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Expert
86 Answers
- Posted on Apr 04, 2009
Re: change rotory blade on craftsman 917377794
This is a nice mower, it has a Honda engine. The blade bolts onto a "blade brake clutch" which is why you see 3 bolts. Removing the two outer bolts should release the blade. Normally these bolts are about 1/4" to 5/16" diameter at the threads, and have split washers to prevent them from accidentally coming loose from vibration or impact.
Here's the steps I use when replacing the blade:
- Pull the spark plug wire off the spark plug.
- Lay the mower over on it's side (gas filler cap should be up, so whichever side allows the gass filler cap to end up on the high side of the engine).
- Find a wrench that properly fits the blade bolts.
- If right-handed; wearing a garden or protective work glove on the left hand, grasp the blade.
- Unbolt both bolts by turning in a counter-clockwise direction (left circular direction).
- Remove the bolts being sure not to lose the locking washers.
- Pull the blade off the blade mount (sometimes a light tap is necessary to loosen the blade from the blade mount).
- Replace the blade with the exact Sears part number (diagram and parts list attached below).
- Thread the bolts back on using your fingers to get them started - don't force them if they start to bind or you'll cross-thread them; bad thing).
- Snug the bolts down tight, sufficient to compress the locking washers flat.
- Don't overtighten, they need to be tight, but if you use a long handle wrench or ratchet drive you can cause them to break or fail while the balde is spinning, another bad thing. Tighten them snug assuring the washers compressed flat.
- Turn the mower back upright onto its wheels.
- Replace the spark plug wire back onto the spark plug.
- Leave sit for 30 minutes before starting to assure the oil has returned level in the engine before you attempt to start the engine.
Here's your diagram and parts list:
http://www.searspartsdirect.com/partsdirect/getSubComp.pd?modelNumber=917377794&productCategoryId=1500600&brandId=0247&modelName=Gas,-Walk-Behind-Lawnmower&diagramPageId=00001&componentDescription=ENGINE/HOUSING/HANDLE/BAG/BLADE&documentId=P0401287&backToLink=Return%20to%20Sub%20Components%20list
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Gregg
Very concise and complete answer.
Thank you very much
need to repace blade holder 184598 on acraftsman mower
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