I'm considering adding a pyrometer to my boat.. the current temp gage is for
water, and I've heard from several sources that if there's a sudden
increase, it might not offer enough warning.

Something like this: http://www.livorsi.com/catalog/pyrometers.htm

However, I'm concerned about putting a hole in my exhaust manifold.

Anybody done this? Tips/tricks/things to watchout for?

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"j" ganz @@
www.sailnow.com