Lag between throttle on receiver and engine reacting

[Mattyboy]

I was going to write that I'm a bit of a novice with nitro but actually I'm a complete novice so bear with me!! 

 

I've got the engine idling without the wheels spinning but when I push the throttle on the receiver the engine revs, but won't sometime might take a few seconds to reach full throttle. It sounds like it's thinking about bogging down but then decides to actually react to the throttle input. 

 

Once it reaches full RPM, I can then cut the throttle so it drops to idle and then if I put full throttle on again (within a few seconds of it idling) the throttle will pick up straight away. Hope that all makes sense.

 

I'm using 20% nitro fuel and the engine is a tamiya FS-12SW. It's pretty old but has had 2 or 3 tanks through it recently.

 

Thanks

[sean-vrs]

your lsn could be too rich but nitro engines by design do not like to idle

http://www.msuk-forum.co.uk/topic/169761-engine-tone-change-at-idle/

Edited March 7, 2015 by sean-vrs