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Craftsman 3901 lawn mower Parts
Here are the diagrams and repair parts for Craftsman 3901 lawn mower, as well as links to manuals and error code tables, if available.
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Browse Parts for 3901 Lawn Mower
Rocker arm - camshaft diagram
Nut
Part #12631-1423-0
The manufacturer no longer makes this part, and there's no substitute part
Piston - crankshaft diagram
Seal
Part #09500-0002-3
The manufacturer no longer makes this part, and there's no substitute part
Rocker arm - camshaft diagram
Shim
Part #12681-1665-0
The manufacturer no longer makes this part, and there's no substitute part
Crankcase cover diagram
Bolt
Part #12681-0345-0
The manufacturer no longer makes this part, and there's no substitute part
Cutter housing diagram
Holder Link
Part #65601-2121-0
The manufacturer no longer makes this part, and there's no substitute part
Crankcase cover diagram
Spring
Part #12631-1324-0
The manufacturer no longer makes this part, and there's no substitute part
Grass catcher bag - label diagram
Lawn Mower Label
Part #65661-5624-0
The manufacturer no longer makes this part, and there's no substitute part
Turbofan - blade diagram
Belt, 21-in
Part #65621-3721-2
The manufacturer no longer makes this part, and there's no substitute part
Governor diagram
Stopper
Part #12191-5746-0
The manufacturer no longer makes this part, and there's no substitute part
Carburetor (component parts) diagram
Float
Part #12681-4471-0
The manufacturer no longer makes this part, and there's no substitute part
Most common symptoms to help you fix your walk-behind mowers
Main causes: damaged cutting blade, loose cutting blade, damaged flywheel key, engine needs tune up…
Main causes: dirty carburetor, bad spark plug, clogged air filter, engine choke problems, clogged gas cap vent…
Main causes: drive control cable failure, worn or broken drive belt, bad transmission, broken drive wheel…
Main causes: stale gas, engine needs tune up, bad spark plug, dead battery, bad recoil starter, faulty safety switch, ba…
Main causes: engine needs tune up, dirty or clogged carburetor, damaged flywheel key…
Main causes: uneven wheel height settings, damaged wheel, dull or damaged cutting blade…
Effective articles & videos to help repair your walk-behind mowers
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Learn about the different kinds of mower blades and how to maintain them.…
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