How Hot should the fly wheel be?????

Steve135

Petty Officer 1st Class
Joined
Aug 26, 2002
Messages
394
kinda a strange question but I just rebuilt a 1984 Evinrude 70 hp 49 cid because of a overheat. All is well the engine runs better than before the overheat due to mostly new parts and gaskets. I launched the boat today in 40 mph winds here in NJ. I only ran about 1 mile at mostly 1500 rmps thru a cannel with the current. I only maybe got to 2200 rpms prior to reaching the dock. The whole run took 10 minutes. I was checking under the hood to see everything was ok and and rested my palm of my hand on the fly wheel top it was very warm. I could keep my hand there but it would have been hot after more than 20 seconds, I would have to remove the hand or be burned but not like fire just hot. <br />Is This normal or is this a sign of bearings?????<br />steve
 

Walker

Captain
Joined
Jun 15, 2002
Messages
3,085
Re: How Hot should the fly wheel be?????

Sounds mighty hot to me, but with all new parts that motor is going to be tight therefore creating more friction heat. I'd give it some more running time. Just be careful and not get it too hot. How hot were the heads?
 

Steve135

Petty Officer 1st Class
Joined
Aug 26, 2002
Messages
394
Re: How Hot should the fly wheel be?????

Walker- If you mean how hot was the engine heads while and after the running they were cool. The rest of the engine was cool. The tell tail water wasn't even warm. I did ask a friend to check his motor and he found the same on his motor the fly wheel was pretty hot to the touch after running it. I am guessing its connected to the crank that goes to the three pistons that has no cooling at all so why not be hot!<br />steve
 

Yepblaze

Lieutenant Commander
Joined
Jun 1, 2001
Messages
1,686
Re: How Hot should the fly wheel be?????

They get hot enough that you certianly wouldn't want to lean on em if you were reaching over to do a plug check. That's normally.
 

rickdb1boat

Supreme Mariner
Joined
Jan 23, 2002
Messages
11,195
Re: How Hot should the fly wheel be?????

Check your T-Stats. Sounds like they may be stuck open!
 

Steve135

Petty Officer 1st Class
Joined
Aug 26, 2002
Messages
394
Re: How Hot should the fly wheel be?????

rickdb1boat- T-stat is brand new with the rebuild. Seemed ok when I installed it.Tell tell never got warm thou?<br />steve
 
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