855390 Tensioner | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta tensioner from the Alternator, Charging, Electric Motor and Electric Drives group, for engines from serial number 67511 onwards, weighing 0.22 kg and listed for 44 applications across AQ, BB, DP, SP and MS series.

🚤 Compatibility

• Engine Family: AQ, BB, DP, SP, MS
• Serial Range: SN 67511-

Full model list at the end of this description.

⚙️ Key Features

• For engines from serial number 67511 onwards
• 0.22 kg
• 44 applications across five series
• Belt tensioner

🔌 Function

Keeps the drive belt at its working tension so it turns the driven components without slipping or being strained.

⚠️ Common Signs of Failure

• Belt squeal on start-up or when electrical load comes on
• Belt dust or black rubber deposits around the pulleys
• Battery not charging properly because the belt is slipping
• Tensioner seized, notchy or rattling when moved by hand
• Belt edges frayed from running out of line

🛠️ Service Notes

• The serial number break matters here - engines before 67511 take a different arrangement, so check the engine number before ordering
• A second tensioner, 855669, is listed here for 16 AQ applications at 0.193 kg, so confirm which arrangement your engine uses
• Fit a new belt with a new tensioner and recheck the tension after the first few hours of running

📦 Condition

• Genuine Volvo Penta part
• Brand new
• Supplied in original or equivalent packaging

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta 740B, 500A, 501A, 501B, 570A, 572A, 430A, 430B, 431A, 431B, 432A, 434A, 570, 500B, 571A, 430
• Volvo Penta DP-C, DP-C1, DP-D, DP-D1, DP-A, DP-A2
• Volvo Penta AQ271A, AQ271C, AQ271B, AQ271D
• Volvo Penta SP-C, SP-A2, SP-C1
• Volvo Penta AQ200D, AQ200F
• Volvo Penta AQ225D, AQ225F
• Volvo Penta AQ231A, AQ231B
• Volvo Penta AQ311A, AQ311B
• Volvo Penta AQ205A
• Volvo Penta AQ211A
• Volvo Penta AQ260A
• Volvo Penta AQ290A
• Volvo Penta BB231A
• Volvo Penta BB261A
• Volvo Penta MS4B