MTD
Lawn & Garden Engine

Model #4P90MUA Official MTD engine

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

There are a couple of ways to find the part or diagram you need:

  • Click a diagram to see the parts shown on that diagram.
  • In the search box below, enter all or part of the part number or the part’s name.

Not all parts are shown on the diagrams—those parts are labeled NI, for “not illustrated”.

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For DIY troubleshooting advice and repair guides, visit our repair help section.

    Showing 10 of 173 parts

    Lawn & Garden Equipment Engine Spark Plug#162

    Cylinder head Diagram

    Lawn & garden equipment engine spark plug

    Part #951-10292
    Replaced by #951-10292A
    ?
    Manufacturer substitution
    This part replaces 951-10292. Substitute parts can look different from the original.
    BEST SELLER
    This item is not returnable
    In Stock
    $5.66 | 
    19% OFF 
    MSRP: $7.00
    Lawn & Garden Equipment Engine Oil Filter#114

    Crankshaft & crankcase cover Diagram

    In Stock
    $15.49 | 
    11% OFF 
    Phone Price: $17.49
    Lawn & Garden Equipment Engine Pre-Filter#124

    Air intake Diagram

    Lawn & garden equipment engine pre-filter

    Part #951-12256
    BEST SELLER
    This item is not returnable
    In Stock
    $5.68 | 
    30% OFF 
    Was: $8.09
    Lawn & Garden Equipment Engine Carburetor Gasket#136

    Carburetor Diagram

    Lawn & garden equipment engine carburetor gasket

    Part #951-12261
    BEST SELLER
    This item is not returnable
    In Stock
    $6.19 | 
    14% OFF 
    Phone Price: $7.19
    Lawn & Garden Equipment Engine Carburetor Float Bowl Gasket#CC

    Carburetor Diagram

    Lawn & garden equipment engine carburetor float bowl gasket

    Part #951-11349
    Replaced by #951-11349A
    ?
    Manufacturer substitution
    This part replaces 951-11349. Substitute parts can look different from the original.
    BEST SELLER
    This item is not returnable
    In Stock
    $4.09 | 
    20% OFF 
    Phone Price: $5.09
    Lawn & Garden Equipment Engine Carburetor Insulator Gasket#138

    Carburetor Diagram

    Lawn & garden equipment engine carburetor insulator gasket

    Part #951-12263
    BEST SELLER
    This item is not returnable
    In Stock
    $6.19 | 
    14% OFF 
    Phone Price: $7.19
    Snowblower Fuel Drain Plug#DD

    Carburetor Diagram

    Snowblower fuel drain plug

    Part #710-04938
    This item is not returnable
    In Stock
    $6.29 | 
    14% OFF 
    Phone Price: $7.29
    Lawn Tractor Engine Oil Drain Plug#84

    Crankshaft & crankcase cover Diagram

    Plug

    Part #710-05311
    Replaced by #951-11644
    ?
    Manufacturer substitution
    This part replaces 710-05311. Substitute parts can look different from the original.
    This item is not returnable
    In Stock
    $15.29 | 
    12% OFF 
    Phone Price: $17.29
    Guide#150

    Cylinder head Diagram

    Guide

    Part #951-12268
    This item is not returnable
    In Stock
    $7.14
    Lawn & Garden Equipment Engine Exhaust Gasket#160

    Muffler Diagram

    Lawn & garden equipment engine exhaust gasket

    Part #951-12271
    This item is not returnable
    In Stock
    $6.07

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