Franklin PZL Model 4A-235-B31

 

Franklin / PZL Model 4A-235-B31

 

The Franklin / PZL 4A-235-B3 aircraft engine was developed to be a higher power replacement for the Continental A-65 through 0-200 engine line. As a result, the Franklin engine will fit directly to an 0-200 engine mount, the exhaust system and carburetor mounts in nearly the same location and the cowling will usually still fit. The 4A-235 weighs within a few pounds of an 0-200 when the engine are comparably equipped, yet it is rated at 125 HP.

 

 

 

Engine Specifications

General:

 

Model

4A-235-B31

FAA Type Certificate No

E6EA

Rated Horsepower

125 / 116 @ 2800RPM *

Number of Cylinders

4

Displacement

235 Cu. inches

Bore

4.625 Inches

Stroke

3.5 Inches

Engine Weight (Dry - Without Accessories)

206 lbs.

TBO

1500 Hours

Ignition:

 

Magnetos, Slick

Model 4392

Magnetos, Bendix

S4RN - 20 / 21

Ignition Timing, BTC, Both Magnetos

32 degrees

Firing Order

1, 4, 2, 3

Spark Plugs

18mm

Fuel System:

 

Carburetor: Marvel Schebler

MA-3SPA

Fuel - Minimum Octane - Aviation

100/130

Lubrication:

 

Wet Slump - Oil Capacity

6.6 Qts.

Oil Grade, Above 41 Degrees Ambient Air

SAE 40

Oil Grade, Below 41 Degrees Ambient Air

SAE 20

Valve Clearance:

 

Valve Rocker Clearance With Lifters Bled Down And Engine Cold

0.0360 - 0.044 inch

Operating Limits:

 

RPM - Maximum Limit

2800

RPM Idle

750-950

Cylinder Head Temp (Bayonet Thermocouple)

392F

Oil Temperature - Maximum Inlet

234F

Oil Pressure - Operating Range

50-80 PSI

Oil Pressure - Idle

25 PSI

Fuel Pressure (Carb. Inlet)

2.2 - 7.3 PSI