Products Description
UT10550 Chainsaw Carburetor – Direct Replacement for Homelite 46cc Models
OEM-Spec Carburetor for UT10550, UT10927, UT10942 & UT10946
This carburetor is a direct replacement for the Zama C1M-H58 carburetor used on Homelite UT10550 series chainsaws and compatible 46cc models. It is engineered to match original equipment specifications, eliminating the need for modifications during installation. The carburetor restores proper fuel-air mixing, resolving common symptoms such as hard starting, stalling, rough idling, and power loss caused by clogged internal passages from old fuel residue . For a complete repair, this model is often listed under multiple part numbers, including 308070001 and 985597001, which correspond to the same carburetor assembly .
Technical Profiles & Materials
OEM-Spec Zama C1M-H58 Design – This carburetor is engineered to match the Zama C1M-H58 blueprint, ensuring proper fitment and reliable performance on Homelite UT10550, UT10927, UT10942, and UT10946 models without requiring modifications .
Durable Metal Components – Manufactured with a robust aluminum housing and corrosion-resistant brass jets. The carburetor uses a phenolic float that doesn't absorb fuel and thicker brass for the main jet, enhancing durability and resistance to ethanol-related degradation .
Multiple Part Number Compatibility – Homelite assigned different identifiers for the same carburetor assembly. Part numbers 308070001, 985597001, and UT-10550 all refer to the same physical unit, ensuring you find the correct part regardless of the reference system used .
Technical Specifications
| # | Parameter | Specification |
|---|---|---|
| 1 | Compatible Models | Homelite UT10550, UT10927, UT10942, UT10946 |
| 2 | Also Compatible | UT10517, UT10518, UT10519, UT10520, UT10522, UT10526 |
| 3 | Carburetor Type | Zama C1M-H58 |
| 4 | Part Numbers | 308070001, 985597001 |
| 5 | Engine Displacement | 46cc |
| 6 | Carburetor Design | Single barrel, manual choke, vacuum-operated primer |
| 7 | Includes | Carburetor unit |
Products Application
Direct Replacement for UT10550 Series Chainsaws
This carburetor is specifically designed for Homelite UT10550, UT10927, UT10942, and UT10946 chainsaws. It fits perfectly without requiring modifications, and the mounting holes align with the intake manifold, throttle linkage, and fuel inlet nipple .
Performance Restoration
Replacing the carburetor resolves common issues caused by stale fuel, including hard starting, engine stalling, surging, and rough idling. Users report engines firing up in fewer pulls and running smoother than with aged original carburetors . The calibrated fuel-air ratio specified by Homelite ensures optimal combustion efficiency .
Workshop Maintenance
For repair centres and DIY users maintaining Homelite 46cc chainsaws, this carburetor simplifies inventory by covering multiple models (UT10550, UT10927, UT10942, UT10946) with a single part. The total installation process takes under 45 minutes using basic hand tools .
Quality and Craftsmanship Details
Products Package
About Us
As a premier garden machinery parts supplier, Jiaxing Norsun Trading Co., Ltd. bridges global distributors with over 100 vetted China manufacturers. We streamline your B2B supply chain through strict quality control, flexible production, and factory-direct wholesale pricing. Partner with us for reliable, high-volume sourcing of precision-engineered outdoor power equipment components.
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FAQ
Q: How do I confirm this carburetor fits my chainsaw?
A:Check your chainsaw model number on the housing. This carburetor fits Homelite UT10550, UT10927, UT10942, UT10946, and compatible models listed above. It may also be listed as part numbers 308070001 or 985597001, which refer to the same carburetor assembly .
Q: What are the symptoms that indicate carburetor replacement is needed?
A: Common symptoms include hard starting, engine stalling after starting, rough idling, loss of power, and the saw running poorly. These issues are frequently caused by clogged internal passages from old fuel residue . If your saw cranks but won't sustain idle, the carburetor is a likely culprit.
Q: What tools are needed for installation?
A: Replacement requires basic hand tools: a Phillips screwdriver, a 5/32-inch hex wrench, pliers, and a small container for screws. The process involves disconnecting the spark plug, removing the air filter housing, unscrewing the carburetor mounting bolts, and carefully detaching the fuel line and cables .
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