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OEM (Genuine) Mercury Serpentine Tensioner
PartNumber: BT4Z-6B209-B
Product Specifications- Other Names: Belt Tensioner, Serpentine Tensioner
- Item Dimensions: 15.8 x 10.8 x 0.6 inches
- Item Weight: 2.10 Pounds
- Fitment Type: Direct Replacement
- Replaces: 7T4Z-6B209-AA, 8T4Z-6B209-A
- Part Description: Mercury Serpentine Tensioner
$89.31 MSRP:$147.64You Save: $58.33 (40%)
Gates® Drivealign OE Exact Automatic Belt Tensioner for Mercury
PartNumber: 38299Product Specifications- Bearing Bore Inside Diameter 1: 17 mm
- Contact Surface: Smooth/Backside
- Material: Steel
- Number Of Pulleys: 1
- OE Comparison Rating: OE Exact
- Outside Diameter: 3"
- Pulley 1 Flanged: No
- UPC: 770075167921
- Width: 37 mm
- Part Description: Mercury Drivealign OE Exact Automatic Belt Tensioner
$155.90
Dayco® No Slack Automatic Belt Tensioner Assembly for Mercury
PartNumber: 89625Product Specifications- Belt Type: Serpentine
- Direction: Clock Wise
- Number Of Pulleys: 1
- Pulley 1 Diameter: 70
- Pulley 1 Flat: N
- Pulley 1 Number Of Grooves: 6
- Pulley 1 Width: 28.7
- UPC: 036687767936
- Part Description: Mercury No Slack Automatic Belt Tensioner Assembly
$143.03
OEM (Genuine) Mercury Tensioner
PartNumber: F6AZ-6L266-CA
Product Specifications- Other Names: Tensioner
- Item Dimensions: 4.8 x 4.7 x 2.6 inches
- Item Weight: 1.30 Pounds
- Fitment Type: Direct Replacement
- Replaces: F6AZ-6L266-AA
- Part Description: Mercury Tensioner
$48.78 MSRP:$70.72You Save: $21.94 (32%)
Dayco® No Slack Automatic Belt Tensioner Assembly for Mercury
PartNumber: 89220Product Specifications- Belt Type: Serpentine
- Direction: Clock Wise
- Number Of Pulleys: 1
- Pulley 1 Diameter: 76
- Pulley 1 Flat: Y
- Pulley 1 Width: 26
- UPC: 038244912254
- Part Description: Mercury No Slack Automatic Belt Tensioner Assembly
$67.03OEM (Genuine) Mercury Tensioner
PartNumber: F6AZ-6L266-DA
Product Specifications- Other Names: Tensioner
- Item Dimensions: 4.6 x 4.7 x 2.6 inches
- Item Weight: 1.30 Pounds
- Fitment Type: Direct Replacement
- Replaces: F6AZ-6L266-BA
- Part Description: Mercury Tensioner
$49.61 MSRP:$71.92You Save: $22.31 (32%)
Gates® Drivealign OE Exact Automatic Belt Tensioner for Mercury
PartNumber: 38298Product Specifications- Bearing Bore Inside Diameter 1: 17 mm
- Contact Surface: Smooth/Backside
- Material: Steel
- Number Of Pulleys: 1
- OE Comparison Rating: OE Exact
- Outside Diameter: 2.99"
- Pulley 1 Flanged: No
- UPC: 770075157953
- Width: 37 mm
- Part Description: Mercury Drivealign OE Exact Automatic Belt Tensioner
$136.71
Dayco® No Slack Automatic Belt Tensioner Assembly for Mercury
PartNumber: 89628Product Specifications- Belt Type: Serpentine
- Direction: Clock Wise
- Number Of Pulleys: 1
- Pulley 1 Diameter: 70
- Pulley 1 Flat: Y
- Pulley 1 Width: 26
- UPC: 036687815996
- Part Description: Mercury No Slack Automatic Belt Tensioner Assembly
$64.70OEM (Genuine) Mercury Tensioner
PartNumber: 7T4Z-6K254-AA
Product Specifications- Other Names: Tensioner
- Item Dimensions: 3.4 x 3.3 x 2.7 inches
- Item Weight: 0.80 Pounds
- Fitment Type: Direct Replacement
- Part Description: Mercury Tensioner
$39.41 MSRP:$57.63You Save: $18.22 (32%)
Dayco® No Slack Automatic Belt Tensioner Assembly for Mercury
PartNumber: 89370Product Specifications- Belt Type: Serpentine
- Direction: Clock Wise
- Number Of Pulleys: 1
- Pulley 1 Diameter: 76
- Pulley 1 Flat: Y
- Pulley 1 Width: 30.9
- UPC: 036687625991
- Part Description: Mercury No Slack Automatic Belt Tensioner Assembly
$59.44OEM (Genuine) Mercury Tensioner
PartNumber: 7T4Z-6K254-BA
Product Specifications- Item Dimensions: 3.4 x 3.3 x 2.6 inches
- Item Weight: 0.80 Pounds
- Fitment Type: Direct Replacement
- Part Description: Mercury Tensioner
$39.17 MSRP:$56.78You Save: $17.61 (32%)
OEM (Genuine) Mercury Serpentine Tensioner
PartNumber: 2W7Z-6B209-AA
Product Specifications- Other Names: Belt Tensioner, Serpentine Tensioner
