Tee Dee 010 needs glow battery

Hello, I have 50 years of experience running glow engines, but only 10 minutes of experience with the tiny Tee Dee 010. Runs OK, but only with glow plug battery connected.  Will stop pretty quickly if I disconnect.  Brand new engine, running a little rich but two-cycling, fuel is not 1/2 A fuel, but should have about 18-20% nitro.  Is the little guy just telling me he needs more nitro??

 Thanks!

PS: Tee Dee 020 runs perfectly on exactly the same fuel.  Glow battery not required even when running very rich.

Hello:
1) Check that the glow plug and the spraybar venturi are properly adjusted.
2) Connect the battery to the glow plug.
3) Try to tune the engine by closing the needle to its maximum rpm.
4) After 2 minutes of running at full rpm, remove the power from the glow plug.
5) If the engine decreases the rpm a little, it may be normal, you can use a 25% nitro mix then and try again.
5a) If the engine stops directly when removing the spark plug clip, use a 25% nitro mix directly.
6) Restart the engine with 25% nitro and 18 to 20% oil.
7) Tune the engine to its maximum rpm with the glow plug connected.
DO NOT remove the glow plug clip, let it consume the entire tank of fuel.
9) Fill the fuel tank with 25% nitro fuel, repeat step 7) and step one more time.
10) Fill the fuel tank with 25% nitro fuel, start the engine, tune to its maximum rpm, remove the clip from the glow plug.
11) The engine stops, replace the glow plug with a new one.