i did marine grease all my fittings on motor/ wondering if this is excess grease ill run on a clean barrel of water and see whats upwell it is a drain hole .... so either you are seeing just gunk residue flowing down the exhaust section...... yet usually is darker but yours is grayish... again probably gunk washing out
or.... something else is draining from above
why not just disprove it is a gear oil issue.... by checking your GC oil ... any missing oil or mixed oil with water that would have replaced any oil ?? .
yes indeed. i'm a muff guy. well until 2 weeks ago/ started using oversized barrel, as I was Tog Fishing and wanted a good rinse. used same water twice.It is not the grease you put in the fittings !!-----There is a post on here almost every week asking about this sludge.----Very normal for a 2 stroke engine running in a barrel.-----Pressure test your gearcase to look for leaks if there are any.