Originally Posted by
Fraggle...
What motor is it fella,engine size, fuel % in it and heat of plug??
Tried heating the old girl up with a hair dryer 1st, get it hot then try it, with a touch of trim..
Also if possible slightly open the throttle using the trim on the reciever, could just be the idle gap in carb is too small or too big. With servos all on it needs to be 1-1.5mm gap with the trim set at neutral("0").
Could be air leeks, need to be propper air tight, esp round crankbearings, exhaust mainfold gasket, head shim(if fitted),...Probs needs factory settings re-set for carb lsn/hsn/idle and mid if fitted.
Oh and the plug should ideally ignite alt way to tip of coil wire.
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Right well its an old Tamiya car (Nitro Thunder) that runs a .15 motor (2.5cc)
Will have to double check the fuel but I think its 20%......
The plug has No.3 on the side of it so I think that indicates what sort of plug?! I have seen videos of these that are smoking they are so hot, mine doesnt so I may just buy a new one just to be sure its not that! It definately glows but like I say, not to the end of the tip even when wired up to the AA batteries!
I think its pointing towards an air leak then, something that is mullered that I didnt think would effect it massively is the exhaust manifold gasket! That is totally knackered, its ripped and therefore when fitted it rucks up inside the end of the manifold and doesnt fit that well so that could well be an issue! I think ill buy that, a new tank and some fuel line and will have another go!