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Crankshaft Oil Seal for Honda GX390, Predator 420 & Big Block Clone Engines
188F-11014-A GX390/420 Clone Oil Seal
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Crankshaft Oil Seal for Honda GX390, Predator 420 & Big Block Clone Engines

Part Number: 34007-00012-00
Online Price: $4.20
GX390 / Predator 420 Crankshaft Oil Seal – OEM Fit
Availability: In Stock.

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Description

Crankshaft Oil Seal for Honda GX390, Predator 420 & Big Block Clone Engines


Maintain proper engine sealing and prevent oil leaks with this OEM-style Crankshaft Oil Seal, designed to fit the crankcase cover and engine block of most Honda GX390 and Big Block Clone engines including the Predator 420and Wildcat 460.


This seal is engineered to tightly fit both the 35mm crankshaft journal and the housing bore, ensuring long-lasting performance and reliability in both stock and performance applications.


Product Specifications:

  • Inner Diameter (ID): ~34.25mm – designed for a tight seal around 35mm crank journals
  • Outer Diameter (OD): ~52.15mm – fits securely into the crankcase or side cover
  • Thickness: ~7.75mm
  • Material: High-temperature, oil-resistant rubber with steel core
  • Type: Factory-style replacement (single-lip design)


Compatible Engines:

  • Honda GX390
  • Predator 420
  • Wildcat 460
  • Other 420cc+ GX390-style Clone Engines

Fits both the PTO (side cover) and magneto (block) side of the crankshaft.


Key Benefits:

  • Reliable seal to prevent oil leaks
  • Fits both sides of the crankshaft (block and cover)
  • Ideal for rebuilds, replacements, and performance upgrades
  • Compatible with racing lawnmowers, pulling tractors, mud boats, and more

FAQ

Q1: Does this fit both sides of the crankshaft?
A: Yes, this seal is designed to fit both the PTO side cover and the magneto side of most GX390-style clone engines.


Q2: Is this an OEM Honda part?
A: This is an OEM-style replacement, made to match factory specs for fit and performance.


Q3: Can I use this on modified or racing engines?
A: Yes! It’s a great choice for both stock rebuilds and performance applications, including racing lawnmowers and pulling tractors.

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