3804239 Upper Gear Core | Genuine Volvo Penta Part

🔧 Product Description

Core deposit for an exchange upper gear unit, listed under the Marine Propulsion group. It is the refundable charge held against the worn upper gear you return, raised on the order as a line rather than supplied as a unit. Under Volvo Penta's core numbering it pairs with part 3801239. This is the upper half of the drive only; core 3804240 is the matching lower gear line, and a full drive exchange normally needs both.

⚙️ Key Features

• Refundable core deposit, not a fitted part
• Pairs with part 3801239
• Upper gear only, with core 3804240 covering the lower gear

🔌 Function

Carries the refundable core charge on an exchange upper gear unit; the upper gear it covers takes the drive from the engine through the transom and turns it down towards the lower unit, carrying the shift mechanism.

⚠️ Common Signs of Failure

• This is a deposit line and has nothing to fail in itself; the signs below are what normally condemns the upper gear unit being exchanged
• Whine or growl from the upper unit that changes with speed and load
• Metal on the magnetic drain plug, or oil coming out milky from water ingress
• Difficulty engaging or holding a gear, with clunking on shift
• Play felt at the drive shaft, with pitted or chipped gear teeth on strip

🛠️ Service Notes

• The deposit is refunded when the old upper gear is returned; ordering this line on its own supplies no part
• Check whether the job needs the lower gear as well, since core 3804240 carries the separate deposit for that half
• Renew the bellows, gaiters and shaft seals while the drive is off, and set the shift linkage before running up

📦 Condition

• Refundable core deposit - not a physical part