B&S 17hp OHV intermittent heavy blue smoke

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  #1  
Old 09-05-06, 06:47 AM
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Unhappy B&S 17hp OHV intermittent heavy blue smoke

This is on a Husquevarna lawn tractor. This doesn't occur all the time, but it's getting worse. I can see oil in the air filter housing, so I pulled the breather and it seemed to be ok. I also made sure the drain wasn't clogged. My dipstick shows oil is in the middle of the range. Head gasket?

If so, any trick to this being OHV. Anybody know the torque?

Thanks.
 
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  #2  
Old 09-05-06, 01:39 PM
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Could be head gasket, but there's a couple things to check first.

Smell the oil. Does it smell like gas?

What weight oil are you using in this?

Is the engine racing (over revving)?
 
  #3  
Old 09-05-06, 02:48 PM
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Thanks for the reply...
No oil in the gas, straight 30w, It's not racing and it starts up fine.

Another thing though, it used to only happen when going down hill (about 15 degrees) and to the left.
 
  #4  
Old 09-05-06, 09:11 PM
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I think you might be right about the head gasket. Pull it and have a look. I can get the torque specs for you...don't have the book with me right here & now.
 
  #5  
Old 09-06-06, 07:40 AM
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Thanks Cheese, I would appreciate the torque specs.
 
  #6  
Old 09-06-06, 11:04 AM
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BTW, before I yank the head, I was going to do a compression test. Any clue what it should be - roughly?

Thanks again.
 
  #7  
Old 09-06-06, 11:59 PM
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The torque is 220 inch pounds if your engine is a 280000 series. Your compression should be fine, and a compression check won't show the head gasket problem if that's the problem. A compression check doesn't really tell you much on this engine because it has compression release. Generally on most small engines, 90 psi is good. Your's may not register that much due to the compression release. A cylinder leakdown test would tell you more on this engine.
 
  #8  
Old 09-07-06, 02:59 AM
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This should be a 31-series engine and the head torque is still 220 inch lbs. with these and the rocker arm jam screw torque is 140 then 160 inch lbs. Post back with the engine ID numbers and I can provide the part numbers for the head, intake and exhaust gaskets.
 
  #9  
Old 09-07-06, 05:03 AM
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Thanks for the help guys.

These are the #'s I find on the tag.
311777 0164-E 001107ZE

Also, is there a setting for the valve lash?

Hey puey, whereabouts in Upstate? I was born in Rochester. Lived in Ontario/Webster area.

Thanks again.
 
  #10  
Old 09-08-06, 05:06 AM
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Unhappy

Well, I did a compression check and I have a consistent 140# so I'm beginning to suspect something else. I think I'll drain the oil and fill it to capacity per spec.
 
  #11  
Old 09-08-06, 06:13 PM
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Could be something else. Maybe breather problems, diluted oil, overfilled oil, etc... but as I said, a compression check isn't going to tell you much of anything about the head gasket. Almost every small engine I've worked on with a blown head gasket had sufficient compression. The ones that didn't had severely blown head gaskets, and probably were run for a long time with a blown gasket (until it deteriorated so badly it didn't have enough compression).
 
  #12  
Old 09-08-06, 06:23 PM
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Originally Posted by steveu812
This is on a Husquevarna lawn tractor. This doesn't occur all the time, but it's getting worse. I can see oil in the air filter housing, so I pulled the breather and it seemed to be ok. I also made sure the drain wasn't clogged. My dipstick shows oil is in the middle of the range. Head gasket?

If so, any trick to this being OHV. Anybody know the torque?

Thanks.
I have a 17 Hp OHV on my Aeriens, It Blew a Gasket one Time, and smoked ,lost some power, new Gsk did the trick.
 
  #13  
Old 09-18-06, 01:03 PM
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Problem solved

Well after replacing the breather, it still smoked like WVA tire dump. So, I removed the head and sure enough, there was a slight breach between the cylinder and the pushrod cavity. not much, but I guess it was enough huh? Anyhow, it works great now. Thanks to all who helped out.
 
  #14  
Old 09-18-06, 02:28 PM
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Fantastic, glad you got it. You know where to find us should you need us again.
 
  #15  
Old 09-18-06, 07:06 PM
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Glad you got it, and thanks for the update!
 
  #16  
Old 09-24-06, 06:30 PM
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Head gasket!,
My 15.5 HP B&S did the same EXACT thing (smoking, compression checks OK, failed leakdown) and it was the head gasket. Breached right between the cylinder and the pushrod galley. I think all these 280000 series engines have this problem over time.

Paul
 
  #17  
Old 10-06-06, 11:03 PM
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engine smokes 14.5 b&s

this is the engine specs
model 287707 type 0225 01
code 9505024a
smokes
its a western auto wizard 42" I/C ohv 14.5
mod for for lawnmower itself 7143a89 ser 031198a004738

anyhelp is better than none
if you want you can email me im not always smart enough to check this thread
my name is aaron thanks for all your help
 

Last edited by aaron1979m; 10-10-06 at 11:07 AM.
  #18  
Old 10-07-06, 01:19 AM
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Could be head gasket, worn rings, gas-thinned oil, or overfilled with oil.
 
  #19  
Old 10-09-06, 03:19 PM
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engine smokes

model 287707 type 0225 01
code 9505024a

smokes blueish smoke throughout running time
but smokes the most whenever it is under load
im unsure of the problem but there isnt gas in the oil
and im using 30w not 10-30 and im still.. having probs
with oil burning.. is there anyone that knows what i can do
 
  #20  
Old 10-10-06, 12:13 AM
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You'll probably have to hone and re-ring the engine to fix it, but you could pull the head and inspect the gasket first (has to come off anyway to redo the engine).
 
  #21  
Old 10-10-06, 11:04 AM
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smoke

thank you , so is it hard to re-ring and rehone?? oh rephrase whats odd is now it only smokes sometimes thru running time

im in at wits end the last mile the end of my rope .

so pls cheese give me some ideas on what in gods name could cause this

oh before you answer thanks in advance and the oil level is at spec
and 30w not 10-30
 

Last edited by aaron1979m; 10-10-06 at 01:39 PM.
  #22  
Old 10-10-06, 11:59 PM
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It requires engine removal, disassembly, inspection, a cylinder hone, micrometer, ring compressor, torque wrench, and a knowledge of the working internals of an engine. I'd suggest getting a manual.
 
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