I would use what your engine specifications require for octane, put an additive in like sea foam every time you fill up, and fill up from a reputable station like mobile, BP, Sunoco, etc. presuming that you are trailering your boat.
My guess would be the rudder shafts or the rudder shaft plates are leaking??? Then the water is running up the outside of the stringers and into the aft cabin. When you vacuum the water out try to find where it is coming in...
The L-series warranty spend rates was one of the contributing factors for Sea Ray to cease the production of +40’ yachts. Once Sea Ray has fixed the under warranty issues with the L-series boats the reliability of the yacht shouldn’t be any worse th...
Check water levels in all batteries if lead acid maintenance batteries and fully charge before attempting to start any engine. A dead battery should recharge in 4 to 6 hours with a 45amp charger.