Augers jammed now engine won't start - Snowblower Forum : Snow Blower Forums
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post #1 of 44 Old 01-27-2019, 01:34 PM Thread Starter
.je
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Augers jammed now engine won't start

Ive got a Poulan Pro 270 self propelled & electric start. I didn't check my impeller for ice, so when I put the blower in drive the engine quit. Ice is completely cleared but now engine won't start. Can't smell gas from the exhaust... no idea what might have happened. Hope you could help! TIA
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post #2 of 44 Old 01-27-2019, 01:51 PM
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Probably the flywheel key got sheared or at least it got moved enough to throw the timing off. I'd almost count on it. I can't think of anything else.
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post #3 of 44 Old 01-27-2019, 02:01 PM
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That was my first thought too. But shearing the flywheel key from just engaging the augers when they're stuck? The belt would have engaged over a (very) short span of time, giving it a chance to slow down the engine slightly gradually. It should be less violent than hitting something with the augers already running, at least. Seems odd to me that it would shear the key, but it's certainly possible. Especially if the flywheel nut was maybe a little under-torqued.

Will it do anything if you spray a little gas or starting fluid into the carburetor's intake? Are you getting spark?

Checking the flywheel key can be a bit tricky. At a minimum, you need to remove the shroud that covers the flywheel (it's probably also the pull-start housing). You might be able to look down the crankshaft and compare the slot in the crankshaft, with the slot in the flywheel. If they're perfectly lined up, the flywheel key should be OK. If you can't check it that way, then you'd have to remove the flywheel nut and the flywheel, which is bit of a process, and must be done carefully to avoid engine damage.

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post #4 of 44 Old 01-27-2019, 02:05 PM
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to SBF .je

If it's turning over but just not firing/starting it might have flooded. I'd pull the plug and let it turn over for a few seconds (10-15?) with the choke off and throttle full a few times letting it rest a bit between turns. Don't want to overheat the starter.

Reinstall the plug and try starting with just the throttle full an no choke, no prime. If no joy, add choke and try again. If it still doesn't start then prime like you normally would with choke and give it a try.
If it's still not starting then were getting into the likelihood you may have sheared a key.
I'd lean more that it's flooded at this point.

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post #5 of 44 Old 01-27-2019, 03:11 PM
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You might be right, Mark. I have had the flooding problem when an engine is suddenly stopped. I'd definitely try that before pulling the shroud etc.

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post #6 of 44 Old 01-27-2019, 04:18 PM Thread Starter
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That was my first thought too. Tried after an hour but didnt start. The starter moves the augers and drive tw.
Thanks for these suggestions I'll try and let you know what happens.
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post #7 of 44 Old 01-27-2019, 05:07 PM
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For a heads up,the OP's machine a Poulan Pro 270 which uses a 254 cc gen 2 LCT engine, it FAILS to have a shear type flywheel key.it has a solid metal woodruff key, part number 585 29 72-01 WOODRUFF FLYWHEEL KEY sold in packs of 5 to the dealers Owner's Manuals | Poulan Pro listed under spare parts one can download the OM and parts lists if wanted the key is shown as number 81

OP make sure your throttle is fully open, the stop key is fully in, check for spark and gas,

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post #8 of 44 Old 01-27-2019, 05:30 PM
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Originally Posted by .je View Post
That was my first thought too. Tried after an hour but didnt start. The starter moves the augers and drive tw.
Thanks for these suggestions I'll try and let you know what happens.
The auger and drive should not try to move when starting the engine. Make sure they are not engaged. I don't believe that engine will start with a load on it.

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post #9 of 44 Old 01-27-2019, 05:30 PM
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did you pull the plug or did you just let it sit for an hour? i would still pull the plug. maybe even check for spark when you got it out.

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post #10 of 44 Old 01-27-2019, 05:41 PM
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I would definitely check for spark. It's a quick thing to check, and could reveal some other problem.

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