Carburetor Compatible with Murray M115-38 Riding Mower 13AC77LF058

What It Is

This is a replacement carburetor for the Murray M115-38 riding mower (model 13AC77LF058). It manages the air-fuel mixture sent to the engine’s cylinder, critical for starting, idling, and cutting performance. Designed for 38-inch deck Murray riders with a Briggs & Stratton single-cylinder engine.

Fitment & Compatibility

Before buying, confirm three things:

• Exact model number – Must match Murray 13AC77LF058 (check plate under seat or on frame).
• Engine make – This carb fits Briggs & Stratton engines (common on this Murray model). Not for Kohler or Kawasaki.
• Deck size – Only verified for 38-inch decks; may differ on 42-inch or 46-inch Murray riders.
  Measure mounting bolt spacing (typically 2.5” center-to-center) and fuel inlet diameter (usually 1/4” barb). This is an aftermarket part, not OEM Murray, but uses the same gasket pattern.

Key Things to Know

• Quality – Aftermarket carb; may need minor gasket trimming or idle screw adjustment out of the box. Expect slight tuning.
• Installation difficulty – Easy for intermediate DIYers. Requires removing air filter housing, two bolts, and fuel line. Basic hand tools only.
• Common gotcha – The included gasket may be thin; use a thin layer of fuel-resistant sealant if it leaks. Also, check the fuel line for cracks (replace if stiff).
• No warranty – At $19.85, treat as a disposable part. If the engine runs rough after install, clean the jets with carb cleaner.

Should You Buy It

This carb is a solid budget fix if your Murray M115-38 has hard starting, stalls, or won’t idle. Ideal for owners who don’t want to rebuild the old carb and are comfortable with a simple swap. Not for pros needing OEM reliability—expect to tweak it. If your engine is a Briggs 10-12 HP, this will likely get you mowing again for under $20.