Yes
Take it to an airsmith or paintball tech.
the safety, take out the co2. Or, just contact the manufacturer or take it to a local paintball shop to get it repaired.
Take it to a paintball field and have it looked at. Or be specific about he electrical problem.
The neutal safety switch will allow engine to start in park or neutral only. You must fix problem.
replace the seals
lube it and clean it, chances are that's what it needs, use paintball specific oil, no motor oil or wd-40
You replace them!
Read the manual, or be specific about the problem.
What to do when impeller is stuck on jet ski
It depends whats wrong with it there's a lot of things that could be wrong with it
unclog it