Hi if new glow plug, there's fuel going inside the engine but still it will not start? Only factor left are the following:
1. Igniter not working
2. engine flooded(too much fuel inside)
3. carb not in correct setting ( adjust first on factrory setting)
4. your starter can turn the engine (pull start or roto start)
5. Can you fell the compression if you are stating the engine?
6. sometimes when the clutch already engaging or jam.