Recently
we had a problem with our 582LC demonstrator, caused by oil starvation.
Kitfox builders who have engines with oil injection systems should note
the following precautions:
Item
#1. The E-85 inline oil filter should be positioned as near the oil tank
and firewall as possible, away from the engine. This will greatly reduce
vibration of the filter especially during start-up and shut-down, and
reduce the likelihood of the oil line separating from the filter. Check
the oil line and clamps during each pre-flight inspection for leaky
connections, cracked lines, or loose clamps.
The
filters supplied with the 582LC engine kits to date have a 1/4” nipple
on one side but the nipple on the opposite side is of smaller diameter.
We will be sending a filter with 1/4” nipples on both sides to every
582 equipped KITFOX owner who purchased 582LC Engine Kit from Denney
Aerocraft Co. Replace the old style filter with the new as soon as you
receive it. The 1/4” tubing will not properly fit the smaller nipple.
Item
#2. Before you run your engine, and any time you disconnect the oil line
for any reason, vent the air from the oil line. Refer to the Rotax 582LC
Operators Manual, pages 15 and 16, for complete instructions, and Fig. 2
on page 16, which shows the location of the vent plug.
As
an added precaution, if the oil pump may have lost its prime for any
reason, you should premix 2-cycle oil with the next tank full of fuel to
ensure the engine is oiled in case the oil injection pump does not
supply oil. Monitor the oil level in the oil tank to confirm that oil is
being used.
Item
#3. The oil injection pump metering lever is actuated by a cable
connected to the throttle reversed Bellcrank. You can secure the sheath
ends of this cable into the sockets with silicone caulking. Use silicone
caulking also to secure the ends of the throttle cables.
Item
#4. Your pre-flight inspection should include a thorough inspection of
the oil injection system. Check the ends of the oil injection control
cable and of the throttle cables to see that the cables are not buckled
and the sheath ends are secure in their sockets. Check the oil level in
the tank and check the line and in-line filter. We strongly recommend
that you fit a small door in the top cowl so it will be more convenient
to check the oil level in the tank and add oil. We have this Oil
Refill Access
Door Kit available
Part #K1145 for $30.00.
Summary
- The
Rotax 582LC in our experience has been a very reliable engine and the
oil injection pump may be the most reliable part of it. We have never
had a problem with the pump and none of our builders have reported
problems with it. We had problems with oil starvation because we did not
properly care for the supply system to the pump. The purpose of this
letter is to help you avoid similar problems.
Ultralight
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