Small Engine Troubleshooting Problems? Ask a Mechanic Now.
Briggs twin engine? If you remove the spark plugs will the starter spin the engine? May have fluid on top of piston.??? Do you have a voltmeter to see what battery voltage drops to when you turn key to start?
Remove the spark plugs and see if it will spin. Or is that what you did, you said disconnected.??
Can you turn the engine using the screen on top, to be sure engine is not locked?
But not with starter?
When did engine last run?
No problems then? Worked ok, till parked?
One more time, did you remove the spark plugs from the heads?
You spun the engine with the plugs removed? To clear anything in the cylinders? If so, I'm going to go out on a limb ad ask you to remove one of the valve covers, and look at the valves and pushrods. These engines have history of bending or braking pushrods. If you do find pushrod problem , check both cylinders!
Let me know!