Fires Up, runs for a second or 2 and then dies....HELP!!!

[NewbyIan]

Hi ALL,

My Thunder Tiger TS-4N has been as reliable and trusty as always until the other day .......!!!! Did all the usual pre start checks etc and fired it up but as soon as I think it was time to take of the glow starter then it just died after a few attempts it would just fire up and die straight away!!!

Does anybody have any ideas or solutions for me PLEASE!!!!

 

[beason]

i would check the plug first. that is an easy one to check, and sounds like the problem.

 

[NewbyIan]

Thanks for that! One more thing....should i stick with buying the same plug or can i go "hotter" and if so what difference would it make?

 

[beason]

it depends on the engine, and fuel nitro %. Some engines like different plugs, and you also base it on nitro in the fuel. What engine, and what fuel are you using?

 

[NewbyIan]

Its a standard .21 engine and I am using 16%.....?

Thanks for the speedy reply!

 

[beason]

I have been out of nitro for a long time, but with a big block, i would suggest running at least 20% fuel. 25 or 30% if you can find it. the engine will run so much better. As far as plug, I've enver ran that low of nitro fuel, so i would have to wait on someone else to come by and answer that one.

 

[w bill]

I have been out of nitro for a long time, but with a big block, i would suggest running at least 20% fuel. 25 or 30% if you can find it. the engine will run so much better. As far as plug, I've enver ran that low of nitro fuel, so i would have to wait on someone else to come by and answer that one.

I agree with beason 20% minium and go with a med heat range.

 

[mustangwagz]

agree'd with both gentlemen above me! 20% is only thing available at ALLL the shops around here, only way to get 30 is order it. The local shop also learned me a thing or 2 bout plugs n such...if its true, i dunno..lol but heres what he told me...

The smaller the engine, typically the hotter of a plug u want, thus, creating more heat since its a smaller engine, and doesn't have quite as much metal and mass as the larger motors. The bigger the motor, the cooler of a plug you'd want. Kinda makes sense eh? He also noted that weather conditions affect motors so much that its important to watch temps when changing plugs n such. ...which in my opinion, makes sense...typical 2 stroke tuning.

what do you "guru" gentlemen think?...local guy hittin the peace pipe, or he right?

 

[olds97_lss]

Usually, the higher the nitro, the cooler the plug.

I've found that small blocks run well with 25% nitro and a hot plug. The opposite is true with my big blocks. I run a medium plug in them with 25% nitro and it keeps them from detonating which basically is the fuel/air igniting too early and tries to push the piston back down as it comes up.

With a BB run 16% nitro, I'd go with a hot plug.