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OEM Mercury Power Trim Seal Kit
Mercury EFI Power Trim Hydraulic O-Ring & Seal Kit
This genuine OEM Mercury power trim seal kit is used on select Mercury 105HP EFI Jet, 135HP EFI, and 150HP EFI FourStroke outboards.
The kit contains hydraulic O-rings and sealing components used during trim cylinder reseal service, hydraulic trim repair, and power trim maintenance.
Compatible Applications
| Horsepower | Engine Model | Serial Range | Application Notes |
|---|---|---|---|
| 105HP | Mercury EFI Jet | 3B672358 & Up | Power trim assembly components |
| 135HP | Mercury EFI FourStroke | 2B131942 & Up | Hydraulic trim and tilt systems |
| 150HP | Mercury EFI FourStroke | 1B905505 & Up | Power trim assembly components |
| 150HP | Mercury EFI Sea Pro | 2B139139 & Up | Commercial Sea Pro applications |
| 150HP | Mercury EFI Pro XS | 2B550139 & Up | Performance Pro XS models |
Always verify your engine horsepower, model type, and serial number before ordering hydraulic trim components and seal kits.
OEM Part Numbers & Cross References
| Type | Part Number |
|---|---|
| Mercury OEM Number | 8M0057770 |
What This Power Trim Seal Kit is Used For
This Mercury hydraulic trim seal kit is used during repair and reseal service of compatible Mercury power trim and tilt systems.
The included hydraulic O-rings and sealing components help seal trim cylinders, hydraulic passages, pistons, caps, and trim assembly components depending on trim system configuration.
Hydraulic seals commonly wear over time due to heat, hydraulic pressure, contamination, and marine operating conditions.
Replacing worn trim seals during hydraulic service can help reduce hydraulic fluid leaks and restore proper trim and tilt operation.
Key Features and Benefits
- Genuine OEM Mercury hydraulic trim seal kit
- Fits select Mercury EFI FourStroke trim systems
- Fits 105HP EFI Jet, 135HP EFI, and 150HP EFI models
- Includes hydraulic O-rings and sealing components
- Designed for trim cylinder reseal and repair service
- Helps reduce hydraulic fluid leaks
- Supports proper trim and tilt operation
- OEM Mercury hydraulic fit and compatibility
Power Trim Seal Kit Details
- Brand: Mercury Marine
- Part Type: Hydraulic O-Ring & Seal Kit
- OEM Part Number: 8M0057770
- Application: Mercury EFI FourStroke Power Trim Systems
- Horsepower Range: 105HP-150HP
- System: Power Trim & Tilt Hydraulic System
- Use: Hydraulic trim reseal and repair service
FAQ
What engines does this trim seal kit fit?
This kit fits select Mercury 105HP EFI Jet, 135HP EFI, and 150HP EFI FourStroke outboards depending on serial number range.
What is this seal kit used for?
This kit is used to reseal and service compatible Mercury hydraulic trim and tilt systems.
Is this a genuine Mercury part?
Yes. This is a genuine OEM Mercury hydraulic trim seal kit.
Should I verify my serial number before ordering?
Yes. Mercury used multiple trim system designs and hydraulic assemblies, so serial number verification is strongly recommended.
What are common signs of leaking trim seals?
Common symptoms may include hydraulic fluid leakage, trim drifting, weak trim operation, or inability to hold trim position.
Dealer Discounts & Store Policies
Dealer / Marine Industry Discounts
Are you a marine dealer, technician, boat builder, or industry professional? We offer dealer pricing for qualified marine businesses.
Shipping Policy
- Free shipping on orders over $100 (continental U.S.).
- Orders ship via UPS, USPS, and FedEx.
- Orders received before 5:30 PM EST ship the same business day.
- Typical delivery time is 1–5 business days.
30-Day Return Policy
- Returns accepted within 30 days of delivery.
- Hydraulic and trim components should be installed only after proper diagnosis and inspection.
- Items must be new, unused, and in original packaging.
- Return authorization is required before sending items back.
Need help with a return or order question?
Contact Us
Phone: 941-721-3000
Searchable Terms
8M0057770, Mercury trim seal kit, Mercury power trim O-ring kit, Mercury hydraulic trim kit, Mercury 105 EFI Jet trim seals, Mercury 135 EFI trim seals, Mercury 150 EFI trim seals, Mercury Sea Pro trim kit, Mercury Pro XS trim seal kit, Mercury trim cylinder seal kit, Mercury power trim repair kit, Mercury hydraulic O-rings
8M0149746
Electrical / Charging
Genuine Mercury Alternator Belt - 8M0178243
OEM Mercury Alternator Drive Belt for 350-425HP V10 and 500-600HP V12 outboards.
Ensures reliable alternator operation and proper charging of the electrical system.
Compatible Applications
| Brand | Engine | Horsepower | Fitment Note |
|---|---|---|---|
| Mercury | V10 | 350-425 HP | Alternator Drive Belt |
| Mercury | V12 | 500-600 HP | Alternator Drive Belt |
Important Fitment Note
Always confirm compatibility using your engine serial number before ordering.
OEM & Cross Reference Numbers
| OEM | 8M0178243 |
What This Part Is Used For
This belt drives the alternator on Mercury high-horsepower V10 and V12 outboards.
Replacing a worn belt prevents charging system failure and accessory drive slippage.
Key Features and Benefits
- Genuine Mercury OEM quality
- Designed for high-horsepower V10 & V12 engines
- High strength and heat resistance
- Ensures reliable electrical system performance
FAQ
What engines does this belt fit?
Mercury 350-425HP V10 and 500-600HP V12 outboards.
How often should the alternator belt be replaced?
Inspect at regular service intervals and replace if cracked, glazed, or stretched.
Dealer Discounts & Store Policies
Dealer / Marine Industry Discounts
Are you a marine dealer, technician, boat builder, or industry professional? We offer dealer pricing for qualified marine businesses.
Shipping Policy
- Free shipping on orders over $100 continental U.S.
- Orders ship via UPS, USPS, and FedEx.
- Orders received before 5:30 PM EST ship the same business day.
- Typical delivery time is 1-5 business days.
30-Day Return Policy
- Returns accepted within 30 days of delivery.
- Parts must be new, unused, and in original packaging.
- Installed parts are not returnable.
- Return authorization is required before sending items back.
Need help with a return or order question?
Contact Us
Phone: 941-721-3000
Searchable Terms
Mercury V10 alternator belt, Mercury V12 alternator belt, 8M0178243, 350-425HP V10 belt, 500-600HP V12 belt
Searchable Part Numbers
8M0178243
8M0051369
8M0061369
8M0061424
8M0078623
8M0078630
8M0078636
8M0078642
8401661
845282
8452821
857493A01
857493A1
857495A01
857495A1
858053KC1
858053K01
858053QC1
858053Q01
858056KC1
858056K01
858056QC1
858056Q01
858088KC1
858088K01
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883723K01
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883725K01
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0504080
0504081
0764364
0764365
0765720
0772733
0775594
0775597
0779434
18-9420-3
18-94203
764365
765720
779434
8M0078616
8M0078617
8M0078618
8M0078625
8M0078626
8M0078632
8M0078638
802833A1
802833A40
802833Q1
802833Q40
802835A1
802835A30
802835Q1
802835Q30
802836A1
802836A4
802836Q1
802836Q4
828000A40
828002A40
857391A01
857391A1
857471A1
858045K01
858045Q01
858046KC1
858046K01
858046QB1
858046QC1
858046Q01
858047KC1
858047K01
858047QC1
858047Q01
883696A01
883696A1
883697A1
9-82351
3859020
8M0087834
885165
