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High quality aluminum headers for the 40F3A and 40RE are now available from JMB in the Czech Republic in three different drops, 0mm, 25mm and 50mm.  Header pipes are 20mm in diameter, 7” long and include a 3 degree offset on the mounting flange to keep the outlet centered in the fuselage when right thrust is incorporated.
Displacement 40cc/2.4 ci
Bore 38mm/1.5"
Stroke 35mm/1.38"
RPM Range 1200-7800 RPM
Power Range 4.25hp
Weight 2 lbs 7.5 oz bare w/plug 2 lbs 11.5 oz w/ ignition
Fuel/Ratio Premium Gas mixed 40:1
Piston Rod 2 Needle Bearings
Crankshaft 2 Ball Bearings
Ignition ZDZ® 4.8v-9v Electronic Microprocessor Controlled
Porting 3 Channel Schunrle
Prop Size 2 blade 20x10-12, 22 x 10

Are you looking for a gasoline engine for your beautiful pattern airplane? Tired of guzzling expensive glow fuel? Looking for MORE power? Then look no further. The ZDZ® 40RE F3A is the newest addition to the ZDZ® 40cc engine lineup. This engine has been specifically designed for pattern flying and uses the proven Walbro WT 201 carburetor. The dedicated ignition system has been specially programmed for easy starting, smooth low speed operation with excellent transition characteristics and power throughout its entire RPM range.

ZDZ engines have rotary valves*. This is one of the main reasons for the incredible throttle response of ZDZ RC gas engines. Most engineering experts agree that the rotary valve has brought the two-cycle engine its highest degree of efficiency and performance.

*ZDZ 80 R2, 100 R2 and 420 B4 have reed valves

Some key features are:

  • lightened prop hub
  • lightened backplate assembly
  • lightened crankshaft and piston
  • special combustion chamber design
  • new spark plug retainer cup design
  • specifically designed for tuned pipe applications

Headers in 3 different drop ranges will be available very soon.

Our first shipment of these engines has finally landed and we are now shipping!

Engine with Electronic Ignition $600.00

JMB header - 0, 25 or 50mm Drop

 $35.00 each

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Recommended Starting Procedure
for ZDZ Engines

 All ZDZ engines that use a rotary valve with fixed induction timing must use a unique starting procedure as compared to their piston ported or reed valve inducted counterparts.

 The starting procedure described below is most commonly referred to as the “5, 5 and 1” method. It is the preferred way to start a ZDZ engine once the carb has been primed.
For brand new engines, a richer low speed needle setting of approx. 2-1/2 turns out is required for initial fuel draw.

Step 1
 With the Choke completely closed and the Ignition system OFF, advance the throttle to full open, Flip the prop smartly 5 times.

Step 2
 Open the Choke completely, Leave the ignition system in the OFF position, leave the throttle at full open, and flip the prop smartly 5 more times.

Step 3
 Reduce the throttle completely and advance the trim to a mid to high setting, turn the ignition system ON, 1 smart Flip and the engine will start!




ZDZ® is a registered Trademark of RC Showcase, Inc.