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Mercury Outboard Parts
Shop OEM and aftermarket Mercury outboard parts for maintenance, repair, troubleshooting, and complete engine rebuild projects. Browse Mercury marine parts by system, including cooling, fuel delivery, electrical and ignition, internal engine components, lower unit parts, steering, trim, and routine service items.
Pro Marine USA carries Mercury outboard engine parts for a wide range of 2-stroke, FourStroke, EFI, Optimax, Pro XS, SeaPro, and Verado applications. Use your engine horsepower, model, serial number, or OEM part number whenever possible to confirm fitment before ordering.
Shop Mercury Outboard Parts by System
- Complete Powerheads
- Control Cables & Boxes
- Cooling System
- Cowlings & Components
- Electrical System
- Engine Oil
- Engine Rebuild Kits
- Fuel & Carburetion System
- Intake System
- Internal Engine Components
- Lower Unit Components
- Oiling System
- Paints
- Service & Oil Change Kits
- Service Manuals
- Steering Systems
- Throttle Components
- Transom & Midsection
- Trim System
- Wizard Performance Parts
Find the Correct Mercury Outboard Part
Mercury outboard parts can vary by horsepower, engine family, model year, and serial number range. If you are unsure which component fits your engine, use the OEM parts lookup to locate the original Mercury part number from an engine diagram.
Once you have the OEM part number, search Pro Marine to find available genuine Mercury and aftermarket replacement options.
Use Our OEM Parts Lookup »Common Mercury Outboard Engine Families
Pro Marine supports many Mercury outboard applications across a wide horsepower range. Always confirm the engine serial number and model information before ordering parts.
- Portable and Midrange: Mercury 2.5HP through 60HP 2-stroke and FourStroke applications
- FourStroke and EFI: common 75HP through 300HP Mercury EFI and FourStroke platforms
- Pro XS: performance-oriented Mercury Pro XS outboards across multiple engine families
- Optimax: direct-injected 2-stroke Mercury Optimax engines, commonly 75HP through 250HP
- Verado: supercharged and naturally aspirated Mercury Verado applications from 135HP through current high-horsepower platforms
- SeaPro: commercial-duty Mercury SeaPro outboards used in professional and high-hour applications
Common Mercury Outboard Repair Areas
- Overheating: inspect the water pump, impeller, thermostat, poppet valve, cooling passages, and related cooling components.
- Hard starting or rough running: inspect fuel pumps, filters, injectors or carburetors, spark plugs, coils, sensors, and intake components.
- No spark or intermittent ignition: check ignition coils, stators, switch boxes, trigger assemblies, sensors, grounds, and wiring.
- Low compression or power loss: inspect pistons, rings, cylinders, bearings, gaskets, reeds, and internal engine components.
- Lower unit noise or water intrusion: inspect seals, bearings, gears, shafts, bearing carriers, and gear lube condition.
- Trim or steering problems: inspect trim motors, pumps, hydraulic components, steering cylinders, hoses, and related rigging parts.
Why Buy Mercury Outboard Parts from Pro Marine USA?
- OEM Mercury and aftermarket replacement options for many common applications.
- Parts for maintenance, repair, engine rebuilding, lower units, electrical systems, fuel systems, steering, trim, and rigging.
- OEM diagram and part-number lookup tools to help identify the correct part before ordering.
- Dealer pricing available for qualified marine repair businesses and dealers.
- Large inventory of Mercury service parts and hard-to-find marine engine components.
- Fast weekday shipping on qualifying in-stock orders.
Frequently Asked Questions
How do I find the correct Mercury outboard part?
Use the engine horsepower, model, serial number, and year whenever available. Mercury frequently uses serial-number ranges to identify engine families, so the serial number is often the most reliable way to confirm fitment.
Can I search Mercury parts by OEM part number?
Yes. Enter the Mercury OEM part number into the Pro Marine site search to locate available OEM and aftermarket replacement options. If you do not know the part number, use the OEM parts lookup first.
Do Mercury outboard parts vary by serial number?
Yes. Many Mercury components change by serial-number range even within the same horsepower or model family. Always compare the serial range listed for the part with your engine before ordering.
Do you carry parts for Mercury Optimax and Verado engines?
Yes. Pro Marine carries parts for many Mercury Optimax, Verado, Pro XS, EFI, FourStroke, and SeaPro applications, including maintenance, fuel, electrical, cooling, internal engine, lower unit, steering, and rigging components.
