Fel-Pro 5P591 Valve Stem Seals — Package of 8
New Old Stock (NOS) — Genuine Fel-Pro seals in original, unopened factory packaging. Manufactured in the USA.
Verified Engine Compatibility
These seals are confirmed to fit the following OMC/Johnson/Evinrude outboard engine families:
-
OMC V4 & V6 Loop-Charged Engines — commonly found in Johnson and Evinrude outboards from approximately 1978–1998
- Typical horsepower range: 85 HP – 235 HP (including 85, 88, 90, 100, 110, 115, 120, 140, 150, 175, 200, 235 HP models)
- Applies to engines using the OMC iron-sleeve V4 and V6 powerheads produced during this era
Specific model-year fitment varies. See fitment confirmation prompt below before ordering.
OEM / Cross-Reference Part Numbers Replaced
- Fel-Pro Part Number: 5P591
- Replaces OMC OEM: 0320849 / 320849
- Also cross-references: Sierra 18-4205, GLM 21490
Package Contents
- 8 × Fel-Pro valve stem seals (sufficient for a complete V4 or V6 powerhead valve job)
- Original factory packaging — NOS condition
Installation Notes
- Use a proper valve stem seal installation tool to avoid damaging the seals during installation
- Inspect valve stems for wear or scoring before installing new seals
- Replace valve springs and retainers if showing fatigue — seals alone will not correct excessive valve stem wear
- Torque cylinder head bolts to factory OMC specification for your specific engine year and horsepower
- Recommend replacing all 8 seals as a set during any top-end rebuild
⚠️ Confirm Your Fitment Before Ordering
Valve stem seal fitment depends on your exact engine configuration. Please verify compatibility using all three of the following:
- Your engine's model number (found on the engine ID tag or transom bracket)
- Your engine's serial number
- Your engine's model year
Not sure if this part fits your engine? Contact us before ordering — we're happy to confirm compatibility. This is a New Old Stock item with limited quantity available (1 package in stock).
Warranty
Sold as-is, New Old Stock. Fel-Pro manufacturer's warranty applies where valid for NOS parts. Pine Lake Parts stands behind the authenticity and condition of this item.
