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Troubleshooting the Rotax line of two stroke ultralight aircraft engines.
Troubleshooting the Rotax line of two stroke ultralight aircraft engines.
UltralightNews.com
red.
ON THE LIQUID COOLED 532 ENGINE, the coils are wired PTO side 1 to ground, 15 to points, Recoil (Mag side) 15 to ground 1 to
points. P On the 532 the ignition suppressor box is wired BLACK TO RED, AND
RED TO BLACK.
During regular preflight it is recommended that the pilot check the ground
wires, and the bolts retaining the coils to the engine. The pilot should be
looking to see whether the bolts have loosed off, which could result in a coil
falling off, or ground wire loosing ground, or to see if the ground wire, where it
enters the connector used to retain it to the bolt, is broken or frayed.
This is caused by the air turbulence around the wire causing bending it back and
forth, which over a period of time results in failure of the end where it
connects to the wire. We suggest installing silicone over the wire to prevent
this. If a coil is removed for any reason, or the retaining bolts are found to be loose,
they must have LOCTITE (purple 222 loctite) when reinstalled.
To simply retighten them is asking for problems, since these are self threading bolts, and generally pull threads when they back
out. DO NOT USE RED LOCTITE or you will not be able to remove the bolts without destroying the thread hole.
Troubleshooting the Rotax line of two stroke ultralight
aircraft engines.
Another problem that has cropped up from time to time is the incorrect installation of the
ground and magneto wires on the two poles on the ignition coil, on the points equipped
engines.
On Rotax engines these wires are locate on opposite sides of the coil, for each cylinder. They
are numbered 1 and 15.P On air cooled Rotax engines/B the coil should have the ground wire
going to 15 on the PTO side and the magneto points wire going to the 1,
The recoil (mag side) side cylinder should have the ground wire going to the 1 and the
magneto point wire going to the 15.P The ignition suppressor box on the air cooled Rotax engines is wired black to black, and red to
Silcone Here
Broken wire
Blue Loctite
