Please refer to the Images above; Product Specifications, Associate Part Chart and the Model Fit Guide below to Ensure a proper fit. PRODUCT NUMBER AND VARIATIONS: 136-6531, 136 6531, 1366531 PRODUCT TYPE: Flat Idler Pulley SIZE: Length N/A in. - Width N/A in. - Height N/A in. - Weight 0.753 lbs. NOTES & DETAILS: Toro OEM 136-6531 IS COMMINLY USED - 136-6531 Most Common Usage is Used as the Tensioner Auger Flat Idler for the Auger V-Belts on Power Max HD & Power TRX Snowblower Models and is Fastened to the Pulley/Auger Clutch Arm applying Pressure to the Auger Belt When the Operator Engages the Operators Auger Bail Lever. Multi-Force Snowblower Attachment Model Usage of 136-6531 Fastens Directly to an Idler Arm that Uses a Spring to Retain Constant Tension on the Auger Belt and Uses an Electric Switch and Electric Clutch System for Engaging and Dis-Engaging the Auger/Rotor Assembly. COMMON SERIES APPLICATIONS: Toro Select Power Max HD, Power TRX & Multi-Force Snow Blower Models. MODEL FIT CHART: COMMOM SNOWBLOWER USAGES POWER MAX Series – Model Numbers – (* Model Numbers 38842, 38843, 38844, 38860, 38865) POWER TRX Series – Model Numbers – (* Model Numbers 38870, 38875, 38890, 38891) Multi-Force Snowblower Series – Model Numbers – (* Model Numbers 78598) ASSOCIATED PARTS CHART: ASSOCIATED PARTS REFERENCES FOR PART NUMBER 136-6531 ONLY CLICK ON THE ASSOCIATED PART NUMBER TO BE REDIRECTED 138-0722 - HEX HEAD BOLT (Retains Idler Pulley to Pulley/Impeller Clutch Arm) x1 Per Idler Pulley 115-1166 - FLAT WASHER (Enables the Correct Tightening Diameter Against the Flat Idler Bearing Surface) x1 Per Flat Idler Pulley 121-4600 - HEX NUT (Retains Idler Pulley to Pulley/Impeller Clutch Arm) x1 Per Idler Pulley 137-6234-03 - PULLEY/IMPELLER CLUTCH ARM (Is Retained to the Snowblower Frame by Using a Couple Retaining Brackets and Retains the Idler Pulley as well as Enables it to Rotate. Rotation of the Impeller Clutch Arm is Initiated by Operation of the Operator Clutch/Control Handle or Lever, Engagement of the Clutch Control Handle Operates the Impeller Clutch Arm Via a Clutch Cable, this Rotation of the Impeller Clutch Arm Applies or Neutralizes Pressure Between the Clutch Belt and Idler Pulley) x1 Per Snowblower Unit * Excluding Muti-Force Model 78598 140-5476 - IDLER PULLEY TENSIOM ARM (Fasten to the Snowblower Frame and Retains the Idler Pulley and a Tension Spring and Enable Tension to be Constantly Applied to the Auger Belt) x1 Per Snowblower Unit * Only Muti-Force Model 78598 136-6504 - AUGER DRIVE BELT (Travels Between the Pulleys and Enables the Engine Rotation to be Transferred to the Auger/Rotor) x1 Per Snowblower Unit