Engine Rebuild Kit .030 Over
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Compatible Applications
| Brand | Application | Engine Type | Application Notes |
|---|---|---|---|
| Mercury | 225 DFI 3.0L | 2-Stroke Outboard | Serial range OG590000-OG960499 |
What is Included
| Qty | Included Part | Part Number |
|---|---|---|
| 3 | Pro Piston Kit .030 Port | N9130P |
| 3 | Pro Piston Kit .030 Starboard | N9130S |
| 12 | Rod Bolt (Torque to 30 ft-lb) | RB9000 |
| 6 | Wrist Pin Bearing w/ Washers | WP70-1 |
| 6 | Caged Rod Bearing | 012-1 |
| 2 | Center / Upper Main Bearing | 050 |
| 1 | Crankshaft Seal Kit | 2018 |
| 1 | Lower Main Ball Bearing | 308 |
| 1 | Powerhead Gasket Kit | 4312-2 |
| 1 | Upper Main Bearing | 816 |
| 6 | O-Ring, Cylinder Bore Seal | 8573 |
This is a .030" oversize kit
The pistons are .030" larger than standard, for a finished bore of 3.655". 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, seals, and gaskets needed to rebuild the powerhead on Mercury 225 DFI 3.0L two-stroke outboards, in a .030" oversize configuration.
Key Features and Benefits
- Engine rebuild kit for Mercury 225 DFI 3.0L
- Includes 6 Pro .030" oversize pistons (3 port, 3 starboard)
- Includes wrist pin, rod, and main bearings plus new rod bolts
- Includes crankshaft seals, cylinder bore O-rings, and powerhead gasket kit
Kit Details
- Kit Part Number: 9130-4
- Manufacturer: Pro Marine (Aftermarket)
- Engine Type: 2-stroke, 6-cylinder
- Piston Size: .030" Over
- Finished Bore: 3.655"
- Not Included: Crankcase sealant and needle bearing assembly grease
FAQ
What engines does this kit fit?
This kit fits Mercury 225 DFI 3.0L two-stroke outboards. Confirm your model and serial number before ordering.
Do I need to bore my cylinders?
Yes. The pistons are .030" oversize, so the cylinders must be bored and honed to 3.655". Standard and other oversize kits are also available.
Why are there port and starboard pistons?
This engine uses side-specific pistons, so the kit includes 3 of each. Install each piston on its matching cylinder bank.
Is crankcase sealant included?
No. Crankcase sealant and needle bearing assembly grease are sold separately.
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