Engine Rebuild Kit .040 Over
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Compatible Applications
| Brand | Application | Engine Type | Application Notes |
|---|---|---|---|
| Yamaha | 3 Cylinder 75–90HP | 2-Stroke Outboard | Confirm fitment with your engine serial number |
What is Included
| Qty | Included Part | Part Number |
|---|---|---|
| 3 | Wiseco Piston Kit .040 | 3131P4 |
| 3 | Wrist Pin Needle Bearing | WP16 |
| 3 | Caged Rod Bearing | 730 |
| 6 | Rod Bolt, 90° | RB4000 |
| 1 | Upper Main Bearing | 636U4 |
| 2 | Center Main Bearing Kit | 835U8 |
| 1 | Lower Main Ball Bearing | 263 |
| 1 | Powerhead Gasket Kit | 2157 |
This is a .040" oversize kit
The pistons are .040" larger than standard, for a finished bore of 3.268". The cylinders must be bored and honed to match the pistons before assembly. Have your machine shop measure the bores and confirm the oversize you need before ordering.
What This Kit is Used For
This Pro Marine engine rebuild kit supplies the pistons, bearings, and gaskets needed to rebuild the powerhead on Yamaha 3 Cylinder 75–90HP two-stroke outboards, in a .040" oversize configuration.
Key Features and Benefits
- Engine rebuild kit for Yamaha 3 Cylinder 75–90HP
- Includes 3 Wiseco .040" oversize pistons
- Includes wrist pin, rod, and main bearings plus new rod bolts
- Includes powerhead gasket kit
Kit Details
- Kit Part Number: 3140K3
- Manufacturer: Pro Marine (Aftermarket)
- Piston Brand: Wiseco
- Engine Type: 2-stroke, 3-cylinder
- Piston Size: .040" Over
- Finished Bore: 3.268"
- Not Included: Crankcase sealant and needle bearing assembly grease
FAQ
What engines does this kit fit?
This kit fits Yamaha 3 Cylinder 75–90HP two-stroke outboards. Confirm your model and serial number before ordering.
Do I need to bore my cylinders?
Yes. The pistons are .040" oversize, so the cylinders must be bored and honed to 3.268". Standard and other oversize kits are also available.
Is crankcase sealant included?
No. Crankcase sealant and needle bearing assembly grease are sold separately.
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