FAST SHIPPING
On Orders Over $99
EXPERT SUPPORT
⌕ TRACK ORDER 🛒 CART (0)

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.
117-6H4-21 is a replacement ignition power pack used on 40 HP Yamaha 1984-88 3 cylinder models. Helps correct intermittent ignition failure and rough running caused by a weak module.
Representative image shown. Brand or product appearance may vary slightly depending on current inventory.

Part #: 117-6H4-21
Yamaha40 HPPower PackWeight: 1 lb
3.0 / 5  (7 votes)
117-6H4-21 is a replacement ignition power pack used on 40 HP Yamaha 1984-88 3 cylinder models. Helps correct intermittent ignition failure and rough running caused by a weak module.
List Price: $684.69
Your Price: $647.95
Normally In Stock

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

Replaces OEM#'s

6H4-85540-20-00, 6H4-85540-21-00

Product Details

Built for harsh outboard environments, this ignition module supports consistent spark delivery, smoother acceleration, and dependable ignition operation.

Heavy-duty molded connectors and sealed circuitry are designed to maintain dependable electrical performance in demanding outboard operating conditions.

Features

  • Designed for stable spark sequencing
  • Supports dependable ignition performance across varying RPM ranges
  • Sealed epoxy-potted marine construction
  • Marine-grade vibration and moisture resistance

Common Symptoms of a Failing Power Pack

  • Hard starting conditions
  • Sudden ignition failure after warm-up
  • Engine misfire under load
  • Rough idle or hesitation

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.