115 not running hot enough

[kynolan2183]

Re: 115 not running hot enough

one more thought.
My boy running a 100 degree fever I need a thermometer to tell if he is hot. My hands can't get a 2 degree difference so if you are feeling a difference then I would say you are close to the 125.
Why not get a glass of water heat it up to 125 and do a finger test between the two.
Better yet get your wife, girlfriend, or flaming other, who does not work on engines with their hands to do the test. Just a sugestion because i know my hands are so messed up from buying and fixing old crap that at this point I don't even know when they are bleeding some times.
Kyle

 

[ezeke]

Re: 115 not running hot enough

I wish that I could help here because I have yet another V4 crossflow to rebuild myself. The way it looks to me is that every bit of water except the tell-tale runs back through those 4 openings in the thermostat housing so the answer has to be right there.​

The vernatherms look the same, but they are not. The temperature rating is usually stamped on them but hard to see. If you have those OMC 384719 or Sierra 18-3560 vernatherms in there don't expect much warmth because they are only rated at 105? F. One of the parts motors I bought a few years back had a 105 on one side and a 143 on the other. ​

I run the 143? OMC/BRP 378065 SS 5005440 or Sierra 18-3553 in my 115. If you can't read 'em, put them in a pan of water with a meat thermometer and see when they are opening. ​

 

[Mas]

Re: 115 not running hot enough

What about spark plugs and/or plug gap...are they correct?

 

[rfiglia]

Re: 115 not running hot enough

thanks for the replies. I am using brand new 143? OMC thermostats. The plugs are new and are gapped at .040 like my factory manual says.Its runs great at idle and high speed. Not sure how much fuel im burning yet (only took it out once last week on a test run) Compression is 120 psi in all 4 Nobody has mentioned the springs and relief valves (they are new also). What im thinking is that they are opening and letting the water circulate even before the thermostats open. I know there are water restricters in the heads (small plastic pieces) maybe they are missing? Maybe there is too much water pressure and forcing open the relief valves. Can this be possible? Rich....

 

[eli_lilly]

Re: 115 not running hot enough

One of the parts motors I bought a few years back had a 105 on one side and a 143 on the other.

I think you might've just revealed the cause of a problem I am having...

-E

 

[rfiglia]

Re: 115 not running hot enough

anyone have a comment on my last post? Took her out for 3 hours yesterday at all different speeds, the hottest it got was 120 at a very slow idle, when I took off at high speed it cooled down immediately. Other than the running cool it runs and idles great.(knock on wood) Rich.....

 

[Theoutdoorsman]

Re: 115 not running hot enough

Your numbers sound identical to mine. I just finished rebuilding my Evinrude 140 and replaced everything brand new. 120's* at idle and about 105* or so under way. Remember, the water temps are likely coooold right now. While your under way, the relief valves are opening and allowing much more colder water to be forced throughout the water passages. This explains why your dropping temperature when you plane off and why the heads feel luke warm to the touch. I'd say relax and enjoy. I can lay my hand on both my heads as long as I care to stand there. If your experiencing NO ill effects, my guess is that your probably OK.

 

[seahorse5]

Re: 115 not running hot enough

anyone have a comment on my last post? Took her out for 3 hours yesterday at all different speeds, the hottest it got was 120 at a very slow idle, when I took off at high speed it cooled down immediately. Other than the running cool it runs and idles great.(knock ....

Let the motor idle then take the cylinder head temperature. Then pinch off both water hoses to the thermostat housing and see if the engine starts to get warmer, at least to 165. If so, then the problem is inside the thermostat housing such as wrong, out of spec, or missing parts.

 

[rfiglia]

Re: 115 not running hot enough

did you read the post? All parts are new OMC and are correct....

 

[tschamp20]

Re: 115 not running hot enough

hey is your name ****?

 

[rfiglia]

Re: 115 not running hot enough

are you a redneck from Virginia? whats your problem?

 

[ezeke]

Re: 115 not running hot enough

Play nice, girls.

 

[seahorse5]

Re: 115 not running hot enough

did you read the post? All parts are new OMC and are correct....

Since I don't know your expertise or the quality of your workmanship, a common problem I see several times a year is that do-it-yourselfers often put the cork gasket on the wrong side of the thermostats or get it deformed. Another common mistake is not installing the grommets under the pressure relief valves. In either case, water bypasses the thermostats and does not allow the motor to reach proper operating temperatures.

If you are sure you did things correctly, then reread my previous post and perform the procedure so you will find out whether you have a problem inside the thermostat housing or inside the engine.

Have a nice day.

 

[rfiglia]

Re: 115 not running hot enough

Hi, the corks are installed correctly, and the grommets are new as well as everything inside the thermostat cover. I was out yesterday and the hottest the engine got was 120 deg. If the water restricters are missing in the heads will the pressure be to high at the thermostats and force the relief valves open to soon? Rich.....