TTR Won't Hold Rev's

[TTR_Newbie]

I started the hobby / lifestyle a year ago with a thunder tiger raptor 30 v2, and had to take a break for around 6 months during exams. I had no problems with the engine (Irvine 36) for the first year of flying / hovering, however have just tryed to get going again and encountered a problem. The copter starts without a problem with the usual engine sounds but cuts out after a few seconds, especially if trying to increase throttle. The fuel has stood for long time, is this a concern, also should i be considering the fuel / air mixture (leanness??) Also is there a way to flush / clean / lubricate the engine without a comlpete dismantle

Any help greatly appreshiated

[Stuart]

Get yourself some WD 40 and flush the carb, then take the backplate off and give a good spray with WD40 again, rotate starter shaft by hand to hear for any possible roughness, if okay you should be fine. Fuel wise, I'd get rid of it and buy new for 14.00 for some Magnum 12% you can't go wrong.

[Stuart]

Also it sounds as though it could be leaning out when your opening up the carb, check fuel line and cluck's if you have a header, also are you using the same plug or a new one.

[antsis]

I would try some new fuel and plug to start with. Are you using a filter and is it a new one? Is it the same needle setting as before?

Pull the tube off the carb and you should see a constant drip. If not, check the hoses from the tank. It's also possible that the spraybar in the carb is partially blocked with oil residue. WD40 may clear it, but if I were you I would try and get the carb off and clean it. Don't know the raptor, but if it's like the hawk, the head shroud prevents this. However, it is possible to take the spraybar out without removing the carb, but lots of patience is required.

Hope this helps
Ant

[Raptorite]

TTR_Newbie,

It could well be that there are problems with the carb, especially if it has been sat on the shelf for such a long time and may not have been full drained and prepared for its long lay up.

One extra thing I would add to those already suggested above is to drop the engine right out, take the carb off and attach the tube from your fuel pump straight to the feed nipple on the carb. Making sure the throttle arm is fully open, wind or run the pump to get some nice clean fuel coming out of the spray arm, this will flush through any debris or congieled oil residue that may be there. When you do this make sure of course that your fuel line from the pump is filtered and that the filter is clean.

Once you have done and are satisfied with it, simply reattach the carb to the motor, bolt the motor assembly back in and give it another try.

Let us know how you get on.

Cheers,

Pete.

[TTR_Newbie]

Thank you All

I wanted to say thank you all for the quick and informative response, i will have a go at the weekend and report back

Kind Regards