How do you remove and replace the main rotor on the Havoc Stinger? I wasn't able to find a replacement blade for this specific model. Will the replacement blade for the Havoc heli work. Mine is clear not yellow, red, blue, or black.

Found it on ebay...
http://cgi.ebay.com/Stabilizer-Blade-Balance-Bar-air-hog-Reflex-Helix-Heli-/250711651055?pt=Radio_Control_Parts_Accessories&hash=item3a5f9432ef#ht_920wt_1141

Here are instructions

www.rctoys.com/.../install-new-palmsize-mini-heli-main-rotor-blade-tail-propeller

I found some on Amazon.com that were reasonably priced. Here's the link for you :
http://www.amazon.com/Yellow-Replacement-Mini-Infrared-Helicopters/dp/B0015GA1YS?SubscriptionId=AKIAJWHIFVQ2LOGQYHJQ&tag=mutual01-20&linkCode=xm2&camp=2025&creative=165953

I hope this helps you out.

Check for crud wrapped around the tail rotor shaft

yeah check out rctoys.com

i dont know

Try putting the same brand of batteries in the remote. For example, Energizer.

This might help:
http://www.spinmaster.com/files/instructions/AH%20Havoc%20Heli%20IS%20R1.pdf

Make sure the blades and rotors are free of debris. I had the same problem then noticed hair had gotten wrapped around the blades. Once you remove the hair or thread or string or whatever it should fly fine

After having the same problem I got through on the phone to spinmaster this morning (it only took about five minutes). They said the problem is likely that either the gears have slipped or the shaft has disconnected from the gears and motor. They said the problem cannot be fixed by the user and the solution is to get a warranty replacement.

After opening a warrant case and giving me a case number (important!), the customer service rep asked me to email a copy of my receipt along with a picture of the helicopter with the main rotor cut off (to show that we weren't using it any longer) to their warranty department along with the case number and a description of the problem. She said they would ship out a replacement within two to six weeks. Hopefully this works. Good luck.