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Oily soot on lower unit

Posted: Fri Aug 10, 2018 9:18 am
by LOTOHEAD
Hey guys I have had my 282 for a little over a month and have been putting it to good use every weekend at the lake. Last week after putting it up on the lift I noticed an oily black soot at the top of the lower unit. It will wipe off a little just with a finger but I'm not sure if this is normal. This is the first Volvo I have been around so maybe the grey is just showing what's always been there but invisible on the black merc?? In just over 50 hours it has burned almost a quart of oil but I didn't think that was too alarming. Thoughts??

Re: Oily soot on lower unit

Posted: Fri Aug 10, 2018 12:13 pm
by Big Block Power
Never anything on my drive. My engine doesn't burn a drop in the 25 hours a year. Lol

Re: Oily soot on lower unit

Posted: Fri Aug 10, 2018 1:30 pm
by Bobo87
I am not sure how old your 282 is or how it has been serviced but I have had two cobalts both with VP engines and never had an issue like that. You might want to have it serviced or contact the dealer if still under warranty.

Re: Oily soot on lower unit

Posted: Fri Aug 10, 2018 2:28 pm
by cmattj
Big Block Power wrote: Fri Aug 10, 2018 12:13 pm Never anything on my drive. My engine doesn't burn a drop in the 25 hours a year. Lol
He is almost kidding.. A recent tattoo has him hopped up on Canadian meds.

I assume your talking about your transom??

If it’s the dipstick area possibly it’s expanding fluid and a leaking o ring and you should have it checked.

The transom is a different soot

Yes you can get soot from idles especially more with captians Call on. Plus when running 91 octane fuel ( slower burning. Save that for another day) it can be more increased.

I’ve had merc 496 Motorola ecu reprogrammed through whipple for that and it helped . But no set ups for Volvo to lean the idle setting that I’ve seen.

1 qt in 50 hours is great for the application as boat engines act as if there pulling a trailer so that is use not burning if you understand the difference.

Try some 87 octane and no CC for a trip and see how that improves.

Hey we’re still wanting water pics too mr 50 hrs in a month!! Nice summer

Re: Oily soot on lower unit

Posted: Fri Aug 10, 2018 4:18 pm
by LOTOHEAD
Ha ha! Just put up some pics in the August picture post! I don’t have cc but have been running premium so I’ll switch as the dock I fuel at has no ethanol regardless. I’m going to run it this weekend and try to have a mechanic look it over this next week. Pic for you cmattj!Image

Re: Oily soot on lower unit

Posted: Fri Aug 10, 2018 7:57 pm
by cmattj
LOTOHEAD wrote: Fri Aug 10, 2018 4:18 pm Ha ha! Just put up some pics in the August picture post! I don’t have cc but have been running premium so I’ll switch as the dock I fuel at has no ethanol regardless. I’m going to run it this weekend and try to have a mechanic look it over this next week. Pic for you cmattj!Image
Great Pic. Great family and smiles pal!!

Re: Oily soot on lower unit

Posted: Tue Oct 15, 2019 6:18 am
by Krob1114
Our first VP was V-6, 190 hp.
The last day we were on the lake, late in the day, a larger newer boat with 8 people was stuck on water.
We pulled them in. I was hoping it didn't hurt our small boat.
The next season, I kept noticing black stuff on the white transom.
Never figured it out. Don't know if it was related to the tow. Maybe something not serviced right.
Traded boat in.