Unit stored 4 months, full fuel - stabilizer added, battery tender attached. Now unit starts runs briefly then quits, will not restart, wait for awhile and it will start but same issue occurs, checked fuel filter, okay?????????????

Get a battery tender to put on the battery when you aren't using it to keep it fully charged. Check battery connections and grounds.

Check the starter relay plus the starter and solenoid.

Call an auto electrician. The videos may help diagnosis.

It seems that the clutch is not disengaging may need a adjustment unless it is hydro drive then I am stumped.

There's a drain screw on the bowl of the carburetor - either run the gas out - or turn the valve to off and drain the gas in the carburetor. I also take the spark plug out and spray on top of the cylinder and all around - anything metal. GETSOME is a product out of Florida that actually works. Disconnect the battery and hook the battery up to a 2amp tender/not charger - you'll need the battery tender that keeps the voltage correct but doesn't over charge - reverse when the seasons change and you should be good to go -

check to make sure diaphragm in carb is good

Sounds like it may need some carburetor work. If you've stored it without any fuel stabilizer added, mixed well, and ran through the carburetor a little, even for as little as 30 days, the fuel can break down and leave deposits on the small mixture jets inside. Spraying some carb cleaner while starting and running will sometimes loosen up those deposits, but more often than not the carb will need to be taken apart and cleaned.

These are all symptoms of a lean condition. Most likely cause is dirty carburator passages and jets. This could be from sitting up for a long period of time causing a build up of gum and varnish or it could be a gradual thing if unit sits for shorter periods between uses(4-6 weeks). The ethenol content in todays gasoline is such that each time the carb dries out in those short periods of inactivity it leaves a corrosive buildup in the carb. Over time this can cause clogging to the extent of a running problem such as you have. Im afraid a thorough fuel system(tank to carb) flushing-cleaning- adjusting is in order.

sounds like electric fuel pump when it quits,take fuel line off at carb turn key on you should hear pump and see fuel coming at line

Check the choke and fuel filter.

check the bowl of the carb unscrew bolt on bottom clean as nessary

I wouldnt think so unless it has the voltage regulator built into it and I've never seen that.