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Bob:: You are comparing apples and oranges: I don't know where you obtained the "original manual" specifications, but they sound like the numbers for a 415 D, E, or G with a 72.5 to 74 inch prop and 75 HP. Sensenich propeller M76AK-2 You have an ALON 90 hp with a Mc Cauley prop 1A105/SCM 7153 with propeller length of 69 to 71 inches. The ultimate authority is the Type Certificate A-787, the "Original Manual" might be somebody's reprint, if I still had trouble I would get a second opinion. Good luck Wayne Woollard 6596Q ----- Original Message ----- From: <[EMAIL PROTECTED]> To: <[email protected]> Sent: Tuesday, April 22, 2003 10:24 AM Subject: [COUPERS-FLYIN] Re: Digest list: Ercoupe Hangar Flying > ----[Please read http://ercoupers.com/disclaimer.htm before following any advice in this forum.]---- > > > Hartmut: Thanks for the reply. The prop is a McCauley CM7150 The mechanic checked it out last night and we can't seem to find anything. Plugs check good (Clean, no oil etc.) Mag drop is right, Carb heat is correct . All carb settings seem to be correct and we still can't get over 2200 RPM > What really has me stumped is the origional manual states a static RPM @ 2175 to 2275. The Type certificate #TC A-787 states for a IB90CM on the A2 Coupe the static RPM at 2250 to 2375. WHY THE DIFFERANCE !!!!!!!! > I talked to McCauley and they told me that it should be someware in the top part of the RPM range per the Type Certif. > Bob Bullock > N5621F > Maryland > ========================================================================== == == > To leave this forum go to: http://ercoupers.com/lists.htm > Search the archives on http://escribe.com/aviation/coupers/ > > > > > ========================================================================== ==== To leave this forum go to: http://ercoupers.com/lists.htm Search the archives on http://escribe.com/aviation/coupers/
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