Multiquip 1851 Air Guide

The Multiquip 1851 Air Guide is a genuine OEM component designed for the DSGPULW Duo Screed and a wide range of Whiteman and International walk-behind power trowel models, including the CA4HM, CA4HC, CA5BC, J3036H55, BS90C, BH11C, BH90C, JS60C, JH90C, JH55C, B46, and additional J36-M30 series machines. As a direct Multiquip OEM part, the 1851 is manufactured to the same standards as the original component it replaces, ensuring correct fitment without guesswork. This part also confirms compatibility with select International walk-behind trowel models including the CS24H55E, CA-4-4H, BS46H11, BS46H90, JS36H90, and JS36H55. DHS Equipment stocks this part for contractors who need a verified replacement and cannot afford delays on the pour.

Key Features

• Genuine OEM Construction — Manufactured to Multiquip's original design specifications for the 1851 Air Guide, ensuring dimensional accuracy in airflow routing and housing fit.
• Direct Drop-In Replacement — Engineered to seat and secure exactly as the original, with no trimming or reworking of surrounding components.
• Broad Trowel and Screed Compatibility — Fits the DSGPULW Duo Screed and numerous Whiteman and International walk-behind power trowel models across the J, B, C, CA, BS, BH, and JS series.
• Protects Engine Cooling Efficiency — A correctly fitted air guide channels airflow precisely over the engine cooling fins; a damaged or missing guide causes uneven heat distribution and accelerated wear.
• Verified Part Number — Order with confidence using Multiquip part number 1851, confirmed against a broad range of machine configurations to eliminate misidentification.

The air guide is a formed shroud or deflector that channels cooling air from the engine recoil or fan assembly directly across the cylinder cooling fins. On air-cooled engines fitted to concrete trowels and screeds, this directed airflow is the only means of heat dissipation — without it, hot spots develop on the cylinder head, leading to premature wear, loss of power, or engine seizure under sustained load. A cracked, broken, or missing air guide disrupts this path, allowing hot air to recirculate rather than dissipate, and should be replaced as soon as damage is identified.

Part Details

Compatibility & Fitment

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.