what do i got going on here???

[PARKER RABE]

I was thinking some sort of exhaust leak or something I don't know **** about OMC has anybody seen this before I clean the **** out of the boat and the motor degrease everything it looks real nice I take it out for the day and this is what it looks like when I come home it idles like **** once you get it up on a plane it runs great smokes really bad at idle

[frederick55]

If it was me, I would first drop the lower unit and check the seals on the inner lower exhaust housing. The seals are kind of a pain to keep in place when you install a lower and they could have gotten pinched. If that's not it then your on to adapter plate and base gaskets. Are you getting a lot of black sludge through the prop?

[olboatman]

Parker looks like a bad powerhead base gasket. Check the pan base and remove the trim under the pan and check there. But something caused the idle circuit to go rich also. You wanted to clean those carbs anyway didn't ya! Seams like I do that to all my new rigs. If I lived closer I would give ya a hand I know those puppys pretty good now. Gary

[racer]

Looks like a lower main seal.

[FMP]

Start wrenching

[flabum1017]

If it was me, I would first drop the lower unit and check the seals on the inner lower exhaust housing. The seals are kind of a pain to keep in place when you install a lower and they could have gotten pinched. If that's not it then your on to adapter plate and base gaskets. Are you getting a lot of black sludge through the prop?

Sometimes people forget to put that housing back in too..... the exhaust is running up the housing and dumping out by the upper mounts......

[flabum1017]

#22

[PARKER RABE]

otor is a 1987 and I don't know if the power had would even come off it's a little crusty from been running salt water its whole life when I got the boat it was sitting 12 years I went through the carburetors everything new trim motor just everything I had to do a water pump lungs I mean just went through the whole thing and I fire right now but I was running great but everytime I take it out I got this god damn black sludge the ****ing **** is like tar running down the side of the midsection so obviously I got some sort of Leak Up top but I don't even know if the powerhead would come off it's so crowded on thereI'm going to pull that little skirt thing off of there I'm already tried to tighten the power head bolts they won't tighten but I'm going to pull that skirt off decrease it real good and pressure wash it with hot water and see what I got tomorrow I'm thinking about taking a drill and drilling out the 2 half inch holes to relieve some of the exhaust pressure in the Can

[PARKER RABE]

I bet drilling out those two holes in the back of the can will really help,how far do I have to drill in on those two holes do I go all the way through the tuner or just threw the can itself?the motor so it's very low on the transom so I hope it will help

[PARKER RABE]

Should i drill into the tuner also ? Looks like i can drill thru the housing pretty easy , looks like i should keep drilling into the tuner also ?
Sorry guys i just dont **** about omc

[PARKER RABE]

.....going to stick a half inch drill right of those two holes for the exhaust comes out underneath that little plastic caling skirt thing I'm just wondering how far I have to drill in

[PARKER RABE]

god damn thing just sitS so low in the water

[FMP]

Is you drunk?

[flabum1017]

That part is between the lower unit and tuner, just drop the lower unit and see if it is there and if the two rubber seals are there/intact/in place

[frederick55]

Looks like a lower main seal.

Didn't think of that, but Racer brings up a good point. Bad lower main seal would allow gas/oil to blow down into the outer housing. If you don't see sludge coming through the prop hub, it's probably not the base gasket. Drilling holes won't cure it.