Ariens ST927LE won't start - Snowblower Forum : Snow Blower Forums
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post #1 of 17 Old 01-12-2018, 11:21 PM Thread Starter
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Ariens ST927LE won't start

I need your help because I've tried a lot of different things and still won't run.
It was running fine at the beginning of winter (started first pulled on the very first storm of the season). It started backfiring on the 5th or 6th storm.
Now it it will sputter for a few seconds, backfire and stall. Even backfires through the card

What I tried / checked:

- cleaned carb (twice)
- clean both jet (non-adjustable)
- float is good
- all ports are clean
- float needle seat looks ok
- butterfly moves freely

- spark plug
- cleaned
- gapped to .030
- sparks

- gas
- drained old gas
- cleaned tank (plastic)
- filled with new fresh no ethanol gas
- tried with gas cap loose to see if the vent was blocked

- flywheel key is fine. took the flywheel off and all seems good.
- both valves are moving up and down (only looked through the spark plug hole)
- compresssion : I manage to get 60-70 with manual crank and over 120 with electric starter.

please help with any suggestions

Last edited by hybrid999; 01-13-2018 at 09:27 AM. Reason: Added compression info
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post #2 of 17 Old 01-13-2018, 06:48 AM
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You may want to try doing a compression test. Piston ring may be stuck.
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post #3 of 17 Old 01-13-2018, 07:16 AM
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If it e.

Last edited by jtclays; 03-13-2018 at 04:56 PM.
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post #4 of 17 Old 01-13-2018, 09:23 AM
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Quote:
Originally Posted by jtclays View Post
If it were mine, I'd check the valve clearance.
Agree with that.

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post #5 of 17 Old 01-13-2018, 09:25 AM Thread Starter
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Quote:
Originally Posted by RIT333 View Post
You may want to try doing a compression test. Piston ring may be stuck.
forgot to mention it. I manage to get 60-70 with manual crank and over 120 with electric starter. sounds goog to me...
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post #6 of 17 Old 01-13-2018, 09:28 AM Thread Starter
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Quote:
Originally Posted by jtclays View Post
If it were mine, I'd check the valve clearance.
I've done this many years ago but I don't remember how to do it. I have a feeler gauge. Does it mean I have to replace the gasket ?
any pointer to a good video or document on how to do it ?

thanks
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post #7 of 17 Old 01-13-2018, 10:02 AM
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Here are two things to try:

1) A brand-new spark plug. I've cleaned a plug before and had it seem to spark fine, but the engine would not start.

2) This happened to me years ago and I still don't understand why it worked but it did. 6 HP Tecumseh engine would not start, I checked all the same things you did, no luck. Changed spark plug, no luck. I pulled the head off and saw a layer of soot/carbon covering the underside of the head and top of the piston. Cleaned the carbon off, put it back together, it started on the first or second pull.

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post #8 of 17 Old 01-13-2018, 10:08 AM
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pour a lil gas in the carb see if it fires up
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post #9 of 17 Old 01-13-2018, 10:09 AM Thread Starter
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Quote:
Originally Posted by ELaw View Post
Here are two things to try:

1) A brand-new spark plug. I've cleaned a plug before and had it seem to spark fine, but the engine would not start.

2) This happened to me years ago and I still don't understand why it worked but it did. 6 HP Tecumseh engine would not start, I checked all the same things you did, no luck. Changed spark plug, no luck. I pulled the head off and saw a layer of soot/carbon covering the underside of the head and top of the piston. Cleaned the carbon off, put it back together, it started on the first or second pull.
I'll try that. Thanks
How did you clean it up? Any special cleaner or just scraped it?

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post #10 of 17 Old 01-13-2018, 10:10 AM Thread Starter
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Originally Posted by 1132le View Post
pour a lil gas in the carb see if it fires up
It does but not for long. Sputters and dies

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