Do you carry both OEM and aftermarket Mercury parts?
Yes. Pro Marine offers genuine Mercury parts along with aftermarket replacement parts for many common Mercury outboard maintenance, repair, and rebuild applications.
What Mercury outboard parts are commonly replaced during routine maintenance?
Common maintenance items include engine oil, oil filters, fuel filters, spark plugs, water pump kits, impellers, thermostats, gear lube, drain plug seals, anodes, and manufacturer-specific service kit components.
Fitment Tip: Mercury outboard parts often vary by serial-number range. Confirm your engine serial number and OEM part number whenever possible before ordering.
702755015673
8M0067804
892790A01
18-79905
18-79981
24400
24501
5034995
69J-24501-00-00
69J-24501-10-00
769710
888279
Advanced Sleeve Yamaha Inline 4-Cylinder Replacement Sleeve
Yamaha Inline 4-Cylinder 4-Stroke Cylinder Sleeve - Advanced Sleeve 1185SC
The Advanced Sleeve 1185SC is an aftermarket replacement cylinder sleeve for compatible Yamaha inline 4-cylinder four-stroke outboard engines.
This straight cylinder sleeve has a 3.310" outside diameter, 3.118" bore, and 5.195" overall length.
Pro Marine also stocks the 1185SA version, which uses the same 3.118" bore and 5.195" length but has a smaller 3.270" outside diameter.
The key difference between the 1185SC and 1185SA sleeves is the outside diameter.
1185SC = 3.310" OD
1185SA = 3.270" OD
Specifications
| Specification | Details |
|---|---|
| Manufacturer | Advanced Sleeve |
| Part Number | 1185SC |
| Application | Yamaha Inline 4-Cylinder 4-Stroke |
| Outside Diameter | 3.310" |
| Bore | 3.118" |
| Length | 5.195" |
| Brand Type | Aftermarket |
Yamaha Inline 4-Cylinder Application
The Advanced Sleeve 1185SC is designed for compatible Yamaha inline 4-cylinder four-stroke powerheads.
Cylinder sleeves are typically used during major powerhead rebuilding when the original cylinder wall is too worn, scored, corroded, damaged, or previously machined beyond the point where a normal oversize piston repair is practical.
The 1185SC uses the larger 3.310" outside diameter.
Do not select a cylinder sleeve only by horsepower or piston bore size. The engine block must be measured to determine the required sleeve outside diameter and machining dimensions.
If the block requires the smaller 3.270" OD, use the 1185SA sleeve linked below.
Alternate 3.270" OD Cylinder Sleeve
Advanced Sleeve 1185SA - 3.270" Outside Diameter
Alternate replacement sleeve for compatible Yamaha inline four-cylinder four-stroke powerheads.
Outside Diameter: 3.270"
Bore: 3.118"
Length: 5.195"
The 1185SA uses a .040" smaller outside diameter than the 1185SC while retaining the same nominal bore and length.
1185SC vs. 1185SA Cylinder Sleeve
| Specification | 1185SC | 1185SA |
|---|---|---|
| Outside Diameter | 3.310" | 3.270" |
| Bore | 3.118" | 3.118" |
| Length | 5.195" | 5.195" |
| Manufacturer | Advanced Sleeve | Advanced Sleeve |
| Primary Difference | Larger OD | Smaller OD |
What a Replacement Cylinder Sleeve Does
A replacement cylinder sleeve restores the cylinder wall when the original bore is no longer suitable for normal rebuilding. The damaged cylinder area is machined to accept the replacement sleeve, allowing the block to be repaired instead of discarded.
Once installed, the sleeve is bored and honed to the correct finished size for the piston that will be used in the rebuilt engine.
When the 3.310" OD Sleeve May Be Used
The larger outside diameter of the 1185SC provides additional material for applications where the block has been machined larger, has suffered more extensive cylinder-wall damage, or requires the larger sleeve outside diameter during the repair process.
The machine shop should determine which sleeve outside diameter is appropriate after inspecting and measuring the block.
Common Reasons to Install a Cylinder Sleeve
- Deep piston or cylinder-wall scoring
- Broken piston or piston-ring damage
- Severe cylinder corrosion
- Excessive cylinder taper
- Excessive out-of-round condition
- Damage beyond available oversize piston dimensions
- Previously bored cylinder requiring restoration
- Major Yamaha powerhead rebuilding
Machine Shop Installation
Cylinder sleeve installation requires precision machining. The engine block must be measured and machined for the correct sleeve fit before installation.
