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Jan 23rd, 2013
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250 SHO smoking bad..... help #14382171 06/01/22 01:27 PM
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mcbassin Offline OP
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So my son and I are on vacation 1000 miles from home and my engine started smoking this morning bad. I killed it and have started it since. I noticed the last few days it puffed a little smoke on star up a few times, today it didn’t stop. I can smell oil burning smoke too. We have done a lot of idling and since it was windy, we ran slow but under a heavy load.
The engine is 2012 250 SHO with around 250-260 hrs. Never had any issues.

I’ve read about the engines “making oil” will this get into the combustion chamber? I am on the water using the trolling motor only. I plan to check the oil level when I get off.
Just hoping I didn’t break a piston ring or ruing the valves?? Any help would be great
Thanks

Last edited by mcbassin; 06/01/22 01:28 PM. Reason: Spelling

Take a kid fishing!
http://mcbassin.webs.com/
Moritz Chevrolet - 9101 Camp Bowie W Blvd, Fort Worth, TX - Monte Coon (817) 696-2003
Re: 250 SHO smoking bad..... help [Re: mcbassin] #14382205 06/01/22 02:05 PM
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ssmith Online Content
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typically when this happens you will have a crack in the heads or block allowing water to get in the oil. making oil is a seperate kind of problem pull your dipstick an see if the oil is milky.

Re: 250 SHO smoking bad..... help [Re: mcbassin] #14382231 06/01/22 02:25 PM
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NoWeighers Offline
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I second the cracked head..

Happened to mine with same symptoms.. Same year model as well..


James Bendele
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Re: 250 SHO smoking bad..... help [Re: ssmith] #14382284 06/01/22 03:00 PM
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mcbassin Offline OP
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The oil is milky. I’m assuming the head or heads are toast. I never got over temperature alarm though.

Is there any fixing this or do I have to replace the power head?


Take a kid fishing!
http://mcbassin.webs.com/
Re: 250 SHO smoking bad..... help [Re: mcbassin] #14382285 06/01/22 03:02 PM
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sprigsss Offline
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I just went through this about a year ago.

Tried lots of things in an effort to save money, but ended up having to replace the powerhead.

Good Luck, hopefully it something much simpler in your case.

Last edited by sprigsss; 06/01/22 03:54 PM.
Re: 250 SHO smoking bad..... help [Re: mcbassin] #14382300 06/01/22 03:34 PM
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Ranger1 Offline
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#2 cylinder

Re: 250 SHO smoking bad..... help [Re: sprigsss] #14382425 06/01/22 06:55 PM
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Tx Tree Grower Offline
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Originally Posted by sprigsss
I just went through this about a year ago.

Tried lots of things in an effort to save money, but ended up having to replace the powerhead.

Good Luck, hopefully it something much simpler in your case.


What does a powerhead replacement on a 250 SHO cost these days?

Re: 250 SHO smoking bad..... help [Re: mcbassin] #14382452 06/01/22 07:38 PM
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LuvWater Offline
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I just paid for a new power head on a 2011 250 SHO.........$16,000

Re: 250 SHO smoking bad..... help [Re: LuvWater] #14382456 06/01/22 07:44 PM
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Originally Posted by LuvWater
I just paid for a new power head on a 2011 250 SHO.........$16,000


OMG

Re: 250 SHO smoking bad..... help [Re: mcbassin] #14382510 06/01/22 08:59 PM
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sprigsss Offline
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Worst part for me is I had just bought a new lower unit. When I got my boat back it was smoking the first time I took it out. Just progressively got worse.

At the time I replaced lower unit, I found a new 250 SHO at Boerne marine for I believe $23k. Was told my upper was fine, so replaced lower unit. Then 4 months later I was replacing power head.

I don't think it cost me quite $16,000, but it was close to it. All in all, I was wishing I bought that new SHO from Boerne, because when it came time to replace powerhead, there were no new motors available without a long wait.

Re: 250 SHO smoking bad..... help [Re: mcbassin] #14382536 06/01/22 09:20 PM
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blackhorse Offline
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It will suck the joy right out of fishing not to mention your pocket book.

Re: 250 SHO smoking bad..... help [Re: Ranger1] #14382620 06/01/22 10:42 PM
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Originally Posted by Ranger1
Originally Posted by LuvWater
I just paid for a new power head on a 2011 250 SHO.........$16,000


OMG


Isn’t a whole new motor around 20K?

Re: 250 SHO smoking bad..... help [Re: Minner Bucket] #14382624 06/01/22 10:45 PM
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Originally Posted by Minner Bucket
Originally Posted by Ranger1
Originally Posted by LuvWater
I just paid for a new power head on a 2011 250 SHO.........$16,000


OMG


Isn’t a whole new motor around 20K?


Last few I've seen available have been listed for about $26k

Re: 250 SHO smoking bad..... help [Re: mcbassin] #14382627 06/01/22 10:53 PM
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scottsoutdoorworld Online Content
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looks like 21.817 for a new motor plus you can sell yours to help on cost
https://www.lmcboats.com/engines-for-sale-in-houston-texas--yamaha-engines

Last edited by scottsoutdoorworld; 06/01/22 10:55 PM.
Re: 250 SHO smoking bad..... help [Re: mcbassin] #14382632 06/01/22 10:57 PM
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dk2429 Offline
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One of my biggest fears taking trips a long way away is having boat issues when you get there... Man that's gotta suck


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2006 Chevy 2500HD Silverado/6.6 Duramax LBZ


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