If you have a new starter and a good battery, either we have a weak connection at some point that fails when a load is placed on it or another bad starter.
When you turn the key to start, the click you hear is the starter, correct? Are you certain that battery cables are clean, tight, and not corroded or damaged? Have you checked the ground between the battery and the engine block?
One other thought. Is it possible that the engine is locked up? If you place a socket and breaker bar on the crankshaft pulley bolt, can you turn the engine by hand?
Do me a favor. Remove the spark plugs and see if the starter turns the engine. If it does, pay attention to see if anything comes out of the spark plug holes such as coolant.
It's just a thought at this point, so hang in there.
Let me know what you find.
Joe
Saturday, June 12th, 2021 AT 7:23 PM