Multiquip EM285 Float Chamber Sub Assembly
Multiquip

Multiquip EM285 Float Chamber Sub Assembly

$1.25
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EM285-Multiquip
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The Multiquip EM285 Float Chamber Sub Assembly is a genuine OEM component designed for B46S90 and CX400HFE series equipment. As a direct factory replacement, the EM285 meets the original design specifications set by Multiquip, ensuring proper integration with the carburetor fuel system on compatible machines. Verified fitment covers B46S90 walk-behind power trowels and CX400HFE mixer applications, making this sub assembly the correct choice for owners keeping those units in service.

Key Features

  • Genuine OEM Fuel System Accuracy — Manufactured to exact original tolerances, ensuring the float chamber maintains the precise fuel level regulation the carburetor depends on.
  • Direct Carburetor Drop-In — Engineered to seat and seal correctly within the carburetor body on compatible machines, so installation follows the original service procedure without adaptation.
  • Confirmed Fitment — Compatible with B46S90 walk-behind power trowels and CX400HFE mixer models, verified by Multiquip OEM part data.
  • Consistent Fuel Delivery — A correctly functioning float chamber maintains stable fuel level in the carburetor bowl, supporting steady engine RPM and smooth operation under load.
  • Fuel System Integrity — Using the correct OEM sub assembly helps prevent fuel flooding or lean-running conditions that can result from an improperly seated or worn float chamber.

The float chamber sub assembly is the lower section of the carburetor that holds a metered reservoir of fuel for delivery to the engine. Inside it, a float rises and falls with the fuel level, actuating a needle valve that controls fuel flow into the bowl — keeping the level consistent regardless of engine demand. When the float chamber is cracked, warped, or fitted with a worn seal, fuel can leak or the float can lose buoyancy, causing the engine to run rich, flood, or stall unexpectedly.

Part Details

Part NumberEM285
BrandMultiquip
Part TypeGenuine OEM
DescriptionFloat Chamber Sub Assembly

Compatibility & Fitment

Name Model
Whiteman Walk-Behind Power Trowels B46S90
Collomix Mixers CX400HFE

Verify Before You Order

Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.

Why Buy From DHS Equipment

Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.

Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.