Model Tech SE5a SCOUT Instructions For Final Assembly page 17

STEP 1: INSTALLING THE ENGINE MOUNTING BEAMS
IMPORTANT When installed, the engine mounting beams are spaced to fit the Magnum XLS .40 - .52 size two-
stroke engines and the Magnum XL .52 - .61 size four-stroke engines. If the width of the engine you choose is not the
same, you will need to modify the spacing of the beams. This can be done by removing the blind nuts and gluing pieces
of hardwood dowel into the existing holes. You can then redrill the holes to fit your engine's width and reinstall the blind nuts.
STEP 2: ALIGNING AND INSTALLING THE ENGINE
Slide the propeller onto your engine and secure it into place, using your engine's propeller washer and nut.
Using a pencil, carefully mark the locations of the engine mounting holes onto the mounting beams.
Remove the engine and drill 5/64" diameter pilot holes through the engine mounting beams at the marks you drew.
IMPORTANT Be careful that you drill the holes straight down and not at an angle.
Carefully enlarge the 5/64" diameter pilot holes, using a 1/8" diameter drill bit.
Firewall has right thrust
Install the two engine mounting beams onto the firewall,
built-in. This is normal
and by design. This is
using four M3 x 18mm socket-cap screws and four M3 flat
the reason the engine
mounting beams are
washers. Tighten the screws firmly to hold the beams securely
mounted off-center.
in place.
firewall to thread the screws into. We suggest applying Blue
Threadlocker to the screws to secure them into place.
IMPORTANT
Set the engine onto the engine mounting beams.
Using a ruler, measure the distance from the firewall to the
back of the propeller hub. Adjust the depth of the engine so
that the measurement is 4-3/4".
IMPORTANT
hub be 4-3/4" from the firewall so that the cowling will
line up properly when it's installed later. Do measure to the
front of the propeller hub.
Install the engine using four M3 x 25mm socket-cap screws,
eight M3 flat washers and four M3 lock nuts.
securely into place.
17
Blind nuts have been preinstalled into the back of the
The engine is mounted upright.
It's important that the back of the propeller
Tighten the screws and nuts firmly to hold the engine