- Item Dimensions: 8.7 x 7.7 x 8.0 inches
- Item Weight: 2.30 Pounds
- Fitment Type: Direct Replacement
- Replaces: XR3Z-6B209-AB
- Part Description: Mercury Serpentine Tensioner
$47.07 MSRP:$75.09You Save: $28.02 (38%)
Dayco® No Slack Automatic Belt Tensioner Assembly for Mercury
PartNumber: 89247Product Specifications- Belt Type: Serpentine
- Direction: Clock Wise
- Number Of Pulleys: 1
- Pulley 1 Diameter: 76
- Pulley 1 Flat: N
- Pulley 1 Number Of Grooves: 6
- Pulley 1 Width: 28.7
- UPC: 036687186287
- Part Description: Mercury No Slack Automatic Belt Tensioner Assembly
$52.14
OEM (Genuine) Mercury Serpentine Idler Pulley
PartNumber: 3M5Z-6A228-AE
Product Specifications- Item Dimensions: 5.5 x 4.3 x 4.3 inches
- Item Weight: 2.10 Pounds
- Fitment Type: Direct Replacement
- Replaces: 3M5Z-6A228-AD
- Part Description: Mercury Serpentine Idler Pulley
$169.49 MSRP:$272.73You Save: $103.24 (38%)
Gates® Drivealign OE Exact Automatic Belt Tensioner for Mercury
PartNumber: 38485Product Specifications- Bearing Bore Inside Diameter 1: 17 mm
- Contact Surface: Smooth/Backside
- Material: Thermoplastic
- Number Of Pulleys: 1
- OE Comparison Rating: OE Exact
- Outside Diameter: 2.76"
- Pulley 1 Flanged: No
- UPC: 770075441106
- Width: 25.5 mm
- Part Description: Mercury Drivealign OE Exact Automatic Belt Tensioner
$81.97
Dayco® No Slack Automatic Belt Tensioner Assembly for Mercury
PartNumber: 89233Product Specifications- Belt Type: Serpentine
- Direction: Counter Clock Wise
- Number Of Pulleys: 1
- Pulley 1 Diameter: 76
- Pulley 1 Flat: Y
- Pulley 1 Width: 26
- UPC: 036687119575
- Part Description: Mercury No Slack Automatic Belt Tensioner Assembly
$51.94
Gates® Drivealign Automatic Belt Tensioner for Mercury
PartNumber: 39273Product Specifications- Bearing Bore Inside Diameter 1: 17 mm
- Contact Surface: Smooth/Backside
- Material: Thermoplastic
- Number Of Pulleys: 1
- OE Comparison Rating: OE Performance
- Outside Diameter: 70 mm
- Pulley 1 Flanged: No
- UPC: 770075615880
- Width: 24.5 mm
- Part Description: Mercury Drivealign Automatic Belt Tensioner
$57.40
Dayco® No Slack Automatic Belt Tensioner Assembly for Mercury
PartNumber: 89295Product Specifications- Belt Type: Serpentine
- Direction: Counter Clock Wise
- Number Of Pulleys: 1
- Pulley 1 Diameter: 76
- Pulley 1 Flat: Y
- Pulley 1 Width: 31
- UPC: 036687280411
- Part Description: Mercury No Slack Automatic Belt Tensioner Assembly
$43.56
OEM (Genuine) Mercury Serpentine Tensioner
PartNumber: 1L2Z-6B209-C
Product Specifications- Other Names: Belt Tensioner, Serpentine Tensioner
- Item Dimensions: 10.1 x 3.0 x 4.5 inches
- Item Weight: 2.50 Pounds
- Fitment Type: Direct Replacement
- Replaced by: 1L2Z-6B209-D
- Part Description: Mercury Serpentine Tensioner
$50.31 MSRP:$79.56You Save: $29.25 (37%)
Gates® Drivealign OE Exact Automatic Belt Tensioner for Mercury
PartNumber: 38121Product Specifications- Bearing Bore Inside Diameter 1: 17 mm
- Contact Surface: Smooth/Backside
- Material: Steel
- Number Of Pulleys: 1
- OE Comparison Rating: OE Exact
- Outside Diameter: 76 mm
- Pulley 1 Flanged: No
- UPC: 072053436143
- Width: 30.5 mm
- Part Description: Mercury Drivealign OE Exact Automatic Belt Tensioner
$55.99
Dayco® No Slack Automatic Belt Tensioner Assembly for Mercury
PartNumber: 89218Product Specifications- Belt Type: Serpentine
- Direction: Counter Clock Wise
- Number Of Pulleys: 1
- Pulley 1 Diameter: 76
- Pulley 1 Flat: Y
- Pulley 1 Width: 31
- UPC: 038244912247
- Part Description: Mercury No Slack Automatic Belt Tensioner Assembly
$45.08
OEM (Genuine) Mercury Serpentine Tensioner
PartNumber: 9L8Z-6B209-A
Product Specifications- Other Names: Belt Tensioner, Serpentine Tensioner
- Item Dimensions: 10.1 x 3.0 x 4.4 inches
- Item Weight: 3.00 Pounds
- Fitment Type: Direct Replacement
- Part Description: Mercury Serpentine Tensioner
$103.28 MSRP:$170.73You Save: $67.45 (40%)
Gates® Drivealign OE Exact Automatic Belt Tensioner for Mercury
