Power settings for IO540 in M7

[Maximus]

Where can I find the 65% and 75% power setting graphs for the IO540? Of course everyone says it should be in the POH but there's very little, if any information there. My next step after this was to pay for a Lycoming operators manual on line. I'm just sold my M4 and am learning my new M7 and loving it!

[maules.com]

You have to have a Lycoming Engine Operators Manual anyway so it is best to order it from Lycoming. About $40 and money very well spent.
There is a lot of information in it if you really want to know about your engine and how to efficiently operate it, plus make it last.
Every Maule is sent from the factory with one and the fact that so many used Maule transfers take place without it indicates that the first owners are hanging onto the manual.
Safe flying with the new to you M7.

[Maximus]

Thanks Jeremy, I will see if the previous owner stilll has the manual, if not I will get a new one. Another member suggested I could download one free on-line but I have not been able to find this link.

[a64pilot]

The charts in the manual are hard to read at best. I called the help desk long ago and they sent me some spreadsheets indicating 65% and 75% power at different altitudes, corresponding fuel flows etc.
Surprisingly 22 squared for example is a different power level depending on altitude. I thought being the same manifold pressure and RPM, that the power output would be the same regardless of altitude, up to the point of course that you couldn't make 22" manifold pressure.
I'd root them up and send them to you, but unless your 540 is an IO-540W1A5D, they wouldn't do you any good.
There is a lot of valuable other data in the engine manual, I'm surprised it's not required to keep in the airplane along with your W&B and POH.

[TomD]

Interesting flyer:
http://www.lycoming.textron.com/support ... ations.pdf

Here is a source for the manual:

http://www.chiefaircraft.com/airsec/Air ... oming.html

[aero101]

I would suggest you buy the manual direct from Lycoming as it's engine model specific whereas the Chief Manuals are not? You can order directly from the Lycoming help desk for about the same price...

[TomD]

Actually the Chief manuals are engine specific:

The LYC 60297-10 is the current edition of "Operators Manual, for O-540, IO-540, HIO-540"

Click on the photo icon and it looks exactly like the one I got from Lycoming except it is a newer edition.

TD

[maules.com]

The recent manuals from Lycoming are larger format than the older pink books.
The graphs are much easier to read.