521255 Suburban KIT, SLEEVE BEARINGS MOTOR GSKT/SCREWS

KIT, SLEEVE BEARINGS MOTOR GSKT/SCREWS SF-35VHQ/VHFQ, SF42Q/FQ, SFV-42Q/FQ

Replaces; 233043, 521232 

The Suburban 521255 kit is the earlier OEM sleeve‑bearing motor kit used in several high‑output SF‑series furnaces that use the Q / FQ / VHQ / VHFQ combustion housings. It includes the correct 12‑volt blower/combustion motor along with the matching gasket and mounting screws required for a complete installation.

This kit was later superseded by 521232, but many technicians still search for 521255 because it appears in older service manuals and parts lists.

What’s Included

• OEM‑spec sleeve‑bearing blower/combustion motor

• Correct motor gasket for proper combustion‑chamber sealing

• Mounting screws matched to the Q/FQ/VHQ housings

• Direct‑fit hardware for a clean, technician‑friendly install

Compatible Furnace Models

• SF‑35VHQ / SF‑35VHFQ

• SF‑42Q / SF‑42FQ

• SFV‑42Q / SFV‑42FQ

These furnaces use a high‑output combustion housing that requires this specific motor footprint and gasket thickness.

Cross‑Reference

• Replaces: 233043

• Superseded by: 521232 (current kit)

Why This Kit Matters

• Ensures proper combustion‑air and circulation airflow

• Prevents ignition lockouts caused by weak or inconsistent airflow

• Restores correct RPM and heating performance

• Replaces worn gaskets that cause vibration, noise, or air leakage

• Provides all hardware needed for a complete, reliable repair