After the sleeve is installed, the cylinder must be bored and honed to the proper finished dimension and piston-to-wall clearance for the piston being installed.
Standard or Oversize Piston After Sleeving?
One advantage of installing a replacement sleeve is that the machinist can finish the repaired cylinder for the piston size selected for the rebuild.
Depending on the engine, piston availability and condition of the remaining cylinders, the sleeved cylinder may be finished for a standard or compatible oversize piston.
Parts to Inspect During a Cylinder Sleeve Repair
- Pistons and piston size
- Piston rings
- Finished cylinder bore
- Piston-to-wall clearance
- Connecting rods
- Connecting rod bolts
- Connecting rod bearings
- Crankshaft main bearings
- Crankshaft journals
- Cylinder head and sealing surface
- Valves and valve stem seals
- Powerhead gaskets and seals
Shop Yamaha Engine Rebuild Parts by Model
Pro Marine stocks the internal engine components commonly needed alongside cylinder sleeves, including pistons, piston rings, crankshaft bearings, connecting rod bearings, valves, head gaskets and complete powerhead gasket kits.
Yamaha Outboard Engine Rebuild Parts by Model
Browse rebuild components organized by Yamaha engine family and horsepower. This is the easiest way to locate the pistons, rings, bearings, sleeves, valves and gasket components used with your engine.
Key Features and Benefits
- Advanced Sleeve aftermarket replacement cylinder sleeve
- Part number 1185SC
- Designed for compatible Yamaha inline 4-cylinder four-stroke engines
- 3.310" outside diameter
- 3.118" bore
- 5.195" overall length
- Larger OD option compared with 1185SA
- Can restore cylinders with severe bore damage
- Designed for professional machine-shop installation
- Can be finish-machined for the appropriate rebuild piston
- 1185SA 3.270" OD sleeve linked above
- Yamaha engine rebuild parts by model linked above
FAQ
What engines does Advanced Sleeve 1185SC fit?
It is designed for compatible
Yamaha inline 4-cylinder four-stroke engines.
What is the outside diameter of 1185SC?
The 1185SC has a 3.310" outside diameter.
What is the bore size of 1185SC?
The listed bore is 3.118".
How long is the sleeve?
The sleeve is 5.195" long.
What is the difference between 1185SC and 1185SA?
The main difference is outside diameter.
1185SC is 3.310" OD, while
1185SA is 3.270" OD.
Are the bore and length the same on both sleeves?
Yes. Both sleeves are listed with a 3.118" bore and
5.195" length.
How much larger is the 1185SC outside diameter?
The 1185SC is .040" larger in outside diameter than
the 1185SA.
How do I know which sleeve I need?
The engine block should be measured by the machine shop performing the
repair. Sleeve selection is based on the block condition and required
outside diameter, not simply horsepower.
Does the sleeve require machining after installation?
Yes. The installed sleeve must be bored and honed to the required finished
size and piston clearance for the rebuild.
Where can I find the pistons, bearings and gaskets for my Yamaha?
Use the
Yamaha Engine Rebuild Parts by Model
section linked above.
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 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 or machined parts are not returnable.
- Return authorization is required before sending items back.
Need help determining which sleeve you need?
Contact Pro Marine
Phone: 941-721-3000
Searchable Terms
1185SC, Advanced Sleeve 1185SC, Yamaha cylinder sleeve, Yamaha inline 4 cylinder sleeve, Yamaha inline four cylinder sleeve, Yamaha 4 stroke cylinder sleeve, Yamaha outboard cylinder sleeve, Yamaha powerhead sleeve, Yamaha engine sleeve, 3.310 cylinder sleeve, 3.310 OD sleeve, 3.118 bore sleeve, 5.195 cylinder sleeve, Advanced Sleeve Yamaha, Yamaha F75 cylinder sleeve, Yamaha F80 cylinder sleeve, Yamaha F90 cylinder sleeve, Yamaha F100 cylinder sleeve, Yamaha F115 cylinder sleeve, Yamaha inline 4 engine rebuild, Yamaha powerhead rebuild, 1185SA, 3.270 OD sleeve, Yamaha rebuild parts, Yamaha engine rebuild parts by model
Advanced Sleeve Yamaha Inline 4-Cylinder Replacement Sleeve
Yamaha Inline 4-Cylinder 4-Stroke Cylinder Sleeve - Advanced Sleeve 1185SA
The Advanced Sleeve 1185SA is an aftermarket replacement cylinder sleeve for compatible Yamaha inline 4-cylinder four-stroke outboard engines.
