Page 32 - Aeronca 7A Interactive Service Manual

ENGINE INSTALLATION

GENERAL
Continental A65-8 A.T.C. 205. Horizontally opposed, four cylinder, air cooled with 3⅞” bore and 3⅝”
stroke. Total piston displacement is 171 cubic inches and compression ratio 6.3 to 1.

Rated horsepower at sea level, 65 h.p. at 2300 R.P.M. Recommended cruising 2150 R.P.M.

NOTE: Recommended cruising R.P.M. should be static or the maximum R.P.M. shown on the tachometer
when the engine is run up prior to flight with carburetor heat off.

OIL REQUIRED
Warm weather S.A.E. #40
Cold weather S.A.E. #30

Oil pressure 10 – 35 pounds per sq. inch
Oil temperature Minimum – 120 ° F
Maximum – 220 ° F

CARBURETOR
Stromberg N.A.–S3A1

FUEL REQUIRED
73 octane

FUEL CONSUMPTION
4.25 U. S. gallons per hour
3.52 Imperial gallons per hour

IGNITION

Bendix, Scintilla or Eisemann magnetos. Champion C-26 spark plugs.

FIRING ORDER

1 – 3 – 2 – 4

SPARK ADVANCE

30° B.T.C. with both magnetos. Left magneto (Number 1 mag.) fires lower spark plugs, right magneto
(Number 2 mag.) fires upper plugs.

MOUNT
Attachment of engine to fuselage is provided by the engine mount assembly, fabricated of 1010, 1025 and
X4130 steel tubing engineered to lessen vibration transmission to the fuselage. Four AN bolts attach the

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