Get free shipping on your order, with any water filter subscription. Find my filter

Open Hamburger Menu
Sears Parts Direct
Tips to find your model number

MTD 4P90MUA engine Parts

Here are the diagrams and repair parts for MTD 4P90MUA engine, as well as links to manuals and error code tables, if available.

MTD 4P90MUA engine
By Schematic
By Part
SELECT DIAGRAM
?

This is the number corresponding to the part on the diagram / schematic

Browse Parts for 4P90MUA Engine

  • The Air Valve Bonnet for MTD 4P90MUA - Part 751-12777

    Cylinder head diagram

    The Air Valve Bonnet

    Part #751-12777

    The manufacturer no longer makes this part, and there's no substitute part

  • Screw M5 X 12 for MTD 4P90MUA - Part 710-05450

    Cylinder head diagram

    Screw M5 X 12

    Part #710-05450

    The manufacturer no longer makes this part, and there's no substitute part

  • Breather Cover Plate for MTD 4P90MUA - Part 751-12770

    Crankcase diagram

    Breather Cover Plate

    Part #751-12770

    The manufacturer no longer makes this part, and there's no substitute part

  • Strainer for MTD 4P90MUA - Part 751-12776

    Cylinder head diagram

    Strainer

    Part #751-12776

    The manufacturer no longer makes this part, and there's no substitute part

  • Strainer Clip for MTD 4P90MUA - Part 751-12775

    Cylinder head diagram

    Strainer Clip

    Part #751-12775

    The manufacturer no longer makes this part, and there's no substitute part

  • Starter/shroud Stud M6 X 100 for MTD 4P90MUA - Part 710-05304

    Engine shroud diagram

    Starter/shroud Stud M6 X 100

    Part #710-05304

    The manufacturer no longer makes this part, and there's no substitute part

  • Crankcase Cover for MTD 4P90MUA - Part 951-12318

    Crankshaft & crankcase cover diagram

    Crankcase Cover

    Part #951-12318

    The manufacturer no longer makes this part, and there's no substitute part

  •  for MTD 4P90MUA - Part N/P

    Part #N/P

    The manufacturer no longer makes this part, and there's no substitute part

  • Lawn Mower Cover for MTD 4P90MUA - Part 951-12254

    Crankshaft & crankcase cover diagram

    Lawn Mower Cover

    Part #951-12254

    The manufacturer no longer makes this part, and there's no substitute part

  • Air Shield for MTD 4P90MUA - Part 951-12206

    Engine shroud diagram

    Air Shield

    Part #951-12206

    The manufacturer no longer makes this part, and there's no substitute part

Symptoms for gas chainsaws

Choose a symptom to see related chainsaw repairs.

Main causes: bad gas, engine needs tune up, cracked fuel lines, dirty carburetor…

Main causes: cracked fuel lines, leaky carburetor seals, damaged fuel tank cap, cracked fuel tank…

Main causes: stale gasoline, cracked fuel lines, dirty carburetor, damaged spark plug, worn piston rings…

Repair guides for gas chainsaws

These step-by-step repair guides will help you safely fix what’s broken on your chainsaw.

How to replace a chainsaw carburetor

How to replace a chainsaw carburetor

If the engine won't start even though there's fuel in the chainsaw, the carburetor could be the problem. Sometimes, it's…

Repair time and Difficulty

 15 minutes or less
How to replace chainsaw fuel lines

How to replace chainsaw fuel lines

The fuel line on a chainsaw becomes brittle over time and can crack. Replacing it doesn't require a lot of DYI experienc…

Repair time and Difficulty

 15 minutes or less
How to rebuild a chainsaw carburetor

How to rebuild a chainsaw carburetor

If your chainsaw isn't running well, a dirty carburetor could be the problem. You can take it apart, clean it and rebuil…

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 chainsaw.

Top questions about Sears and Sears PartsDirect

Top questions about Sears and Sears PartsDirect

Get answers to frequently asked questions about Sears and Sears PartsDirect.…

What are the main components of a lawn mower?

What are the main components of a lawn mower?

Learn about the main parts of a lawn mower and when to replace parts.…

Parts & More

Automotive
Band Saw
Countertop Microwave
Dishwasher
Front-Engine Lawn Tractor
Gas Range
Parts
Range Hood
Side-By-Side Refrigerator
Top-Mount Refrigerator
Washer