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133-1251 is a replacement timer base used on 70 HP Johnson/Evinrude 1973-78 models. Used when timing signal problems cause misfire, hard starting, or poor acceleration.
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Part #: 133-1251
Evinrude70 HPTimer BaseWeight: 2 lb
4.0 / 5  (28 votes)
133-1251 is a replacement timer base used on 70 HP Johnson/Evinrude 1973-78 models. Used when timing signal problems cause misfire, hard starting, or poor acceleration.
List Price: $369.49
Your Price: $360.80
Normally In Stock

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

Replaces OEM#'s

580970, 581251

Product Details

Built for harsh marine environments, this timer base supports dependable ignition timing accuracy and consistent CDI trigger operation.

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

Features

  • Helps maintain accurate ignition advance operation
  • Vibration-resistant electronic components
  • Supports dependable throttle response
  • Designed for stable CDI timing signals

Common Symptoms of a Failing Timer Base

  • Hard starting conditions
  • Engine hesitation or misfire
  • Intermittent ignition timing issues
  • Erratic spark timing behavior

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.