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Hello. I have a 1980 8hp Mariner outboard that starts great and after 4-5 min gets very hot and sluggish. I finally got the lower unit off and the impeller seems to be fine. Looked in my manual and it does't say much. Please help. Thanks, Chris
This link shows a breakdown of the crank case and head. It also shows the Thermostat. You may try pulling the cover and checking the condition of the thermostat. It may need cleaning or replacing. You can also try running it without the thermostat and see if the problem persist. If it does then there is probably a blockage in the water pasage. Also if the impellar has not been changed it is always good practice to replace it. http://www.dougrussell.com/partscat...=7,8,13,1,4,5,15,3,9,17,18,11,16,6,20,2,19,12 ,14,10
I finally got around to removing the thermostat to see if this was my problem. It ran great for about 3-4 min, then heated up and got slugish. I shut it off and let it cool for an hour and it started right up. Any other ideas...Please help
