Use partial heat only if you have instrumentation that tells you the
conditions in the carburetor throat, either optically or by temperature. All
unmodified 150's have Continental engines, according to the Blue Book, and
Continentals are far more prone to carb ice than Lycomings. If I was flying
your 150 I would be watching the RPM really close when in conditions
conducive to carb ice, which are illustrated he
http://www.ez.org/carb_ice.htm.

Bob Gardner
"NW_PILOT" wrote in message
...

"Bob Gardner" wrote in message
...
Glad to hear it...too many pilots fly over water without them. I've
flown
the Astoria-Crescent City trip many times, staying within gliding
distance
of the beach. South of Crescent City there are many places where there
is
no
beach at all. For future reference, I have talked to CEC-based pilots
who
tell me that the fog can roll in mighty fast...racing them to the
airport.

Did you lean the mix when you pulled the carb heat on? Remember that
adding
carb heat richens the mixture and you should lean to compensate.

I was at cruise and yes I was leaned out as I always do at 2,350 rpm the
air
was very stable winds aloft were almost non existent it did not even feel
like we were flying, I was just reading a post on google about flying the
150 with a little bit of carb heat on if your in a moist airmass as the
150's carb's really likes to ice up any truth to this? is it wise to
cruise
with a little bit of carb heat on in the conditions I was in today?