Briggs "900" OHV No-Start, Tried Everything, Any Tricks With These Models? - Page 5 - Snowblower Forum : Snow Blower Forums
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post #41 of 56 Old 02-04-2020, 03:53 PM
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I donít know if it was mentioned earlier, does the Woodruff key that secures the flywheel over the ignition points have any bend on it? It only takes a very,very small bend to misplace where the magnets are supposed to be for maximum spark.

This is a common reason why many lawn mowers fail to start even though the have fuel and spark.
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post #42 of 56 Old 02-04-2020, 04:11 PM Thread Starter
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The keyways in the flywheel and the crank are perfectly centered when you remove the nut.

The cam gear is definitely rotated on the shaft, by at least 90į. Here are a couple of pictures:





- Eric
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post #43 of 56 Old 02-04-2020, 06:00 PM
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Eric, It's been a while since I did one of these but I think the plastic one is discontinued and even when you order it, you get a steel one. I think I got a note in the box and may have said 693404 was now 693404a or similar.
Glad you got to the issue
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post #44 of 56 Old 02-04-2020, 08:48 PM
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Have you checked the gas cap vent ? Take cap off, let vacuum escape, try again . Consumed fuel forms a vacuum as level drops. Gas Cap is vented to prevent this.
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post #45 of 56 Old 02-05-2020, 08:47 AM
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MDchanic
thanks for the photo's and report . onebolt thanks for the part number supersede number info ,
never could understand why briggs had to play with plastic to start with, heck even the bigger singles had plastic pins holding the counter weights in place
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post #46 of 56 Old 02-05-2020, 02:47 PM
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Man, this has been a painful thread to read through. Mechanical failure of steel parts is one thing, but plastic parts in an engine is painful to see. Thanks for the detail in your postings. Good luck with it!
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post #47 of 56 Old 02-05-2020, 04:07 PM
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Quote:
Originally Posted by Jesse11B View Post
Man, this has been a painful thread to read through. Mechanical failure of steel parts is one thing, but plastic parts in an engine is painful to see. Thanks for the detail in your postings. Good luck with it!
I was shocked as well.. the engine had very little usage.
I don't think they all fail that fast.. he just had some terrible luck



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post #48 of 56 Old 02-06-2020, 09:51 AM
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Its all about the Luck.
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post #49 of 56 Old 02-06-2020, 10:33 AM
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Second time this winter, The dreaded Murphy's law.
Sid

'66 Sears/Murray 26"
'71 Jakobson 17 SnowBlitz
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post #50 of 56 Old 02-06-2020, 12:21 PM Thread Starter
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Quote:
Originally Posted by oneboltshort View Post
... I think the plastic one is discontinued and even when you order it, you get a steel one.
OneBolt, Unfortunately, No.

Here's the new part:




The cam came in 1 day. Now I'm waiting for the paper gasket and the output shaft seal (Might As Well...), and I'll slap that bad boy back together.

- Eric
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