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2017/04/28 19:15:23
joea

Craftsman 917.37220 with Tecumseh ECV100 ?

It was working a few years ago when put in shed.  Started up fine with fresh fuel.  Ran well. After a minute it began pushing oil out the fill tube.  What a mess.
 
Checked the oil level and topped it up.  Started it up and it did it again.  Less mess as I was expecting it.
 
What could be the problem?  Blocked breather?  Where is it?
18 comments Leave a comment
Mikel1
Yeah, I would check the breather first.
2017/04/29 00:35:47
joea
OK, Thanks.
 
Where is the breather?  I can't see anything obvious.  Do I have to remove the top cover to see it?
2017/04/29 07:48:49
Roy
Yes.
2017/04/29 11:13:41
joea
So, pulled the cover, flywheel and breather plug.  Cleaned out the mud wasp dam.  Or whatever it was.  Put it back together, ran good for a few minutes, now pushes oil again.  Not as bad, but still a makes a mess.
2017/05/09 18:41:02
Mikel1
Out of the fill tube or breather hose?
2017/05/10 19:42:46
joea
Mikel1
Out of the fill tube or breather hose?



Fill tube.  Don't see a breather tube.
2017/05/10 22:37:36
Mikel1
Since breather assembly was okay then mostly likely compression is blowing by the piston rings. This will cause higher pressure in the crankcase, the extra pressure has to vent off. You can confirm this with a leak down tester.
2017/05/10 23:04:30
Rustys
Smell the oil to verify it doesn't smell like gas. A bad float valve will allow gas to seep into the crankcase causing the oil to become extremely thin.
2017/05/10 23:22:26
joea
I don't know what the "breather assembly" is.  There was a metal disk under the engine cover and flywheel, held on with one bolt.  Had dried mud in it.  If I blew air down one small orifice, oil would push out the filler.  
 
2017/05/11 06:22:48
Mikel1
Yes it is.
2017/05/11 08:32:51
joea
Mikel1
Yes it is.



Thanks for the images.  It was running fine when stashed in the shed a couple years ago, so I doubt it is compression related, but it could be I guess.
 
I don't remember a disc valve in there, nor could I figure out how that could work as a breather.  I guess there is an passage way that might still be blocked.
2017/05/11 09:05:16
joea
joea
Mikel1
Yes it is.



Thanks for the images.  It was running fine when stashed in the shed a couple years ago, so I doubt it is compression related, but it could be I guess.
 
I don't remember a disc valve in there, nor could I figure out how that could work as a breather.  I guess there is an passage way that might still be blocked.




Compression test shows  100-110  best I can read the gage.  Cold of course and variable oomph on the cord.
 
 
2017/05/12 06:58:09
Mikel1
Compression looks good.
I would double check the breather assembly.
2017/05/12 22:57:15
joea
Mikel1
Compression looks good.
I would double check the breather assembly.



That seems to have done it.   No oil pushing out.  There was a lot of mud still in the bottom of the outside air tube.  Is there supposed to be a filter or name plate over that?  It is right in front of the block.
 
Also, is there somewhere to get a brake pad for the flywheel brake?  That deteriorated to being useless, so it is metal on metal now.
 
Thanks for the assistance.
 
2017/05/14 12:36:10
Mikel1
Looking at ipl, don't see a filter in front of it.
Since brake pad is attached to the brake lever, you have to buy lever. Item #35831 for a little over $8, check your spec number on your tecumseh to be certain. You can use the tecumseh model and spec number to look up parts.
2017/05/14 14:09:58
joea
Mikel1
Looking at ipl, don't see a filter in front of it.
Since brake pad is attached to the brake lever, you have to buy lever. Item #35831 for a little over $8, check your spec number on your tecumseh to be certain. You can use the tecumseh model and spec number to look up parts.



Only numbers I see on the engine look like
148-374133 SER 7113E
Or close to that.
 
Oh and I had the craftsman model number wrong, all this time.  It is 917.372220.  Still no engine model number despite search.   Seems that lever is on so many models, it must be correct.   From memory it looks right.   Taking off the flywheel is always and adventure I don't look forward to.
2017/05/14 15:04:46
eddyjoe56

Tecumseh ECV100 Breather location

Should be small rectangular plate below the intake and exhaust ports. Remove 2 screws, cover then clean area with carb cleaner or other solvent. Inspect cover for dents or damage making sure that it is open to air or vented.   Item 55 on attached jpeg file
 
 
2017/05/18 05:49:12
Mikel1
This one is not vented there like others are.
2017/05/19 22:27:00

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