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TOPIC: Low RPM on C-85 engine on 415-C

Low RPM on C-85 engine on 415-C 18 May 2017 13:15 #940

  • Steve McNew
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My favorite is Derk Kingrey, listed in this publication. His address is Brookville, but the shop is at Hartzell/Piqua. You could also try the guys down at Middletown, at Hook field, via Kurt Yearout, at the old home of Skyport. The mechanics are still there. Steve 5/18/17 This email address is being protected from spambots. You need JavaScript enabled to view it.
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Low RPM on C-85 engine on 415-C 18 May 2017 09:28 #939

  • Lowell Sterchi
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Have your TAC checked to see if it is OK. Even new ones have been known
to be off up to 200RPM.....have been there!!!
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Low RPM on C-85 engine on 415-C 13 May 2017 23:37 #931

  • Arlan Allen
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The Type Certificate Data Sheet E-233 shows maximum continuous power and take off power to be the same 85hp at 2575rpm for the C85-12. There are a few other models that have a 5 minute limit for take off of 87hp at 2600rpm. I believe these are all the fuel injected models.
Alan Allen
N3989H
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Low RPM on C-85 engine on 415-C 13 May 2017 03:08 #930

  • Edward Moore
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Bill:
WOW - I can't believe your engine is still together - or your tach is grossly wrong. Spec for
C85 is 2575RPM with a max of 5 minutes @ take-off - which gets the 85 brake horsepower. May call you later today. First thought you had a typo but then you were consistent with wrong most significant digit.

Edd
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Low RPM on C-85 engine on 415-C 12 May 2017 13:51 #929

Need help. My Ercoupe 415-C has a C-85 engine. The specs call for the engine to turn 5575 max RPM. Mine will turn only 3500 to 4000 max at full throttle at 1500 MSL. This max is approximately what specs call for on the C-75 engine. I have done the following.
Carb rebuilt to proper specs for C-85 engine
Have new prop 7150 pitch (cruise prop)
Engine compressions all mid 70's
Mixture line checked to ensure carb can be opened full
Exhaust checked
air intake checked

My plane has the 2 15 gallon wing tanks, no header tank. Carb set for fuel pump supply rather than gravity feed.
Can anyone help or give me a Shop who knows Ercoupes that I can call . OHIO
5/12/17

Thanks

Bill James
330 495 6041
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