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#4578078 - 11/18/17 02:15 PM seizing tecumseh hs50??????
lars11 Offline


Registered: 12/16/06
Posts: 968
Loc: Sweden
thought I had it all figured out about ope. until today. My snowblower tecumseh seizes after a minute or two regardless of power. It seizes and can be turned free with a wrech, then starts just fine again...

So, did the oil vaporize during summer? No, full.
Bad oil? Changed it to new synth 0w30.
Dirt in the cooling fins? Took starter cover off and checked, nothing.

What the h--l is happening? Anyone? Ideas?
Can the lubrication break in some way I don't understand?

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#4578116 - 11/18/17 03:18 PM Re: seizing tecumseh hs50?????? [Re: lars11]
old1 Offline


Registered: 01/04/11
Posts: 999
Loc: Columbus Nebraska
Possibly the oil dipper on the connecting rod broke off. I have seen it happen if it is a stamped steel one. If is an aluminum bore engine it could be that the chrome plating on the piston wore off and the piston is sticking to the cylinder, but that usually happens when you shut off the engine. No way to check either without taking the engine apart.
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1929 ford model A No filters, and 15/40 oil

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#4578118 - 11/18/17 03:21 PM Re: seizing tecumseh hs50?????? [Re: lars11]
kc8adu Offline


Registered: 08/02/05
Posts: 894
Loc: dayton oh
that thing have an auger brake?
dragging a a bit heats up and drags it down?

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#4578161 - 11/18/17 04:48 PM Re: seizing tecumseh hs50?????? [Re: lars11]
BrocLuno Offline


Registered: 09/06/15
Posts: 5506
Loc: Kalifornia Kollective
Or, it could be the wrong mixture - lean ...
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#4578193 - 11/18/17 05:39 PM Re: seizing tecumseh hs50?????? [Re: lars11]
Merkava_4 Offline


Registered: 01/30/07
Posts: 17501
Loc: Clovis, CA
Seizes or shuts off ? Usually when an engine seizes, it don't turn freely afterwards.

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#4578354 - 11/18/17 08:38 PM Re: seizing tecumseh hs50?????? [Re: old1]
Slick17601 Offline


Registered: 12/04/04
Posts: 1515
Loc: Pennsylvania
Originally Posted By: old1
Possibly the oil dipper on the connecting rod broke off. I have seen it happen if it is a stamped steel one. If is an aluminum bore engine it could be that the chrome plating on the piston wore off and the piston is sticking to the cylinder, but that usually happens when you shut off the engine. No way to check either without taking the engine apart.


This

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#4578787 - 11/19/17 09:49 AM Re: seizing tecumseh hs50?????? [Re: lars11]
lars11 Offline


Registered: 12/16/06
Posts: 968
Loc: Sweden
Thx, that was it! Broken off slinger, see pic. Now lets see if I completely ruined it.... frown


Edited by lars11 (11/19/17 09:59 AM)

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#4578805 - 11/19/17 10:09 AM Re: seizing tecumseh hs50?????? [Re: lars11]
Oilis_Oil Offline


Registered: 02/21/16
Posts: 9
Loc: Watertown NY
dump the synthetic oil, replace the dipper and see if it runs good enough to use. dont over engineer it or worry about every little imperfection you see. its a snowblower. ive seen small engines that were hurt bad and cylinders scratched, metal in oil run for years after they were deemed no good by someone else. run some 5w30 conventional- the oil it was recommended to run in it the day it was new by the engineers that built it. ii would ck the plastic governor gear as they are prone for failure in those engines.
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#4578932 - 11/19/17 12:35 PM Re: seizing tecumseh hs50?????? [Re: lars11]
lars11 Offline


Registered: 12/16/06
Posts: 968
Loc: Sweden
Ok, I found the other half of the dipper too. Two questions:
1- You think I could weld them together maybe usin a washer underneath? (Hard to find part with short notice...)
2- What bolt on the rod is it supposed to be attached to? And what orientation? Anyone got a pic?

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#4578994 - 11/19/17 01:52 PM Re: seizing tecumseh hs50?????? [Re: lars11]
Merkava_4 Offline


Registered: 01/30/07
Posts: 17501
Loc: Clovis, CA
Originally Posted By: lars11
Thx, that was it! Broken off slinger, see pic.


Apparently, "seizing" was the correct word after all. shocked2

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#4579605 - 11/19/17 10:43 PM Re: seizing tecumseh hs50?????? [Re: lars11]
old1 Offline


Registered: 01/04/11
Posts: 999
Loc: Columbus Nebraska
You could probably weld it with a washer, if you are an excellent welder, but they aren't very expensive, and shouldn't take too long to get. And it goes on the lower bolt.
_________________________
2017 Nissan Frontier 4.0 5w30
1965 Mustang 200 c/4 10w30 QS defy
1964 Ford Ranchero 302 c/4 15/40 Delo
1929 ford model A No filters, and 15/40 oil

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#4579980 - 11/20/17 11:08 AM Re: seizing tecumseh hs50?????? [Re: lars11]
jeepman3071 Offline


Registered: 04/15/10
Posts: 4204
Loc: Storrs, Connecticut
I'd get a replacement oil dipper. You don't want it to come apart again at the wrong time.
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#4580689 - 11/21/17 05:40 AM Re: seizing tecumseh hs50?????? [Re: jeepman3071]
wag123 Offline


Registered: 06/14/11
Posts: 866
Loc: Texas
Originally Posted By: jeepman3071
I'd get a replacement oil dipper. You don't want it to come apart again at the wrong time.

+1

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#4581349 - 11/21/17 07:35 PM Re: seizing tecumseh hs50?????? [Re: lars11]
xxch4osxx Offline


Registered: 03/11/09
Posts: 2601
Loc: Cedarbrae, Ontario
I'm surprised it didn't throw the rod since it wasn't getting oiled properly.


Edited by xxch4osxx (11/21/17 07:35 PM)
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#4581668 - 11/22/17 07:35 AM Re: seizing tecumseh hs50?????? [Re: lars11]
Cujet Offline


Registered: 02/15/03
Posts: 7139
Loc: Jupiter, Florida
You might want to pull the con-rod cap off and polish the crank journal to ensure it's OK.

I have no problem fabricating my own parts. Sometimes they can be engineered NOT to fail like the OEM part.

And remember that thick oil will place additional load on that part. I suggest a quality synthetic.
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