Engine runs can't throttle down
 

Hey Guy's

Been away from the sport for awhile, finally built my Tequila Sunrise 25 after 2 years. My first ARF. I have installed the biggest engine for this model a 28 Magnum XL,
I'm having problems with throttling down, I set the high speed Jet or needle with full throttle on works great then when I want to throttle down shuts off.
any help much appricated



many thanks


John T

RE: Engine runs can't throttle down
 

I'm not exactly familar with the 28 magnum, but most glow engines have either two needle valves (high-speed and low-speed) and one needle valve and an air bleed. The larger needle valve is for the high speed. The low-speed NV (or idle NV) is often located inside the throttle barrel and must be accessed with a very small striaght-bit screwdriver. You are probably too lean on the low speed NV. If your engine has an air-bleed, then this is used to adjust the idle mixture.

RE: Engine runs can't throttle down
 

DON'T mess with the low speed yet, that usually makes more problems then you have now. Readjust your throttle control linkages, and set your trim lever so it doesn't cut off first. If your not sure how > get someone to give you a hand. ENJOY !!! RED

RE: Engine runs can't throttle down
 

have you tried a new glow plug?

RE: Engine runs can't throttle down
 

Hey thanks for all the help I just got it to work, it was the low speed on the carb and the throttle stop set up, I think that carb came off my 36
but couldent remember so it needed to be retuned for the 28 took me couple of hours but we all got it and agian thanks for everyones help in this matter.


forever fly


John