Sears/Craftsman Push Mower - Missing

Old 05-12-13, 05:37 PM
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Sears/Craftsman Push Mower - Missing

I have about a 8-10 year old Craftsman Eager 1 Mower that starts on the first pull but starts missing and losing power when it warms up. I replaced the spark plug but there was no improvement. I'm thinking the ignition module may be going bad but would like some verification before I spend the $40 a new one will cost.

Old 05-12-13, 06:55 PM
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Hello Scott,

Typically when a coil fails it drops spark completely thus shutting the engine down, From your description it sounds like you may have worn valves and or guides. The exhaust is the most common one I've found to cause your symptoms, Since this machine is so old and Tecumseh is no longer in business, IMO....You may be money ahead to purchase a new machine and retire this one......
Old 05-12-13, 07:36 PM
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Check the carburetor over really good before pulling the cylinder head. I have had these things act up in the past and it ended up being a good carburetor rebuild, remember the o-rings on the venturi tube, a lot of people miss those espically the top one,,it is hard to get out, but if replaced and carb cleaned really well it will run like a big dog if the carb is done right!
Old 05-12-13, 07:40 PM
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Also, on walk behinds, the zone cable that goes to the handle you hold down to keep the engine running commonly gives trouble after a while. It gets to where it doesn't disengage the kill switch very far, and then while it holds the switch open, it begins to slowly creep back towards closed and it will start making contact. Not necessarily enough to kill the engine, but enough to cause it to miss and sputter. Something to look into.

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