Edge 540 Manual - Hangar 9

Section 12: Installing the EngineParts Needed• Fuselage• Metal motor mounts• Mounting hardware• Engine• Spacer Plate (If using MDS 1.48)Step 1. Mix approximately 1 ounce of 30-minute epoxy and anequal amount of rubbing alcohol. Brush the mixture on thefirewall (and spacer plate) to seal it to make it fuelproof. Allowthe epoxy to cure completely.Step 2. Locate the two metal motor mounts and associatedmounting hardware. Note the motor mount screw holes areshaped like slots in the firewall. This is to allow moving themotor mounts closer or further apart so engines of differentwidth crankcases can be mounted. Note also that the motormount can only be installed so the engine cylinder faces to theright side of the aircraft, as seen from the cockpit of the model.Tools and Adhesives Needed• Phillips screwdriver• 30-minute epoxy• Rubbing alcohol• Epoxy brush• Mixing stick• Paper towel• Locktite ® Z-424 nuts provided. Adjust the distance between the metal motormounts until the engine crankcase fits the motor mount. Checkthe metal motor mount position on the firewall, making sure themounts are parallel to the bottom of the firewall. Once the properdistance between the motor mounts is determined and they areparallel to the bottom of the firewall, tighten the bolts mountingthe motor mount to the firewall securely. A drop of Locktite Z-42on the bolt threads will help prevent loosening in flight.Step 5. Position the engine along the metal motor mount untilyou measure 6 1 /4” from the firewall to the front end of the propdrive hub.Note: If a shorter engine is used, such as MDS 1.48, the3/8'' plywood spacer plate must be used behind themotor mounts.Once the engine is in proper position, tighten down the motormounting bolts securely. Again, a drop of Locktite Z-42 will helpprevent loosening of the bolts in flight. The engine should bepositioned so there is ample clearance in the cowling for thespinner backplate mounted to the prop drive shaft. If you removethe engine and reinstall it, make sure the engine is mounted at thedistance previously mentioned. Remember, the key distance is fromthe prop drive hub to the firewall.Step 3. Mount the metal motor mounts on the firewall using thebolts and washers provided. The blind nuts are installed on theinside of the fuselage. Do not over tighten the bolts at this time,as the width of the mount will vary with the size of the enginecrankcase used.Step 4. Trial fit your engine on the motor mount by mounting itloosely to metal motor mount with the 4 bolts, 8 washers, and29