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Fits 25 HP Johnson/Evinrude 1977-85 models: 133-3387 is a timer base. Helps control ignition timing and cylinder firing position.
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Part #: 133-3387
Evinrude25 HPTimer BaseWeight: 1 lb
4.0 / 5  (11 votes)
Fits 25 HP Johnson/Evinrude 1977-85 models: 133-3387 is a timer base. Helps control ignition timing and cylinder firing position.
List Price: $87.49
Your Price: $61.40
Normally In Stock

In Stock items ship same day if ordered before 3PM CST (excluding weekends and holidays)

Replaces OEM#'s

583387, 584716

Product Details

Designed for reliable spark timing control, this marine timer base helps coordinate ignition advance events for smoother throttle response and stable engine performance.

The assembly uses sealed electronic components and vibration-resistant construction to help maintain stable ignition timing performance under demanding marine operating conditions.

Features

  • Marine-grade sealed construction
  • Vibration-resistant electronic components
  • Precision ignition timing synchronization
  • Helps maintain accurate ignition advance operation

Common Symptoms of a Failing Timer Base

  • Erratic spark timing behavior
  • Hard starting conditions
  • RPM instability under acceleration
  • Ignition timing drift after warm-up

Need Fitment Help?

Tell us your brand, horsepower, and part number. We can help verify fitment before you order.

Support PDF files appear on this page when available.