Franklin / PZL Model 4A-235-B31
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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.
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Engine Specifications
General:
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Model
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4A-235-B31
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FAA
Type Certificate No
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E6EA
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Rated
Horsepower
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125
/ 116 @ 2800RPM *
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Number
of Cylinders
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4
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Displacement
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235
Cu. inches
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Bore
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4.625
Inches
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Stroke
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3.5
Inches
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Engine
Weight (Dry - Without Accessories)
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206
lbs.
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TBO
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1500
Hours
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Ignition:
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Magnetos,
Slick
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Model 4392
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Magnetos, Bendix
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S4RN
- 20 / 21
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Ignition
Timing, BTC, Both Magnetos
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32
degrees
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Firing
Order
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1,
4, 2, 3
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Spark
Plugs
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18mm
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Fuel
System:
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Carburetor:
Marvel Schebler
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MA-3SPA
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Fuel
- Minimum Octane - Aviation
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100/130
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Lubrication:
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Wet
Slump - Oil Capacity
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6.6
Qts.
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Oil
Grade, Above 41 Degrees Ambient Air
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SAE
40
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Oil
Grade, Below 41 Degrees Ambient Air
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SAE
20
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Valve
Clearance:
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Valve
Rocker Clearance With Lifters Bled Down And Engine Cold
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0.0360
- 0.044 inch
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Operating
Limits:
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RPM
- Maximum Limit
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2800
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RPM
Idle
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750-950
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Cylinder
Head Temp (Bayonet Thermocouple)
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392F
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Oil
Temperature - Maximum Inlet
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234F
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Oil
Pressure - Operating Range
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50-80
PSI
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Oil
Pressure - Idle
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25
PSI
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Fuel
Pressure (Carb. Inlet)
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2.2 - 7.3 PSI
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