454 Merc overheating, PLEASE HELP!!!
#31
Registered
Join Date: Oct 2000
Location: Kentucky - where the women are so fast we have to put a governor on 'em!!
Posts: 471
Likes: 0
Received 0 Likes
on
0 Posts
![Default](/forums/images/icons/icon1.gif)
Have you checked ignition timing? Timing that is retarded will cause an engine to run hot, and this could also contribute to it dieseling when you shut it down while overheated - the engine will actually kick backwards for a rev or two, as BlueThunder mentioned. With prop exhaust this will most certainly suck water back up the exhaust into the cylinders. The little flappers might not be enough to stop this, either.
Just an idea...
Just an idea...
#32
Registered
![](https://www.offshoreonly.com/forums/images/icons/prop.gif)
![Default](/forums/images/icons/icon1.gif)
I don't mean to insult anybody with this , but are you installing the thermostat upside down? This causes overheating pretty quickly.
Just a thought.
Just a thought.
#33
Guest
Posts: n/a
![Default](/forums/images/icons/icon1.gif)
Originally Posted by Dirthead
Anymore suggestions??? I appreciate all the ideas, however most of them have already been looked into before I posted this initial question. I greatly appreciate all of your comments. If you have anymore, please fire away.
#34
Guest
Posts: n/a
![Default](/forums/images/icons/icon1.gif)
Originally Posted by sutphen30
your telling me you haven't found one thing wrong.well the thing shouldn't be over heating.theres something wrong there