My first trainer came with a 40LA. I remember when it was new, it would take quite a long time to start. So I did the best thing I could think of, I went and bought an electric starter. Now that the engine is well broken in, I rarely use the starter. To the point that I don't think I have charged the starter's battery for a few months.

Just make sure you prime it good before you attach the glow igniter. Put your finger over the carb, and hand flip the prop until you can see the fuel coming up the line to the carb. Then, remove your finger and flip it over a couple times. Then attach the glow igniter. After the engine is broken in, it should start in 1 or 2 flips.