Reply To: johnson jw-17 water pump question

[Don]

Like Frank says, these engines can be tough to check cooling wise because they run at very different temperatures depending on where you check.  The exhaust cover and head will be pretty warm/hot for the reasons Frank mentioned.  Usually, the temp is checked on the starboard side of the block near the ID core plug.  The engine shouldn’t get hotter than 165F at this point.

There should be a very fine spray of water/mist being expelled from the area that Mumbles pointed out.