I have a 95 Force 120, I had not started it for 6 months and yesterday I ran it with the ear muffs, after a few min. running I noticed a light charcoal gray thick mixture coming out of the prop. dont know exactly what it is...the motor ran fine, but shut it off immediately thinking this might harm the motor. Can someone please let me know what this is...?<br /><br /><br />Thanks for you help on this.