Overheating

[Reckless]

 Evinrude 1992 100 HP. Started it up a few days ago darn thing overheated. Replaced Tstats. Water pump 2 years old with very few hours. Maybe 20 at the most. Flow is pretty strong. Put new Tstats in with new poppits. Overheated again. Right bank I can tell by touch. If I let it cool down and run it again its ok. My though on this is that there is air being trapped around the tstats. Dropped tstats in hot water and both seem to open at the same time. I have read somewhere that drilling a small hole (.060 ) in the poppits helps  Any in thoughts on this problem.

Thanks
Frank

[Luna Sea 5]

make sure your intake isn't clogged, she needs to spit water.

[mboy]

Evinrude 1992 100 HP. Started it up a few days ago darn thing overheated. Replaced Tstats. Water pump 2 years old with very few hours. Maybe 20 at the most. Flow is pretty strong. Put new Tstats in with new poppits. Overheated again. Right bank I can tell by touch. If I let it cool down and run it again its ok. My though on this is that there is air being trapped around the tstats. Dropped tstats in hot water and both seem to open at the same time. I have read somewhere that drilling a small hole (.060 ) in the poppits helps  Any in thoughts on this problem.

Thanks
Frank

[wb]

How did the salt encrustation look inside he water jackets when you changed the tstats?

Is there a garden hose flush fitting or can you add one to (back) flush it?

Don't know about drilling poppets, therefore I wouldn't.

If you have good flow it is likely a clogged passage usually a small one from sediment or salt.

[Reckless]

  I am able to back flush which I did. Flow seems to be the same on both banks. Some other forum mentioned about V cut in top of Tstats. Some of the replacements do not come with it. It is to bleed air out. So water can get to tstat. Will pull apart and check.

Thanks
Frank

[Reckless]

Update:
            Removed tstats. There is a notch but very small. A grain of sand would have plugged it up! I made the notch alittle larger. Put it back together. No more overheat. If I lay my finger on the block I can feel the temp change. Not drastic but you can tell  tstats are working.

[wb]

Wow nice fix (hopefully.) 

I had Tstats and w/p done over winter hopefully no probs with the work. Never had any before but I was on borrowed time.

[Capt. Joe G]

Nice catch on the grain of sand.. I had a similiar problem with a piece of sea grass clogging my discharge line!