell you I put new T Stats Saturday and it idles better than before, real smooth........

[macojoe]

but its so hot it scares me!! i guess i will have to get a temp gauge and watch it

[THEFERMANATOR]

Originally Posted by macojoe

but its so hot it scares me!! i guess i will have to get a temp gauge and watch it

Anything over about 120-125 degrees will make a lot of steam and feel unbelieveably hot. Loopers need to reach at least 125 in order to idle somewhat cleanly, and 140-160 is normally better for idling.