Hello everyone!

Alright so i just purchased the sd 50 from the LHS, i am having some trouble with it here are my specs

Sundowner 50
TX - DX7
RX - AR7000
Servos - 2-JR126MG for tail controls 2-DS821 for aileron and 1 Hitec for the throttle
Engine and Muffler - OS55 with w/ bison pitts muffler
prop: 13x6
fuel and glow plug: Power Master 15% MG and #8 plug

So here is my problem, i just finished fully assembling the plane and am having trouble breaking in the engine according to the OS intruction booklet
The instruction booklet says to turn the needle out 2.5 turns from close and run the engine at full throttle for about a minute

This is how i start the engine and what my problems is

1) prime engine
2) apply glow plug igniter to glow plug
3) use electric starter to start motor
4) motor starts
5) I unplug the glow plug igniter
6) i try to increase throttle to full, engine dies
7) I made it more rich according to instructions yet the motor still dies

I have notiuced that if i keep the glow plug igniter attatched, the motor idles very well and goes up to full throttle!,
as soon as the plug is out it has trouble maintaining idle or throttling up, I have tried a richer setting but it does not maintain idle very well

Any help or tips are appreciated!

-Alti-