1987 mercury 8hp...tan/grey foam from exhaust-pics

[harleyman124]

1987 Mercury 8hp..tan ooze coming from idle exhaust ports (both holes) and very smoky. It idles fine, but when revved up it smokes badly. The top spark plug is wet, the bottom one is dry. I swapped the coils but got the same result on the plugs. I adjusted the idle screw, have new gas and the right ratio mix. The reeds look good too. The water pump is working fine...its a little slow to pump initially, but works good once it starts flowing. Any ideas?<br /><br />Added..I have pics of the ooze

 

[phatmanmike]

Re: 1987 mercury 8hp...tan/grey foam from exhaust-pics

send me pics, i have had similar prob, but lemme see before i start preaching<br /><br />phatmanmike@yahoo.com

 

[harleyman124]

Re: 1987 mercury 8hp...tan/grey foam from exhaust-pics

Is this leaking powerhead seals?....Cracked block?...Anyone?....

 

[Virago85]

Re: 1987 mercury 8hp...tan/grey foam from exhaust-pics

send pic to eugene1e@earthlink.net

 

[andrewkafp]

Re: 1987 mercury 8hp...tan/grey foam from exhaust-pics

I have seen a similar post here before, where the gunk came from excessive trolling, and was running out of the 2 exhaust holes.<br /><br />Here is post.. Motor is almost the same as yours.. Vintage wise.<br /> http://www.iboats.com/cgi-bin/ubb/ultimatebb.cgi?ubb=get_topic;f=29;t=011030 <br /><br />

 

[harleyman124]

Re: 1987 mercury 8hp...tan/grey foam from exhaust-pics

updated with pics!!!!!

 

[jimcanniff]

Re: 1987 mercury 8hp...tan/grey foam from exhaust-pics

Harleyman,<br /><br />Did you ever figure out what was causing that grey foam to leak from the exhaust?<br /><br />My father has a 1987 9.9 Merc that just started doing pretty much the same thing. The gear oil is leaking from the exhaust like yours but gets sprayed everywhere. Plus there is water in the chamber where we fill the lower unit oil.<br /><br />Any idea would be appreciated, thanks.<br /><br />-Jim