859665 Key | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta shaft key from the Engine group, weighing 0.025 kg and listed for 5 applications across the TMD, MS and MD series. A second shaft key, 859686, is listed in this run under the Lubricating and Oil System group on 9 applications — check which one your assembly calls for.

🚤 Compatibility

Typically suits:

• Volvo Penta TMD22A
• Volvo Penta MS2B-A
• Volvo Penta MD22
• Volvo Penta MD22A
• Volvo Penta MD22L

• Engine Family: TMD, MS, MD

⚙️ Key Features

• 0.025 kg
• 5 applications across the TMD, MS and MD series
• Engine group
• Shaft key 859686 is the separate Lubricating and Oil System item in this run

🔌 Function

Sits in the keyway between shaft and hub so the drive is taken on the key rather than on friction alone, and the two turn together without slipping.

⚠️ Common Signs of Failure

• Timing or drive slipping under load
• Knocking or a rhythmic tapping from the drive end
• Key found sheared, rolled over or partly extruded from the keyway
• Keyway mouth in the shaft or hub battered or widened
• Hub able to rock on the shaft with the fixing slackened

🛠️ Service Notes

• A sheared key normally means the hub fixing was not tight enough — check the hub and shaft keyways for damage before fitting a new key
• Hub 859669 and pulley 859667 are the drive-end items listed in this run

📦 Condition

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