23493470 Lower Gear | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta lower gear with a 1.85:1 ratio, weighing 84.37 kg and listed for nine applications across D series engines and DPH drives. It supersedes 22079942 and is the lightest of the three lower gears.

🚤 Compatibility

Typically suits:

• Volvo Penta D6-300A-G
• Volvo Penta D6-340A-G
• Volvo Penta D6-380A-G
• Volvo Penta DPH-E
• Volvo Penta D6-400A-G
• Volvo Penta D4-150A-G
• Volvo Penta D4-230A-G
• Volvo Penta D4-270A-G
• Volvo Penta D4-300A-G

• Engine Family: D, DPH
• HP Range: 150-400 HP

⚙️ Key Features

• Lower gear with a 1.85:1 ratio
• 84.37 kg
• Supersedes 22079942
• Listed for nine applications across D series engines and DPH drives
• The lightest of the three lower gears
• Ratio 1.85:1 (Volvo assembly listing)

🔌 Function

Forms the lower section of the drive, taking the turn through the 1.85:1 gear set and out to the propeller shaft, giving the greatest reduction of the three.

⚠️ Common Signs of Failure

• Growling or whine from the bottom of the leg under way
• Vibration through the hull as speed builds
• Gear oil milky or water in the drained oil
• Metal particles on the magnetic plug
• Chipped or pitted gear teeth and worn bearings on strip-down

🛠️ Service Notes

• Order by ratio, not by weight - 23493468 at 1.59:1 and 23493469 at 1.69:1 are the alternatives and the heavier of the three is the lowest ratio
• The upper gear 23493463 is common to all three, so a ratio change means the lower gear only
• Renew the seals and gear oil and pressure test the unit before launching

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 23493470 → Supersedes 22079942 → Supersedes 3862818 → Supersedes 3801129

OEM / Related Numbers

• 22079942 earlier number superseded by this part
• 3862818 earlier number superseded by this part
• 3801129 earlier number superseded by this part

📦 Condition

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