I have a late 70's four stroke Honda, not sure if it's a 7.5 or a 9.9. The other day I started it and it sounded muffled and no cooling water was coming out. I gave it 10 seconds or so, having had a similar problem a while back with something needing to get flushed out. I tried every flushing method I could think of, including shooting water up into the spit-out thingie (pardon my techno-babble). I started it up briefly a couple more times, but the apparent prostate problem persisted. I eventually checked the oil and discovered a substance resembling coffee with too much cream (depending on taste). Even though I do like a generous dose of cream in my coffee, this substance was nothing like the $3.99 a quart oil I recently fed to it about 12 engine hours ago. Also, the oil capacity on this engine is about .8 liters and there was probably 1.5 liters of "coffee" in there. Any ideas?