Welcome!!Check your battery-condition,It might be too low on voltage or amps to crank it properly.If you don't know anyone with a tester,take it to an Auto-Parts or Battery store,they can test it for you.Make sure the starter-belt is tight enough too,If it slips,it won't turn it past compression.If anyone is swapping-out Starter-Solenoids,make sure you buy a Continuous-Duty Solenoid(Snow-Plow,Lift-Gate,Etc...)Not a Starter-Solenoid,it will fry in less than 5-min. of continuous use.Hope this helps.
