Maybe a cht would help. I think the egt on a carburetor engine isn't much
help. I had a Westach 4 probe EGT on my C150 and found that it didn't help
any except to verify that standard look and listen method was working just
as well. I removed it to put a clock back in the hole. For sale if you
want to try it. BTW I did the Holly Run one year to Tangier Island and many
of the small planes with carburetors had to make the flight with carb heat.
I leaned the engine while using full heat. The engine went to TBO without
any burned valves.

Roger C-150E @ MD43


wrote in message
...
Matt wrote:
: Yes, I have been reading many great articles on avweb. Unfortunately,
my
: 152 does not have EGT or CHT monitors, so I have to use the "listen,
learn,
: and pray" method of leaning. I find it mentally difficult to reach over
and
: start easing the mixture back with the throttle full forward.

Yeah, I would be too. One thing you might be able to do to "calibrate
your
discomfort" would be to climb to an altitude where you cannot get more
than 75%...
like 8000' or so. Verify your power at 75% cruise and lean to best power.
Note the
mixture position. Linearly interpolate the mixture/altitude from that...


If it's your plane, I'd consider adding a cheapie CHT and EGT from
Westach.
They're not that expense and it lets you have more real information on
engine health.
Not really useful for cruise leaning, but good for a climb leaning and to
verify
non-roasted engine CHTs.

-Cory

--

************************************************** ***********************
* Cory Papenfuss *
* Electrical Engineering candidate Ph.D. graduate student *
* Virginia Polytechnic Institute and State University *
************************************************** ***********************