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MTD 478-SUC engine Parts
Here are the diagrams and repair parts for MTD 478-SUC engine, as well as links to manuals and error code tables, if available.
Owner’s manual
Error CodesBy Schematic
By Part
SELECT DIAGRAM
Browse Parts for 478-SUC Engine
Crankcase diagram
Dipstick
Part #731-09316
The manufacturer no longer makes this part, and there's no substitute part
Crankcase diagram
Oil Fill Tube
Part #731-09317
The manufacturer no longer makes this part, and there's no substitute part
Carburetor diagram
Air Cleaner Gasket
Part #751-14980
The manufacturer no longer makes this part, and there's no substitute part
Crankcase diagram
Governor Gear/shaft Assembly
Part #751-12068
The manufacturer no longer makes this part, and there's no substitute part
Cylinder head diagram
Mtd Snowblower Engine Cylinder Baffle
Part #951-11180
The manufacturer no longer makes this part, and there's no substitute part
Muffler & controls diagram
Muffler Body
Part #908-05020
The manufacturer no longer makes this part, and there's no substitute part
Crankcase diagram
Cover Crank
Part #951-12395
The manufacturer no longer makes this part, and there's no substitute part
Crankcase diagram
Piston Pin
Part #951-12044
The manufacturer no longer makes this part, and there's no substitute part
Fuel tank/mounting diagram
Mtd Lawn & Garden Equipment Engine Fuel Tank Bracket
Part #951-11182
The manufacturer no longer makes this part, and there's no substitute part
Muffler & controls diagram
Nut, M8
Part #712-05059
The manufacturer no longer makes this part, and there's no substitute part
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Symptoms for water softeners
Choose a symptom to see related water softener repairs.
Main causes: loose water line connections, cracked water-carrying components, bad rotor valve seals…
Main causes: broken water flow meter, faulty timer, water flow to softener is bypassed…
Main causes: faulty brine valve assembly, bad rotor valve…
Main causes: salt bridge inside the salt tank, bad timer, valve motor failure, faulty rotor valve, clogged venturi…
Main causes: broken resin tank screen, bad resin tank seals, cracked upper distributor in resin tank…
Main causes: empty salt tank, salt bridge, depleted resin, clogged or damaged venturi, broken rotor position switch, fai…
Main causes: lack of electrical power, bad power transformer, faulty timer…
Main causes: clogged drain hose, faulty rotor valve, leaky rotor valve seals…
Repair guides for water softeners
These step-by-step repair guides will help you safely fix what’s broken on your water softener.
How to replace a water softener valve motor
The valve motor rotates the valve rotor to operate the water softener. If the water softener valve motor fails, follow t…
Repair time and Difficulty
30 minutes or less
How to replace a water softener timer
The timer is the control board you use to program the water softener. If the timer isn’t accepting commands when you pus…
Repair time and Difficulty
15 minutes or less
How to replace a water softener venturi
The venturi valve in your water softener draws brine water from the salt tank to the resin tank for regeneration. Follow…
Repair time and Difficulty
15 minutes or less
Effective articles & videos to help repair your lawn & garden engines
Use the advice and tips in these articles and videos to get the most out of your water softener.
Get answers to frequently asked questions about Sears and Sears PartsDirect.…
Learn about the main parts of a lawn mower and when to replace parts.…
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