Volvo Penta Upper Gear Shaft Nut 3852301
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
Volvo Penta 3852301 is a genuine OEM nut used in Volvo Penta sterndrive upper vertical shaft and upper gear service. The strongest current public parts-diagram trail places this part in the DP-G / Marine Propulsion upper gear assembly as schematic object key 1, where it appears with the shaft, sliding sleeve, spacer, locking clip, bearing, and gear set. Current parts references also show earlier Volvo Penta numbers 854228 and 839332 updating to 3852301, making 3852301 the current OEM replacement number for that exact nut position.
Key Features
- Genuine Volvo Penta OEM nut, part number 3852301.
- Strongest current public diagram support places it in DP-G / Marine Propulsion as object key 1.
- Shown in the same upper gear group as shaft 3852292, sliding sleeve 3855783, spacer 3852298, locking clip 3852295, bearing 3852390, and gear set 3861685.
- Current public parts references show earlier numbers 854228 and 839332 replaced by 3852301.
- Current Volvo-style parts sources list thickness variants in this nut family, with 3852301 identified as the TH=0.00 / H=0.0 mm version.
Engine Compatibility
The strongest supportable fitment trail for Volvo Penta 3852301 is by exact sterndrive assembly position rather than by a single narrow engine list. Current public references place it in DP-G / Marine Propulsion and SX-M Upper Vertical Shaft assemblies, while broader public fitment coverage also associates it with many Volvo Penta drive families and older diesel and gasoline applications. Because this nut is part of a thickness-selected upper gear stack-up, the safest fitment standard is the exact Volvo Penta serial-number-based parts diagram for the drive or engine being serviced.
Serial Number Fitment Notice
Fitment can vary by drive family, upper gear version, and required stack-up thickness. Confirm Volvo Penta part number 3852301 against the exact serial number and the correct Volvo Penta parts diagram before ordering, especially on upper vertical shaft and upper gear assemblies where nearby nut variants such as 3852302 and 3852303 can look identical but differ by thickness.
When This Part Needs Replacement
Replace this nut when the original fastener is thread-damaged, rounded, corroded, distorted, or no longer securing the upper gear or shaft assembly correctly. It is also a smart replacement during upper gear or shaft service when the original nut has already been removed and the driveline stack-up is being checked or rebuilt.
Installation Notes
Match this nut to the exact Volvo Penta application before installation. The strongest public reference places it in the upper gear / upper vertical shaft group, so confirming both the part number and exact diagram location is the safest cross-check before ordering or reassembly. Because current public references also show thickness-specific variants in this nut family, verifying the required thickness in the parts diagram matters more than matching by thread alone.
Alternate/Superseded Part Numbers
Current public Volvo Penta parts references show 854228 and 839332 as earlier numbers updated to 3852301. Use 3852301 as the current primary OEM ordering number for this listing.
Parts Desk Insight
This is the kind of hardware part that looks generic once it is off the drive, but in upper gear assemblies the wrong thickness can affect the whole stack-up. Matching the exact Volvo Penta diagram position first is usually much safer than substituting by thread and wrench size alone.
Shipping: Ships same or next day for fast Canada wide shipping. ⚓
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.