Re: Re: Over heat Johnson 115 Turbojet

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Posted by Clayton ( on June 28, 2005 at 23:58:52:

In Reply to: Re: Over heat Johnson 115 Turbojet posted by Eric Steuernagle on June 27, 2005 at 19:12:28:

I dug into mine yesterday and think I have found the problem. The thermostat for the starboard bank was pretty crusty. I am going to replace both thermostats and all gaskets. I am also going with some compressed air thru the water jackets from the top of the heads down (the reverse of the water flow) The Thermostats (2ea One for each bank of cylinders) are located in the valve body assembly. The valve body assembly is located between the two lower cylinder heads at the back of the engine as it sits in the boat. It has 3 bolts 3/8in, the one between the water box and the engine is a little tight but the other 2 are easy. You will be working almost blind as it is quite hard to get in a position to see what you are doing. There are 2 water lines you will have to remove first, they go from the valve body housing to the lower 2 cylinder heads. The pressure relief valves 2ea are also in the valve body and they are spring loaded so watch for them when you pop off the housing. Go to and follow the parts link, it will bring up another browser, then follow the engine diagrams link and you will be able to pull up a complete parts list with part numbers for the 115 turbojet. This was a great help to me. I hope this helps. Clayton

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