21191838 Adjusting Screw | Genuine Volvo Penta Part

🔧 Product Description

Genuine adjusting screw used in the mechanical governor and fuel-control system of the Volvo Penta D1-30F marine diesel engine.

🚤 Compatibility

Typically suits:

• Volvo Penta D2-40F
• Volvo Penta D1-30F

• Engine Family: D
• HP Range: 30-40 HP

⚙️ Key Features

• Confirmed D1-30F application
• Mechanical governor adjustment component
• Factory thread and contact profile
• Controls the assigned speed or linkage setting
• Adjustment requires the engine service procedure

🔌 Function

The screw establishes the assigned governor setting and provides a controlled linkage stop or spring adjustment.

⚠️ Common Signs of Failure

• Incorrect idle or rated speed
• Speed hunting
• Adjustment moving because the lock is loose
• Worn contact surface

🛠️ Service Notes

• Note and record the existing setting before disturbing anything, so you have a reference to return to if needed
• Release the lock nut fully before turning the screw, then reset the lock nut and re-check the setting — tightening the lock nut usually moves the adjustment
• Set to the clearance or position given in the workshop manual for your engine using the correct feeler or gauge; do not judge the setting by feel
• Inspect the tip and the threads and renew any screw with a worn, mushroomed or picked-up tip, because a worn tip makes the setting drift in service
• Never use an adjusting screw to force a component into position, and carry out a hot re-check after running if the manual for your engine calls for one

🔄 Supersession & Cross Reference

OEM / Related Numbers

• 21191839 - Related spring; ordered separately
• 21189174 - Related setting bolt; ordered separately
• 21192093 - Second governor adjusting screw; ordered separately

📦 Condition

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