Horizon Hobby Evolution Radial Glow E777 Manuel D'instructions page 11

Evolution Blue Block After-Run Oil has been proven to provide long term protection against
corrosion when applied immediately at the end of the flying day. Even waiting overnight
before applying after-run oil will greatly increase the chances of corrosion within your engine.
Take care of your investment. Please do not believe the claims of the fuel companies that
claim "No need to use after-run oil". They don't own your engine!
3. Occasionally, you will need to adjust the valves. Adjust the valves the first time after one
hour of engine run time. After the first hour, monitor the valve lash and adjust the valves
as needed. Adjust the valves when the engine is cool. The lash is set at 0.1mm–0.25mm
at the factory.
Evolution Radial Valve Adjustment Guidelines
1. Place the engine in a position (on or off your airplane) that allows you easy access
to the valves on all the cylinders.
2. Remove the glow plugs from all the cylinders. It is much easier to determine Top Dead
Center (TDC) without the compression caused by installed glow plugs.
3. Attach a propeller or other turning device (such as a short block of wood with the
appropriate hole for the crankshaft) to the crankshaft and tighten it so you can easily
rotate the crankshaft throughout this process.
4. Start with the number 1 cylinder (this should be the upright cylinder above the
Evolution logo).
a. Rotate the crankshaft counter-clockwise and observe the pushrod movement.
b. Note when you see the exhaust and then the intake pushrod move up to open
the valves. This will occur during one rotation of the crankshaft.
c. When the piston reaches the top of the cylinder during the next rotation,
you are at the TDC of the compression/firing stroke.
d. Position the piston at TDC of the compression/firing stroke. It is helpful to place
a short piece of wooden dowel. (Don't use steel, as you can mar the inner surface
of the cylinder.)
5. Use a feeler gauge to check the valve lash between the rocker arm and the top
of the valve.
a. We recommend setting the valve lash as close to 0.1mm as possible. If the valve lash
is between 0.1 and 0.15mm (.004–.006"), you do not need to adjust the valve lash.
The settings for the intake and exhaust valves are the same.
b. Adjust the valves by loosening the locking nut and adjusting the screw until you can
just feel the drag of the .1mm (.004") feeler gauge as you pull it between the valve
and rocker arm.
c. Tighten the locking nut and recheck the valve clearance. Sometimes when tightening
the nut, the adjustment will change slightly.
6. Because the cam gear of our engines is a shared cam gear with all the cylinders and
rotates at a 1:6 ratio, there are actually 6 different positions on the cam gear that need to
be checked. Repeat step 4 & 5 above four more times to check each of these positions. If
you find that the valve lash is smaller, readjust that valve. If it is greater, do not readjust
the valve. A little loose is safer than too tight.
7. Now move onto the next cylinder in an counter-clockwise directions and repeat steps
4 through 6. Do this for all cylinders.
Congratulations. You have now completed the valve adjustment process. This
maintenance should not be required again for another 10 hours of running time.
EN
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