Exhaust tube very hot.Normal?

[kellydee]

Finally fired up my new motor.2007 Merc 5.7 carbed.OH HAPPY DAY !Been a long time coming.Fired it up on muffs last night and ran for 35-40 minutes to work all the air out of the cooling system.According to the dash temp guage,maintained about 175.Oil pressure good,shifts good except a little stiff after sitting 9 months.I'm sure it's the upper cable as I noticed it before I even hooked it up(when installing new outdrive and moved control lever from F to N.Is the best way to solve this to remove the core and lube it?Also,the steel tube from the exhaust manifold to the intake gets HOTTER THAN H$@#.Is this normal?all else seems good cool risers,good water flow out transom.I am SOOO HAPPY.Like a kid with a new toy.want to thank everyone(Don,Bondo,Rick) and I'll soon post thanks along with an outline of all work done and results of the splash test which I hope to do by this weekend.Still,MANY THANKS !! Jerry

 

[Don S]

Re: Exhaust tube very hot.Normal?

Yes, that tube getting hot is normal. That is why there is (should be) a heat insulation tube around it.
There is no lubing the cables, just replace them. The inside gets corroded or a groove worn in the outer sheath that causes the inner cable to bind.

 

[kellydee]

Re: Exhaust tube very hot.Normal?

Thanks Don,Thats what I'll do.Gonna go pull it right now.Matter of fact,I think I'll do the throttle as well since they are the same age.Welcome to Washington.