I have a Searay 195 with a 4.3 Mercruiser, today I released the water out with the single point drain system, I noticed some fluid came out, bluish like the drive lube, the drive lube resorvoir is quite low & was serviced not that long ago. I hooked up the muffs, gave it a good flush, turned it off, drained it again seemed clear, repeated that once more & seemed clear. Has anyone else experienced this?