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Outboard Motor Parts | OEM & Aftermarket
Shop OEM and aftermarket outboard motor parts for Mercury, Yamaha, Suzuki, Honda, Johnson / Evinrude / E-TEC, Tohatsu / Nissan, and Chrysler / Force engines. Pro Marine USA carries parts for routine maintenance, troubleshooting, repair, and complete marine engine rebuilds.
Browse by outboard manufacturer or engine system, or use our OEM parts lookup to identify the correct part number before ordering. Find cooling, fuel, ignition, electrical, internal engine, lower unit, steering, trim, service kit, gasket, seal, and rebuild parts in one place.
Shop Outboard Parts by Manufacturer
Chrysler / Force Outboard Parts for Chrysler and Force outboard repair 
Honda Outboard Honda cooling, fuel, electrical, and engine parts 
Johnson / Evinrude / E-TEC Outboard Johnson, Evinrude, E-TEC, and OMC replacement parts 
Mercury Outboard Mercury and Mariner maintenance, repair, and rebuild parts 
Suzuki Outboard Suzuki service, lower unit, fuel, and engine parts 
Tohatsu / Nissan Outboard Tohatsu and Nissan outboard replacement parts 
Yamaha Outboard Yamaha maintenance, repair, lower unit, and rebuild parts Find the Correct Outboard Part
Not sure which part fits your engine? Start with the engine manufacturer, horsepower, model number, serial number, and year whenever available.
Our OEM parts lookup lets you view factory parts diagrams and identify the original part number for many popular outboard engines. Once you have the OEM number, search Pro Marine to find available OEM and aftermarket replacement options.
Use Our OEM Parts Lookup »Shop Outboard Parts by Engine System
Outboard engines use several interconnected systems. Select your manufacturer above to browse the exact categories available for your engine, including the following common repair and maintenance areas.
Common Outboard Problems and Where to Start
- Engine overheating: inspect the water pump, impeller, thermostat, pressure-control components, cooling passages, and engine anodes.
- Hard starting or rough idle: check fuel delivery, carburetor or injector operation, spark plugs, ignition components, filters, and intake sealing.
- Weak spark or no spark: test ignition coils, stators, switch boxes or ignition modules, sensors, wiring, grounds, and related electrical components.
- Low compression or poor power: inspect pistons, rings, cylinder condition, head and powerhead gaskets, bearings, and other internal engine components.
- Milky gear lube: inspect prop shaft, driveshaft, shift shaft, bearing carrier, and other lower unit seals for water intrusion.
- Lower unit or gearcase noise: inspect bearings, gears, clutch components, shafts, and gear lube condition before continued operation.
- Trim or steering problems: inspect hydraulic fluid level, seals, hoses, trim motors, pumps, steering cylinders, and mechanical connections.
Why Buy Outboard Parts from Pro Marine USA?
- OEM and aftermarket replacement options for major outboard engine brands.
- Marine engine parts for routine maintenance, professional repair, and complete rebuild projects.
- OEM diagram and part-number lookup tools to help identify the correct component before ordering.
- Dealer pricing available for qualified marine repair businesses and dealers.
- Large selection of service kits, engine parts, lower unit components, fuel system parts, electrical parts, steering, and rigging products.
- Same-day weekday shipping available on qualifying in-stock orders placed before the shipping cutoff.
OEM and Aftermarket Outboard Parts
OEM parts are supplied by the original engine manufacturer and are designed for the specific engine application. Aftermarket parts are replacement components produced by independent marine parts manufacturers and may provide additional availability or value for many common repairs.
Pro Marine carries both genuine OEM parts and quality aftermarket replacement parts for many outboard maintenance, repair, and rebuild applications. Always confirm fitment using the engine model, serial number, horsepower, year range, or OEM part number when available.
Frequently Asked Questions
How do I find the correct parts for my outboard motor?
Start by identifying the engine manufacturer, horsepower, model number, serial number, and year. Select the manufacturer above to browse by engine system, or use the OEM parts lookup to locate the original part number from a factory diagram.
Can I search Pro Marine by OEM part number?
Yes. If you already have the OEM part number, enter it 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.
What information should I have before ordering an outboard part?
Have the engine manufacturer, horsepower, model number, serial number, and year whenever possible. An OEM part number from the original component or parts diagram is especially helpful because visually similar parts may fit different engine families.
What is the difference between OEM and aftermarket outboard parts?
OEM parts come from the original engine manufacturer. Aftermarket parts are replacement components manufactured by other marine parts companies for compatible applications. Pro Marine carries both OEM and aftermarket options across many common outboard engine systems.
Are aftermarket outboard motor parts reliable?
Quality aftermarket marine parts are commonly used for maintenance, professional repair, and engine rebuilding. The best option depends on the application, manufacturer, availability, and customer preference.
Do you carry parts for older outboard motors?
Yes. Pro Marine carries parts for many older Mercury, Mariner, Johnson, Evinrude, Chrysler, Force, Yamaha, Honda, Suzuki, Nissan, and Tohatsu outboards. Availability varies by engine family and component.
What outboard parts are commonly replaced during routine maintenance?
Common maintenance items include engine oil, oil filters, fuel filters, spark plugs, water pump impellers, complete water pump kits, thermostats, gear lube, drain plug seals, anodes, and manufacturer-specific service kit components.
Fitment Tip: Outboard parts can vary by model, serial range, horsepower, and production year. Confirm the OEM part number or engine identification information whenever possible before ordering.
655-12414
655-12414-A1-00
655-12414-00-00
81031
81031M
66K-13915-00-00
66K-13915-01-00
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
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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
0352960
0387041
0769405
0777367
18-1347
18-1377
18-1377
22855
320499
352960
387041
5007190
777367
878758
878780
88269
88269T
88270
88270A02
88270A1
883270T
887865T
3B7021040
3B7021040M
3T9021040
3T9021040M
346020110M
346020111
346020111M