Name:	Chris4x4gill2 -	Reply
Subject:	Outboard smoking why?
Date:	2/17/2014 2:35:01 PM

My Dad has an early to mid 90's 150 HP V6 Mercury outboard. I believe it is an oil injection unit that was disabled in favor of using premix. He uses Quicksilver 2 stroke oil mixed 50:1 with 87 octane ethanol free gasoline.

When its first cranked using the choke / high idle it will smoke so bad you can even see the boat. After warmup, at idle it will still smoke an excessive amoutn and doesnt seem to get much better regardless of how much you run it.

The boat is not used much - maybe once a month spring - fall. What can I do to get rid of / decrease this smoke? I've had several outboards i nthe past and none have ever smoked like this.

I'm thinking it might need new rings? what else can this be an indication of?

Name:	CAT BOAT -	Reply
Subject:	Outboard smoking why?
Date:	2/17/2014 3:00:27 PM

According to your complaint, it appears that the engine has some age and needs to be tuned up.  Also, the combustion chambers, crank case and exhaust tower need to be de-carboned and cared for.  That will take care of your problem.  Should you have any questions, please call Cathouse Marine 334-358-2838. 

Respectfully,

Steve Northington

www.cathousemarine.com

Name:	Shortbus -	Reply
Subject:	Outboard smoking why?
Date:	2/17/2014 10:12:43 PM

Mix your oil correctly.

Get a ratio rite cup.

Name:	Chris4x4gill2 -	Reply
Subject:	Outboard smoking why?
Date:	2/18/2014 3:53:18 PM

Oil mixture is correct.

Thanks for the diagnoses Steve. How often should that type maintenance be performed?

Name:	Summer Lover -	Reply
Subject:	Easy fix for the smoke problem
Date:	2/18/2014 7:02:16 PM

Stop putin' that danged oil in that motor, I guarantee that it will stop smoking in no time flat.  Might work like an old bike of mine that crapped the oil injection pump....

Name:	CAT BOAT -	Reply
Subject:	Outboard smoking why?
Date:	2/19/2014 7:48:55 AM

In my opinion, at the least every two years with minimum tune-up.  The de-carboning I would just do every few years, or when it starts to smoke excessively.

Name:	Chris4x4gill2 -	Reply
Subject:	Outboard smoking why?
Date:	2/19/2014 9:36:21 AM

Thanks for the help Steve.

Name:	Chris4x4gill2 -	Reply
Subject:	Outboard smoking why?
Date:	4/28/2014 5:42:04 PM

I finally got around to doing the De-carbon process a few weeks ago. I mixed 16 0z of seafoam with 3/4 gal of gas/oil mix and sprayed aerosol Seafoam into the plug holes. I ran the motor on the mix for about 20 minutes, then let it sit for about 20 minutes and then repeated for a total fo three times. Each time, my barrel had a oil slick of black foamy crud. Less each time though. 

 The motor definately ran better. Idled better and warmed up faster with less smoke. After running it 4 or 5 times though the smoke seems to be increasing slightly. I added another can of seafoam to about 10 gallons of mix in the tank but havent ran it much since.

Name:	GoneFishin -	Reply
Subject:	Outboard smoking why?
Date:	4/28/2014 6:23:24 PM

Pay me now or pay me later. Sounds like tune up time. Call Steve and getting it running so you and your dad can enjoy it.