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Black rubber O-ring belt, five sixteenths inch thick, fifteen and nine sixteenths inches long

Billy Goat

Billy Goat 350372-S O-Ring Belt for PR550H leaf blower

SKU CH-DHW0-QF9ZD

Replacement O-ring belt fits PR550H leaf blowers, 15-9/16 in. rubber loop

  • Genuine Billy Goat replacement for PR550H models
  • Rubber construction resists wear in outdoor conditions
  • Exact 15-9/16 inch length ensures proper tension
  • 5/16 inch diameter matches original specification
  • Direct-fit O-ring belt restores blower performance

Compatible Replacement Belt

The Billy Goat 350372-S O-Ring Belt is designed for the PR550H leaf blower. It fits the unit identified by Grainger item number 5NLJ1. This rubber component transmits power from the engine to the blower assembly. It is a direct replacement part for worn or damaged original belts.

Durable Rubber Construction

The belt uses a rubber compound built to handle outdoor vibration and temperature changes. Its 5/16 inch diameter and 15-9/16 inch length match the drive system geometry. Correct tension reduces slippage and keeps the blower running at the intended speed. Rubber construction resists cracking during seasonal storage.

Restores Drive Performance

Install this belt when the original stretches, frays or snaps during use. A fresh belt returns full airflow to the PR550H without needing a new blower. The jump is worth it when reduced air velocity makes clearing leaves inefficient. It is not for users needing a different length or diameter for another model.

How it compares

Measured against everything we stock in Cordless & Electric Leaf Blowers, at today’s prices. Recalculated every night.

Price $26.99
Cheaper than about 98% of the 116 comparable items (median $71.99).

Specifications

Product
Brand nameBILLY GOAT

Questions about this item

How do I install the 350372-S O-ring belt on my PR550H and what step is most often missed?

Loop the 5/16 in. diameter rubber belt over the drive and driven pulleys, then tension it until the 15-9/16 in. length sits snug without twisting; the step most often missed is verifying the belt tracks squarely in both pulley grooves before tightening the tensioner.

What maintenance or replacement will this rubber O-ring belt need over time?

Inspect the rubber for cracks, glazing or stretch every season; replace the belt once the 5/16 in. cross-section shows permanent deformation or the 15-9/16 in. length has elongated enough to slip under load.

What limit appears first when the PR550H runs continuously with this belt?

Heat buildup in the rubber compound causes the belt to soften and stretch, so the first sustained-use limit is thermal elongation that reduces grip on the pulleys and requires re-tensioning or replacement.

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