PartNumber: 38279Product Specifications- Bearing Bore Inside Diameter 1: 17 mm
- Contact Surface: Smooth/Backside
- Material: Steel
- Number Of Pulleys: 1
- OE Comparison Rating: OE Exact
- Outside Diameter: 76 mm
- Pulley 1 Flanged: No
- UPC: 072053821086
- Width: 30.5 mm
- Part Description: Mercury Drivealign OE Exact Automatic Belt Tensioner
$73.67
Dayco® No Slack Automatic Belt Tensioner Assembly for Mercury
PartNumber: 89306Product Specifications- Belt Type: Serpentine
- Direction: Counter Clock Wise
- Number Of Pulleys: 1
- Pulley 1 Diameter: 100
- Pulley 1 Flat: Y
- Pulley 1 Width: 30
- UPC: 036687312884
- Part Description: Mercury No Slack Automatic Belt Tensioner Assembly
$40.33
Gates® Drivealign OE Exact Automatic Belt Tensioner for Mercury
PartNumber: 38168Product Specifications- Bearing Bore Inside Diameter 1: 17 mm
- Contact Surface: Smooth/Backside
- Material: Thermoplastic
- Number Of Pulleys: 1
- OE Comparison Rating: OE Exact
- Outside Diameter: 76 mm
- Pulley 1 Flanged: No
- UPC: 072053675603
- Width: 22 mm
- Part Description: Mercury Drivealign OE Exact Automatic Belt Tensioner
$82.30
Dayco® No Slack Automatic Belt Tensioner Assembly for Mercury
PartNumber: 89312Product Specifications- Belt Type: Serpentine
- Direction: Counter Clock Wise
- Number Of Pulleys: 1
- Pulley 1 Diameter: 90
- Pulley 1 Flat: Y
- Pulley 1 Width: 27
- UPC: 036687311993
- Part Description: Mercury No Slack Automatic Belt Tensioner Assembly
$41.81
OEM (Genuine) Mercury Serpentine Tensioner
PartNumber: 4L8Z-6B209-AA
Product Specifications- Other Names: Belt Tensioner, Serpentine Tensioner
- Item Dimensions: 8.3 x 5.1 x 3.9 inches
- Item Weight: 2.70 Pounds
- Fitment Type: Direct Replacement
- Part Description: Mercury Serpentine Tensioner
$74.35 MSRP:$122.91You Save: $48.56 (40%)
Gates® Drivealign OE Exact Automatic Belt Tensioner for Mercury
PartNumber: 38125Product Specifications- Bearing Bore Inside Diameter 1: 17 mm
- Contact Surface: Smooth/Backside
- Material: Steel
- Number Of Pulleys: 1
- OE Comparison Rating: OE Exact
- Outside Diameter: 82 mm
- Pulley 1 Flanged: No
- UPC: 072053448344
- Width: 30.5 mm
- Part Description: Mercury Drivealign OE Exact Automatic Belt Tensioner
$75.02
Dayco® No Slack Automatic Belt Tensioner Assembly for Mercury
PartNumber: 89372Product Specifications- Belt Type: Serpentine
- Direction: Counter Clock Wise
- Number Of Pulleys: 1
- Pulley 1 Diameter: 70.7
- Pulley 1 Flat: N
- Pulley 1 Number Of Grooves: 6
- Pulley 1 Width: 28
- UPC: 036687651327
- Part Description: Mercury No Slack Automatic Belt Tensioner Assembly
$41.03OEM (Genuine) Mercury Tensioner
PartNumber: 1L2Z-6L266-AA
Product Specifications- Item Weight: 0.60 Pounds
- Fitment Type: Direct Replacement
- Replaces: XL2Z-6L266-BA
- Part Description: Mercury Tensioner
$21.17 MSRP:$30.43You Save: $9.26 (31%)
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Next >About Mercury Belt Tensioner
Mercury's products contributed to its development in 107 years. During the 1950s, the brand received great success. Mercury has made and marketed plenty of high-quality cars and parts, including the belt tensioner. The Mercury belt tensioner makes sure that the drive belt has enough tension. The faulty belt tensioner parts can cause the car to have grinding noises, cracks, and worn-out drive belt edges.
Mercury stands out for its great parts. However, consumers need the new belt tensioners if these parts are worn or damaged. The removal process for the Mercury belt tensioner is as follows: Remove accessories in the way if needed (water pump, alternator, radiator hoses), next remove the belt from the accessories, then remove the mounting bolts for the belt tensioner, and pull the tensioner parts away from the location and compare it to the new unit. The belt tensioner should be checked every 50,000-100,000 miles. We put much emphasis on the quality of different Mercury parts and accessories. We are here for you 24/7 online.