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Lower Unit Seal Kits for Chrysler Force Outboards
Shop lower unit seal kits for Chrysler Force outboards. Seal kits include the critical oil seals and O-rings needed to prevent water intrusion and keep gear lube contained inside the gearcase.
Why Lower Unit Seal Kits Are Critical
- Prevent water intrusion into the gearcase
- Keep gear lube properly sealed inside the lower unit
- Protect gears and bearings from contamination
- Restore proper sealing during lower unit rebuilds
Common Signs You Need a Seal Kit
- Milky or contaminated gear lube
- Gear lube leaking near the prop or driveshaft
- Failed pressure or vacuum test
- Corrosion damage to internal gears and bearings
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This Pro Marine 1520K engine rebuild kit is designed for Johnson and Evinrude 90 HP through 140 HP V4 crossflow outboard engines produced from 1976 through 1988. This version of the kit includes .020 inch oversize pistons for engines that have had the cylinders bored during machining.
These OMC V4 crossflow engines are widely used on fishing boats and recreational boats and are known for their durability and strong mid range torque. This rebuild kit provides the major internal components needed to restore compression, reliability, and performance when rebuilding a worn or damaged powerhead.
Available Bore Size Options
This engine rebuild kit is available in multiple bore sizes depending on your cylinder condition after machining.
| Part Number | Bore Size | Description |
|---|---|---|
| 1500K | Standard | Standard bore rebuild kit for engines that have not been bored oversize |
| 1520K | .020 Over | For engines bored .020 inches oversize during cylinder machining |
| 1530K | .030 Over | For engines bored .030 inches oversize during cylinder machining |
Always confirm the final cylinder bore size with your machine shop before ordering pistons or rebuild kits.
Compatibility
This rebuild kit fits Johnson and Evinrude V4 crossflow outboard engines rated between 90 HP and 140 HP produced from 1976 through 1988. These engines use a 3.500 inch bore crossflow block and were commonly installed on bass boats, fishing boats, and recreational runabouts.
Application Chart
| Brand | Horsepower | Engine Type | Year Range |
|---|---|---|---|
| Johnson | 90 HP | V4 Crossflow | 1976-1988 |
| Johnson | 115 HP | V4 Crossflow | 1976-1988 |
| Johnson | 140 HP | V4 Crossflow | 1976-1988 |
| Evinrude | 90 HP | V4 Crossflow | 1976-1988 |
| Evinrude | 115 HP | V4 Crossflow | 1976-1988 |
| Evinrude | 140 HP | V4 Crossflow | 1976-1988 |
Engine Model Compatibility
This kit fits OMC V4 crossflow engines with a 3.500 inch cylinder bore. The included pistons are .020 inch oversize and are intended for engines that have been bored during cylinder machining.
What Is Included
Part Numbers and Cross References
Common cross reference numbers associated with this rebuild kit include:
What This Kit Is Used For
This rebuild kit is used during a complete powerhead rebuild on Johnson or Evinrude V4 crossflow outboard engines. It is typically installed when engines require cylinder boring, new pistons, and full internal service due to low compression, piston damage, or high engine hours.
Marine repair shops and engine builders frequently use these kits when restoring classic OMC crossflow engines to reliable running condition.
FAQ
What does .020 over mean?
What engines does this rebuild kit fit?
Does this kit include pistons?
Should I confirm bore size before ordering?
Dealer Discounts
Are you in the marine industry? Pro Marine offers wholesale pricing and dealer discounts for marine repair shops, boat dealers, marinas, and parts retailers.
If your business regularly purchases outboard engine parts, we invite you to apply for a Pro Marine dealer account.
Contact Pro Marine
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