Getting ready to start and break-in my Evolution .46NT I know the high speed adjustment is the one on the rear of the engine. On the front there seems to be three adjustments,
(1) a screw with a lock nut near the air intake,
(2) mounted on a blue ring is a small peg that adjusts about 90 deg. Before it hits one of the two stop tabs,
(3) there is a small flat head screw inside the blue ring.
What are these and how do you adjust them?

The last one is most likely your low speed needle. Leave it alone for now. One of the other is most likely your throttle stop adjustment. Someone else may have more information on the other one.

For now, your most important one is the high-speed needle adjustment, the one you have already identified.

Didn't the engine come with a manual?

Have you run the engine at all?

CGr.

bought it used but NIB from RCU

Wzak,

My suggestion would be to find someone that is experienced to help you on your first try in tuning your engine.

The screw with the lock nut is used to adjust the travel of the carb barrel and in most cases also serves as its retainer.

The blue ring with the pin is a stop limiter for the low speed adjustment this is often a problem in getting the engine adjusted if the factory setting is not correctly set within the limited movement offered by the pin stops. It often has to be removed and repositioned in order to properly set the low speed needle.

The screw inside the blue ring is the low speed adjustment needle which needs to be adjusted to where the engine transitions from low speed idle to full power smoothly without bogging or quitting. If it bogs before coming smoothly up to power its too rich. This is most often accompanied with a great deal of engine exhaust. If the engine is too lean it will quit when the throttle is opened quickly for full power.

An easy test called the "pinch test" used while the engine is running after the high speed needle adjusted with the speed at idle pinch the fuel line to the carb closed. If the engine speeds up the mixture is too rich. If the engine quits its too lean. Make small adjustments about an eighth of a turn at a time. It may require removing the blue ring with the pin in order to make the proper adjustments.

Hope that helps.

Ok. So you personally have not run it and you are pretty sure it's never been run. That's what I got out of your reply, which is fine. I'm just trying to set my reply by if the engine has ever been run before and if the high speed needle is ok where it is.

This is an Evolution engine. I am assuming that it has those stops on the needle valve preventing you from getting it to lean or to rich.

Probably the best thing to do is rotate the high speed needle to the center of these two stops. This should get you in the ball park for starting the engine the first time.

Next, fill the tank with fuel.

Without the glow driver on the glow plug, put your finger over the carb inlet (this is a "choke" action) and rotate the prop a full five turns, or until you see fuel flowing in the tube to the carb.

It should be sufficiently primed at this point.

Connect your glow driver.

Stand clear, make sure no wires or clothing are in the way of the prop, and give it a good flip counter-clockwise (looking at it from the front). After a few flips, it should start. If you have an electric starter, go ahead and get it going using the electric starter.

Get behind the plane.

Once it starts, let it sit there with the glow driver attached for a little while, perhaps 30 seconds or so, then slowly increase throttle and advance it to full. I hope you have this plane secured somehow so it doesn't run away from you. Bring it back to idle after a few seconds at full and disconnect the glow driver. It should be warm enough now. Or, you can leave it attached for the break in.. your choice. Leaving it attached helps prevent it from shutting down while running it rich.

Now, you never said if you have a manual or not. If you do, follow their break-in process for that engine. It normally takes a few tanks of fuel to get it to run right unless it was previously broken in.

If you don't have a manual, well, we can walk you through that too.

CGr.

Hi Steve! How are ya? I'm over in Bradenton for the weekend.. fly back tomorrow.

Dick.

this engine has never been started and I have never started one

BUT.. do you have a manual?

no manual

Hey CG, sent you a PM but went to the wrong person. Debating if I should run out to the field before the rain starts. Been a terrible week for flying.[&o][&o][&o]

Go to this link and download the manual. The link is in the middle of the page "Evolution 46NX manual"

I would recommend you read it thoroughly and get the idea of what does what on that engine.

CGr

http://www.horizonhobby.com/Products...rodID=EVOE0461

Not sure if it matters but this is the manual for the 46 nt engine,

http://www.evolutionengines.com/Prod...nualUpdate.pdf

Doing fine Dick!

Glad to see you made it to Florida for a few days. Been pretty windy over here so there's not much going on at the flying field. Hopefully you can make it down to fly with us sometime soon.

Have a safe one back to the Garden State!

Steve

wzak, The low end adjustment is the last thing to mess with. Get the engine running first.

That said, the screw inside the blue collar is the low end adjustment. The blue collar is a limiter that is attached to the low end adjusting screw - It is designed to keep you from turning the low end screw too much.

That said, there are some Evos that were not set up properly. But don't worry about that right now, just get it running right and get help doing it.