Precision Outboard Powerhead Rebuilds & Marine Parts

Authorized Parts & Rebuilds for Mercury • Johnson • Evinrude • Yamaha • Force • Chrysler

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Mercury 20 HP Boat Harness

Shop OEM and aftermarket Boat Harness for Mercury 20 HP outboard motors. BPS Marine supplies dependable replacement parts backed by years of outboard powerhead rebuilding experience.

Boat Harness for Mercury 20 HP outboard motors are selected to support dependable marine repair and replacement.

Common Symptoms and Service Notes

  • Worn or damaged original parts
  • Performance or reliability concerns
  • Fitment-specific replacement needs

Review product notes, replacement numbers, and compatibility details before purchase.

CDI Electronics Boat harness

Boat harness


Part # 474-9550

Boat harness

This CDI Electronics Boat harness is designed for 20 HP Mercury/Mariner 1973-81 models Outboard Motors with Serial # 3537531 thru 5837436.

Replaces OEM part numbers:
84-822253T20, 45876A10, 45876A15, 45876A20, 84-822253A20, 2964510, 2964515, 2964520, 3912510, 3912515, 3912520, 4587610, 4587615, 4587620, 458765, 822253A20, 822253T20.
Note: 20' harness length and includes 6' battery lead.
(16)
$362.69
$330.05
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