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For 75 HP Johnson/Evinrude 1979-88 models, 133-3378 is a timer base. Used when timing signal problems cause misfire, hard starting, or poor acceleration.
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Part #: 133-3378
Evinrude75 HPTimer BaseWeight: 2 lb
4.0 / 5  (18 votes)
For 75 HP Johnson/Evinrude 1979-88 models, 133-3378 is a timer base. Used when timing signal problems cause misfire, hard starting, or poor acceleration.
List Price: $296.09
Your Price: $269.45
Normally In Stock

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

Replaces OEM#'s

581949, 582724,583060, 583131, 583378, 584269, 584562

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.

Marine-grade insulation materials and sealed trigger components help protect the timer base from humidity, heat cycling, and electrical interference.

Features

  • Helps maintain accurate ignition advance operation
  • Marine-grade sealed construction
  • Designed for stable CDI timing signals
  • Precision ignition timing synchronization

Common Symptoms of a Failing Timer Base

  • Erratic spark timing behavior
  • RPM instability under acceleration
  • Hard starting conditions
  • Engine hesitation or misfire

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.