viperviper

hey Bros,

Just came back from a run-in of my Mach 21 engine..Got a query to ask:

Noticed that after a tank of nitro, realised that my engine will often emit a loud pitch sound, sounds like a high idling sound, it's tends to goes back to normal idling sounds a few seconds after a complete stop of the buggy..

Is this normal? if not what could be the problem.

Pls advise and thanks in advance.

KK-racing

iTrader: (5)

The low end needle is 2 rich. However, wait till u hv completed the run-in process, tuned the high end needle then u lean down the low end. It shd idle at a stable speed ard 3 secs after cumming in.

viperviper

Actually i was told to use a P3 plug instead of the current P6 plug. Btw, it will only idle at a stable speed ard 5 sec after coming in to complete stop..

Thanks for your advise and i will try to lean down the low end after i hv run in.