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Yamaha Inline 4 Cylinder Sleeve 3.270 OD Advanced Sleeve 1185SA
Yamaha F100/115 Bore 3.118"
MercuryOD 3.270" Length 5.195"
| Quantity | Price |
| 1 | 118.94 |
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
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