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Conversion of C75-12F to C85

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19 Apr 2017 19:17 #13 by Kevin Gassert
Replied by Kevin Gassert on topic Conversion of C75-12F to C85
The part numbers are 40487L, 40487R and 40488 and yes these are applicable to all C85 engines but not required on all C85 engines. The parts book is a list of applicable parts not a list of required equipment. The TSDS is and it only requires those baffles with the Beech prop.

Kevin

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  • Arlan Allen
19 Apr 2017 18:02 #14 by Arlan Allen
Replied by Arlan Allen on topic Conversion of C75-12F to C85
The Ercoupe Parts Manual calls for 3 baffles each with it's own part number. All models with C-85 engines. I will dig out the part numbers and post them.

Arlan
N3989H
415CD SN4690

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09 Apr 2017 07:34 #15 by Kevin Gassert
Replied by Kevin Gassert on topic Conversion of C75-12F to C85
The extra baffles are only required with the Beech controllable prop.

Kevin
The following user(s) said Thank You: George Sellers

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  • Arlan Allen
09 Apr 2017 00:06 #16 by Arlan Allen
Replied by Arlan Allen on topic Conversion of C75-12F to C85
A couple of engine baffles also need to be added.

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04 Apr 2017 13:23 #17 by Kevin Gassert
Replied by Kevin Gassert on topic Conversion of C75-12F to C85
The wide trim tab is not required. A trim tab is required but either the 3/4 inch o1-3/8 is acceptable.

Kevin
The following user(s) said Thank You: George Sellers

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11 Mar 2017 10:51 - 11 Mar 2017 10:52 #18 by George Sellers
Conversion of C75-12F to C85 was created by George Sellers
I understand that to convert my C75-12F to a C85 hp the main thing that needs to be done (besides having the correct prop) is the following:

The carb need to be changed to a 1 3/8 venturi and the metering jet to a #45 size jet.
22031-4 TRIM TAB PLATE - 1 3/8" WIDE (Required for C-85 Engine)

Have any of you had that done? If so, how do you like it? What are things to consider? Etc.

Thanks--George
Last edit: 11 Mar 2017 10:52 by George Sellers. Reason: Correct name spelling!!!
The following user(s) said Thank You: Dennis Oakman

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