ORIGINAL: opjose
ORIGINAL: Showtime100
The landing was smooth and was done by my instructor. I live about 40 miles from my instructor/field and I won't see them until next week. Hoping to figure this out prior to flight night so I don't waste valuable training time on engine issues. The clunk moves around freely. It seems this engine has not run correctly from the start as my instructor and another guy had to fiddle with it a lot last week before flying. It seemed to be ok after that during flight. Afterwards I drained the remaining fuel and went home. Now it does this. My other new Evo .46nt has been awesome. Always starts on the first flip of the prop and runs smoothly.
I will look into the needle limiters although I am not sure what I need to remove. By the name I assume it is the stoppers on the needle valves that keep it from turning further.
The engine has BLUE anodized aluminum collars on both the high and low speed needles.
The collars have a black metal pin.
The Collars are secured with a small hex grub screw.
Loosen the grub screw and pull the collar straight up. If what I describe has happened, this may be difficult to do.
Once the collars are off, remove BOTH the high and low speed needles.
Before you do so make sure you COUNT the number of 1/2 turns you can screw the needles in until they "bottom" lightly, with the engine at full idle position on the throttle. Write this down.
Now remove both needles.
Removing the high speed needle will now permit you to remove the friction clip.
Take it out and bend the tines in to provide MORE friction when you re-install the needle.
Put it back in all the way, then count the number of turns as you restore it to where it was.
On the low speed needle, take a microdrop applicator and apply Loctite BLUE to the threads.
Then screw the low speed needle back in fully, then back it out to where it was before.
This will prevent the low speed needle from "walking" as it tends to do, when the engine heats up.
DO NOT get Loctite on the grommets, only on the threads. While the needles are out, blow out any obstructions from the passageways and check for debris.