Description
Mercury 8M0030845 O-Ring 3.975 x .210
The Mercury 8M0030845 O-Ring is a replacement sealing component used in select Mercury and Mariner FourStroke gear housing and propeller shaft assemblies. This 3.975 x .210 O-ring is used in compatible bearing carrier / propeller shaft applications where Mercury part number 8M0030845 or 25-8M0030845 is specified.
Key Features
- Genuine Mercury O-ring replacement
- Part number: 8M0030845
- Mercury part reference: 25-8M0030845
- Size: 3.975 x .210
- Used in compatible gear housing / propeller shaft assemblies
- Fits select Mercury and Mariner 4-stroke outboard applications
- Used near the bearing carrier / propeller shaft sealing area
- Direct replacement for applications requiring Mercury 8M0030845
- Ideal for lower unit, bearing carrier, and gear housing service
Fitment / Product Details
- Brand: Mercury
- Part Number: 8M0030845
- Mercury Part Reference: 25-8M0030845
- Product Type: O-ring
- Dimensions: 3.975 x .210
- Application: Select Mercury and Mariner gear housing / propeller shaft assemblies
- Engine Types: 4-stroke EFI, 4-stroke Jet, 4-stroke SeaPro, 4-stroke Pro XS, and FourStroke applications where specified
- HP Range: Select 65 Jet through 150HP applications
- Assembly Location: Gear housing / propeller shaft / bearing carrier area
- Schematic Object Key: 18 in applicable gear housing propeller shaft diagrams
- Quantity Used: 1 per applicable assembly
- Fitment Note: Match part number 8M0030845 or 25-8M0030845 to your engine model, serial number, gear housing type, rotation, and parts diagram before ordering.
Expanded Fitment
- 65 Jet 4-Stroke: Serial range 2B095049 & Up, gear housing / propeller shaft applications where specified
- 75 EFI 4-Stroke: Serial range 2B095049 & Up, gear housing / propeller shaft applications where specified
- 75 EFI SeaPro 4-Stroke: Serial range 2B095049 & Up, gear housing / propeller shaft applications where specified
- 80 EFI 4-Stroke: Serial range 2B095049 & Up, gear housing / propeller shaft applications where specified
- 80 Jet 4-Stroke: Serial range 2B095049 & Up, gear housing / propeller shaft applications where specified
- 90 EFI 4-Stroke: Serial range 2B095049 & Up, gear housing / propeller shaft applications where specified
- 90 EFI SeaPro 4-Stroke: Serial range 2B095049 & Up, gear housing / propeller shaft applications where specified
- 100 EFI 4-Stroke: Serial range 2B095049 & Up, gear housing / propeller shaft applications where specified
- 115 EFI 4-Stroke: Serial range 2B095049 & Up, gear housing / propeller shaft applications where specified
- 115 EFI SeaPro 4-Stroke: Serial range 2B095049 & Up, gear housing / propeller shaft applications where specified
- 115 Pro XS 4-Stroke: Serial range 2B225488 & Up, gear housing / propeller shaft applications where specified
- 135 EFI FourStroke: Serial range 2B131942 & Up, gear housing / propeller shaft applications where specified
- 150 EFI FourStroke: Serial range 1B905505 & Up, gear housing / propeller shaft applications where specified
- 150 SeaPro FourStroke: Serial range 2B139139 & Up, gear housing / propeller shaft applications where specified
Why You Should Buy
- Correct Mercury O-ring for applications requiring part number 8M0030845
- Designed for compatible gear housing and propeller shaft sealing service
- Useful during bearing carrier, lower unit, or propeller shaft maintenance
- Fits select Mercury and Mariner 65 Jet through 150HP 4-stroke applications
- Helps ensure accurate replacement when matched by model, serial number, and parts diagram
Common Applications
- Mercury 65 Jet 4-stroke gear housing service
- Mercury 75HP to 115HP EFI FourStroke propeller shaft service
- Mercury SeaPro 75HP, 90HP, 115HP, and 150HP applications where specified
- Mercury 115 Pro XS FourStroke lower unit service
- Mercury 135HP and 150HP FourStroke gear housing service
- Mariner 4-stroke gear housing applications requiring 8M0030845
- Bearing carrier and propeller shaft O-ring replacement
FAQ
- What is Mercury 8M0030845? Mercury 8M0030845 is an O-ring used in compatible gear housing / propeller shaft assemblies.
- What is the Mercury part reference? This O-ring is also referenced as 25-8M0030845.
- What size is this O-ring? The O-ring size is 3.975 x .210.
- What horsepower range does it fit? This O-ring fits select 65 Jet through 150HP Mercury and Mariner 4-stroke applications where 8M0030845 is specified.
- What engine types does it fit? This part fits select 4-stroke EFI, Jet, SeaPro, Pro XS, and FourStroke applications where specified.
- Where is this O-ring used? It is used in the gear housing / propeller shaft / bearing carrier area on compatible outboards.
- Does this fit 115 Pro XS FourStroke? Yes. It is used on select 115 Pro XS FourStroke applications with serial range 2B225488 & Up where specified.
- Does this fit 150 FourStroke models? Yes. It is used on select 150 EFI FourStroke applications with serial range 1B905505 & Up and 150 SeaPro FourStroke applications with serial range 2B139139 & Up where specified.
- How should I confirm fitment? Match part number 8M0030845 or 25-8M0030845 to your engine model, serial number, gear housing type, rotation, and parts diagram before ordering.