Volvo Penta Rear Engine Mount Lock Nut 3862657
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Volvo Penta 3862657 is a genuine OEM lock nut used in Volvo Penta rear engine-mount service. Current parts references identify this number specifically as a lock nut, rear mount or lock nut, engine mounting, making it the correct retaining fastener where part number 3862657 is called for in the engine-mount assembly.
Key Features
- Genuine Volvo Penta OEM lock nut, part number 3862657.
- Current parts references identify it as lock nut, rear mount.
- Also listed in current parts references as lock nut, engine mounting.
- Used as a retaining fastener in Volvo Penta rear engine-mount hardware groups.
- Current public listings show approximate weight around 0.020 kg on one catalog source.
Engine Compatibility
The strongest supportable fitment trail for Volvo Penta 3862657 is by exact engine-mount diagram position rather than by a broad published model list. Current sources are consistent that this part is the rear mount / engine mounting lock nut, so the safest fitment standard is the exact Volvo Penta serial-number-based parts lookup for the engine and mounting assembly being serviced.
Serial Number Fitment Notice
Fitment can vary by engine family, mount style, and hardware stack-up. Confirm Volvo Penta part number 3862657 against your engine serial number and the correct Volvo Penta mounting diagram before ordering, especially where nearby nuts and mount fasteners may look similar but serve different positions.
When This Part Needs Replacement
Replace this lock nut when the original fastener is thread-damaged, rounded, corroded, distorted, or no longer holds the rear mount hardware securely. It is also a smart replacement during adjacent engine-mount service if the original lock nut has already been removed and shows visible wear.
Installation Notes
Match this lock nut to the exact Volvo Penta application before installation. The strongest current parts trail places it at the rear mount / engine mounting position, so confirming both the part number and exact diagram location is the safest cross-check before ordering or reassembly. Inspect the related stud, washer, and mount hardware at the same time to help avoid repeat mounting issues after service.
Alternate/Superseded Part Numbers
Use Volvo Penta 3862657 as the primary ordering number. In the current sources reviewed, I did not see a stronger confirmed supersession trail than the active number itself.
Parts Desk Insight
Mounting hardware is easy to underestimate because it can look generic once it is off the engine. Matching the exact Volvo Penta mount position first is usually much safer than trying to substitute by thread and size alone.
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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.
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