Crosley Engine Specifications

This is actually the second specification for the Crosley engine used in the M-18. The first, dated August 17, 1948 differs only in that there is no reference to the CC46M-2A engine, and therefore has no Note 5.
DEPARTMENT OF COMMERCE CIVIL AERONAUTICS ADMINISTRATION WASHINGTON	E-255-2 MOONEY CC46M-2 CC46M-2A October 7, 1948

Manufacturer	Mooney Aircraft, Inc. 6301 E. Harry Airport Post Office Wichita, Kansas
Model Type Reduction ratio (belt drive) Ratings Maximum continuous, BHP-RPM-Sea Level Take-off, BHP-RPM Fuel (minimum octane aviation) Bore and stroke, inches Displacement, cubic inches Compression ratio Weight (dry), lbs. (includes generator) C.G. location Fwd. of left rear mount, inches Above left rear mount, inches Propeller shaft Carburetion Ignition, Dual (battery) Ignition timing, °BTC Spark plugs Oil sump capacity, qts. Coolant capacity (engine only), qts. Coolant NOTES Certification basis Production basis	CC46M-2 4LW .500:1 25-3900-S.L. 25-3900 80 2.5 x 2.25 44 8.2:1 101 7.7 3.7 Integral flanged hub Six 3/8 bolts, 4 inch circle Tillotson DY-9B carburetor (Mooney No. E-251) Delco-Remy X-20010 distribution (Mooney No. E-273) Delco-Remy 1115378 ignition coil ( " " E-388) Auto-lite GAS-4190 generator ( " " E-338) Left 6, Right 8, below 1200 RPM Left, Champion J10 Right, Champion Y4A 2 1/4 1.8 40% min. AN-E-2C, Prestone, or Zerex, remainder water A, 1, 2, 3, 4 Type Certificate No. 255 None (See NOTE A)	CC46M-2A - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - A, 1, 2, 3, 4, 5

NOTE A.

NOTE 1.

NOTE 2.

NOTE 3.

NOTE 4.

NOTE 5.

The manufacturer does not hold the production certificate for the production of engines under this type cerificate and, therefore, each engine so produced is subject to a detailed inspection for workmanship and conformity with the approved data be a Civil Aeronautics Administration Inspector. In addition, the engine must have a satisfactory run-in including 5 hours at rated power and speed. Upon satisfactory completion of the above, the inspector will tag the engine with Tag Form 186.

Maximum permissible temperatures:

     Cylinder head (at plug)                            500°F
     Coolant outlet                                            190°F
     Oil inlet                                                        200°F

Pressure limits for normal operation:
                                                                  Min.     Max.
     Oil inlet, psi                                          40         55
     Fuel inlet to carb., psi                          2           2.5
     Coolant inlet, psi                                  *           7

          * Coolant flow 10 gal./min. minimum at 3900 engine RPM

The following accessories are eligible at the indicated additional weight:

                                                                   Weight, lbs
          AC No. 1538923 fuel pump
               (Mooney part No. E-272)                  2

A shield must be provided for the propeller shaft driving belts to prevent their contact with water, other liquids and foreign substances of all kinds.

Model CC46M-2A differs from model -2 in that numerous changes in detail design have been incorporated in the cylinder block, and other parts. The external changes include relocation of oil filter, breather, fuel pump and left spark plug boss.