Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum
has been the industry's standard dummy text ever since the 1500s, when an unknown
printer took a galley of type and scrambled it to make a type specimen book. It has
survived not only five centuries, but also the leap into electronic typesetting, remaining
essentially unchanged.
Troubleshooting the Rotax line of two stroke ultralight aircraft engines.
UltralightNews.com
Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has
been the
industry's
standard dummy text ever since the 1500s, when an unknown printer took a galley of type and
scrambled it to make a type specimen book. It has survived not only five centuries, but also
the
leap into electronic typesetting, remaining essentially unchanged.
Troubleshooting the Rotax line of two stroke ultralight
aircraft engines.
An added factor is rust forming at the exhaust manifold and muffler joint, thereby making this a solid joint rather than a flex joint.
The solution is to coat the ball socket with an asbestos silicone available through your nearest Rotax engine service centre.
Another cause is the way the exhaust is mounted, in many cases it is mounted
solid, and this causes excessive vibrations and wear leading to breakage,
change your mount so the system is rubber mounted and allowed some
flexibility.
The baffle problem has been eliminated, in most recent exhaust models, but
was a problem in early models, the solution is to open up the canister and
reweld the baffle back in, or buy a new exhaust.
Streamline Exhaust Spring replacement kit shown here on Rotax 503
The third problem with the exhaust spring mounting tabs is to reweld the tabs so that
the springs pull straight not at an angle, and also so that the distance between the two
tabs is just enough to tension the springs.
It is also recommended that these springs be safety wired, and that a bead of high
temp silicone be run along the spring coils, this prevents a harmonic vibration from
setting up and also aids in preventing the spring from separating, if it breaks.
Troubleshooting the Rotax line of two stroke ultralight aircraft engines.
Rotax Ultralight Aircraft Engine Recoil Troubleshooting:
A commonly reported problem is with the Rotax recoil. Pilots have reported the recoil handle,
and rope backing out of the recoil housing during flight.
In a pusher configuration this can lead to the hand becoming engaged in the prop. This
problem although widely reported is not a problem that happens overnight, in most cases the
pilot has noticed for some time that the recoil rope is not going back up immediately after
starting the engine, or that he has to pull the handle back and forth several times to get it to
go back in.
Usually a good cleaning of the recoil mechanism will cure this problem.
A stronger spring is also available, and is recommended if your recoil rope is a longer length
than normal, to allow for in cabin starting.
One other reported problem with the recoil is the breaking of the housing, where the rope enters the housing, and in a circle about 4
inches in diameter in the center of the housing.
Both can be identified prior to complete destruction by looking for cracks in these areas.
