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A video was included in the box with the IO-360 that Lycoming just sent me.  
In this video, Ben Visser from Shell Oil had an interesting comment.  He said
that oil temperatures at some point within the engine reach about 50 degrees
higher than shown on the gauge.  Since our objective is to keep the oil warm
enough to boil off the condensed water, but not much hotter, then 180 degrees
on the gauge is what we shoot for.  180F + 50 = 230F, and boiling is at 212F,
so I guess that gives us an 18 degree F margin for gauge error and sufficient
dwell time at greater than 212F to get the boiling done.

Can you test a vernitherm in boiling water the way you can test a car
thermostat?

- Rob Wolf
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Please send your photos and drawings to marvkaye@olsusa.com.
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