This straight cylinder sleeve has a 3.270" outside diameter, 3.118" bore, and 5.195" overall length.
Pro Marine also stocks the 1185SC version, which uses the same 3.118" bore and 5.195" length but has a larger 3.310" outside diameter.
The main difference between the 1185SA and 1185SC sleeves is the outside diameter.
1185SA = 3.270" OD
1185SC = 3.310" OD
Specifications
| Specification | Details |
|---|---|
| Manufacturer | Advanced Sleeve |
| Part Number | 1185SA |
| Type | CS |
| Application | Yamaha Inline 4-Cylinder 4-Stroke |
| Outside Diameter | 3.270" |
| Bore | 3.118" |
| Length | 5.195" |
| Brand Type | Aftermarket |
Yamaha Inline 4-Cylinder Application
The Advanced Sleeve 1185SA is designed for compatible Yamaha inline 4-cylinder four-stroke powerheads.
Cylinder sleeves are commonly used during a powerhead rebuild when the original cylinder wall is damaged, excessively worn, scored, corroded, or has already been machined beyond an acceptable oversize repair.
Do not select a cylinder sleeve by horsepower alone.
The block must be measured and the required sleeve outside diameter, finished bore, and overall length verified before machining.
The 1185SA has a 3.270" OD. If the block requires the larger 3.310" OD, use the 1185SC version linked below.
Alternate 3.310" OD Cylinder Sleeve
Advanced Sleeve 1185SC - 3.310" Outside Diameter
Alternate replacement sleeve for compatible Yamaha inline four-cylinder four-stroke powerheads.
Outside Diameter: 3.310"
Bore: 3.118"
Length: 5.195"
The 1185SC uses a .040" larger outside diameter than the 1185SA while retaining the same nominal bore and length.
1185SA vs. 1185SC Cylinder Sleeve
| Specification | 1185SA | 1185SC |
|---|---|---|
| Outside Diameter | 3.270" | 3.310" |
| Bore | 3.118" | 3.118" |
| Length | 5.195" | 5.195" |
| Manufacturer | Advanced Sleeve | Advanced Sleeve |
| Primary Difference | Smaller OD | Larger OD |
What a Replacement Cylinder Sleeve Does
A cylinder sleeve restores the cylinder wall when the original bore cannot be reused or machined successfully. The damaged original cylinder area is machined to accept the replacement sleeve, and the sleeve is then installed and finished to the required piston bore and clearance.
Sleeving can allow an otherwise damaged engine block to be returned to service when a standard or oversize piston repair is no longer practical.
When a Cylinder Sleeve May Be Needed
- Deep cylinder-wall scoring
- Severe piston or ring damage
- Corrosion or pitting in the cylinder wall
- Previous cylinder machining beyond available piston sizes
- Excessive taper or out-of-round
- Localized cylinder-wall damage
- Restoring a damaged block during a complete powerhead rebuild
Machine Shop Installation
Cylinder sleeve installation requires precision block machining. The block should be measured before selecting the sleeve so the correct outside diameter and required interference fit can be determined.
After installation, the replacement sleeve must be bored and honed to the correct finished dimension for the piston being installed.
Parts to Inspect During a Sleeved Powerhead Rebuild
- Pistons and piston size
- Piston rings
- Cylinder bore and finished piston clearance
- Connecting rod bearings
- Connecting rod bolts
- Crankshaft main bearings
- Crankshaft journals
- Cylinder head sealing surface
- Intake and exhaust valves
- Valve stem seals
- Oil passages and lubrication system
- Powerhead gaskets and seals
Shop Yamaha Engine Rebuild Parts by Model
Need pistons, bearings, rings, valves, gaskets or other components for the same rebuild? Use Pro Marine's Yamaha Engine Rebuild Parts by Model section to locate compatible internal engine components.
Yamaha Outboard Engine Rebuild Parts by Model
Browse engine rebuild components organized by Yamaha horsepower and engine family, including pistons, rings, cylinder sleeves, main bearings, connecting rod bearings, valves, gaskets and related powerhead parts.
