Posted: 19/05/2016 at 13:12
It does take a bit of muscle to get mine going too but if it runs cleanly then there probably isn't anything wrong. Check that there isn't any long grass trapped between the blade and the deck, being careful to make sure the engine can't start by first disconnecting the spark plug.
You should be able to feel the compression stroke as you slowly pull the starter cord. If you go passed this point, let the cord return to the resting position then give it a good pull you may find it easier to get it turning over and running. If it is just coming up to compression it will be much harder - I have often had the starting cord pulled out of my hand when it balks at compression.