You may need to pull the plugs and carefully hand crank the engine to break the vacuum seals and varnish buildup on the cylinder walls & pistons. When you store a engine for over 3 months you really need to add in an additive to the gas and fully fill the tank and you need to put oil into the cylinders to coat the walls (doesn’t take much).
[https://www.edmunds.com/car-maintenance/how-to-prep-your-car-for-long-term-storage.html|Edmunds - How to Prep Your Car for Long Term Storage]