Key Features and Benefits
- Advanced Sleeve aftermarket cylinder sleeve
- Part number 1185SA
- Fits compatible Yamaha inline 4-cylinder four-stroke powerheads
- 3.270" outside diameter
- 3.118" bore
- 5.195" length
- Type CS
- Designed for professional cylinder-block machining and installation
- Can restore cylinders that cannot be repaired with a normal overbore
- 1185SC larger 3.310" OD sleeve option linked above
- Yamaha rebuild parts by model linked above
FAQ
What engines does Advanced Sleeve 1185SA fit?
It is designed for compatible
Yamaha inline 4-cylinder four-stroke engines.
Verify block and sleeve dimensions before ordering.
What is the outside diameter of 1185SA?
The 1185SA has a 3.270" outside diameter.
What is the bore size?
The nominal bore is 3.118".
How long is the sleeve?
The sleeve length is 5.195".
What is the difference between 1185SA and 1185SC?
The key difference is the outside diameter.
1185SA is 3.270" OD, while
1185SC is 3.310" OD. Both list a 3.118" bore and
5.195" length.
Can I install a cylinder sleeve myself?
Cylinder sleeve installation requires precision machining of the engine
block and final boring/honing of the installed sleeve. This work is
normally performed by an experienced marine machine shop.
Does the sleeve come finished and ready for the piston?
The installed sleeve must be checked and machined to the required finished
bore and piston-to-wall clearance for the piston being used.
Where can I find other Yamaha engine rebuild parts?
Use the
Yamaha Engine Rebuild Parts by Model
section linked above.
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 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 or machined parts are not returnable.
- Return authorization is required before sending items back.
Need help determining which sleeve you need?
Contact Pro Marine
Phone: 941-721-3000
Searchable Terms
1185SA, Advanced Sleeve 1185SA, Yamaha cylinder sleeve, Yamaha inline 4 cylinder sleeve, Yamaha inline four cylinder sleeve, Yamaha 4 stroke cylinder sleeve, Yamaha outboard cylinder sleeve, Yamaha powerhead sleeve, Yamaha engine sleeve, 3.270 cylinder sleeve, 3.270 OD sleeve, 3.118 bore sleeve, 5.195 cylinder sleeve, Advanced Sleeve Yamaha, Yamaha F75 cylinder sleeve, Yamaha F80 cylinder sleeve, Yamaha F90 cylinder sleeve, Yamaha F100 cylinder sleeve, Yamaha F115 cylinder sleeve, Yamaha inline 4 engine rebuild, Yamaha powerhead rebuild, 1185SC, 3.310 OD sleeve, Yamaha rebuild parts, Yamaha engine rebuild parts by model
887865T
LUB-10W30-FC-04
LUB10W30FC04
LUB-10W30-FC-12
8M0078622
8M0078629
8M0078635
8M0078641
857492A1
857494A1
858052KC1
858052K01
858052QB1
858052QC1
858052Q01
858055KC1
858055K01
858055QB1
858055QC1
858055Q01
858087KC1
858087K01
858087Q01
883722K01
883722Q01
883724K01
883724Q01
90hp 1995
120hp 1995
Honda
BF75 1997-1998
BF90 1997-1998
Johnson / Evinrude
100hp Crossflow 1984-1989
120hp Looper 1985
140hp Looper 1985
150hp Crossflow 1978-1989
155hp Crossflow 1985-1999
175hp Crossflow 1986-1987
185hp Crossflow 1984-1985
200hp Looper 1986-1987
235hp Crossflow 1978-1979
225hp Looper 1986-1987
235hp Crossflow 1980-1985
275hp Looper 1985-1987
300hp Looper 1985-1987
Mercruiser
Most Engines
Mercury
Jet 45 1991-1997
50, 55, 60hp Looper 1991-1997
70, 75, 80, 90hp Looper 1987-1993
75hp Crossflow 1984-1986
100hp Looper 1985-1993
115hp Looper 1989-1993
Jet 120 1999-2000
100, 115, 125hp Loope 1994-1998
65, 75, 80, 90, 100, 115, 150hp 4 Stroke 2010-2021
90, 115hp Crossflow 1980-1988
250, 275hp 6 Cylinder 1989-1994
2.0L 135, 150, 175hp 1978-2005
2.4L 150, 175, 200, 225hp 1978-1999
2.5L 105, 110, 115, 135, 140,150, 175, 200, 210, 240hp 1994-2014
3.0L 200, 225, 250,300hp 1995-2018
0778172
18-2002
30550
320862
508520
70019
73838
76868
76868B
775424
778172
8M0204670
85130
91252-ZW1-003