Are you aware of all the flooding by saltwater ? By fresh water. Every year. those good looking boats need a owner.
ALMOST everything that is flooded. Can be washed, dried and resold somehow. It is another world.
Or the boat company is using the cheapest quality of electrical parts.
Reason all your electrical connections are corroded is because the boat was filled with salt water some time.
Recycling flooded boats is a profitable industry.
Wiring in series was wrong. They are to be connected in parallel.
In series they develop 24 volts. That would / could damage electrical parts. You might be the luckiest boater around.
20 years ago ? My boating neighbor almost lost his boat 1 day after launching it in the spring. I go down to the docks & his boat has water coming over the floor boards at the stern. I call him and we just get the boat on the trailer. It was a brand new Trophy boat with a large engine. Boats...
Jesse and others.
Sounds like the idle setup is too lean and too slow. Move / have it adjusted it up that 1 click. And enjoy the boat.
All engines should always be adjusted to start instantly. Hot or cold. They rotate at least 500 rpm at idle cranking speed.