Lucky Seven 332-5772A5 Replacement Power Pack for Mercury 4-Cylinder 30-125HP — Direct-Fit Ignition Module

Lucky Seven 332-5772A5 is a plug-and-play aftermarket power pack that replaces Mercury 332-5772 series switch boxes to restore ignition function on many 4-cylinder outboards (30–125 HP).

If your Mercury outboard is experiencing intermittent spark, hard starting, or sudden stalls, the switch box (power pack) is a common cause. This Lucky Seven replacement is engineered to match the original Mercury form, fit and function for models that used part numbers 332-5772A1/A2/A3/A4/A5/A7, 114-5772 and 18-5881. It’s supplied as a direct replacement so you can swap units without modifying wiring or mounting, making it a straightforward service solution for older 2-stroke 4-cylinder engines and jet-drive variants from the late 1970s through the 1990s.

Which Mercury engines and serial ranges does this part fit?

This power pack covers a broad set of Mercury 4-cylinder outboards and select jet models spanning multiple years and horsepower classes. Check serial numbers and horsepower to confirm fit before ordering.

• Covers 30–125 HP models including 30 HP Jet, 40 HP, 45–50 HP, 80–85 HP, 100–125 HP ranges.
• Compatible serial ranges include C159200, D055048, D283222, B209468, C100000 and others listed in the full compatibility table.
• Fits model years primarily between 1976 and 1997 for the referenced HP classes and jet variants.

How does installation work — is it plug-and-play?

Yes. The Lucky Seven unit is designed as a direct-fit replacement with matching mounting points and connector layout so installers can remove the faulty box and install the new one without splicing or additional adapters.

• Uses the same electrical connector and mounting pattern as Mercury 332-5772 series boxes.
• No reprogramming required — simply unbolt the old pack and bolt in the replacement.
• Ideal for field repair or shop service where quick turnaround is needed.

What ignition issues can this power pack address?

This switch box focuses on restoring reliable spark and timing control when the original unit has degraded. It’s commonly replaced to eliminate intermittent spark, rough running, and engine cutoff linked to a failing power pack.

• Resolves no-spark and intermittent ignition problems tied to the switch box.
• Helps stop hard starts and sudden engine stalls caused by faulty ignition control.
• Restores consistent engine performance when the original pack has electrical faults.

What should I verify before buying to ensure compatibility?

Confirm the Mercury OEM part number on your old switch box or cross-check the engine serial and horsepower against the compatibility list. Ordering the right part avoids returns and ensures a smooth install.

• Compare existing part numbers: 332-5772A1/A2/A3/A4/A5/A7, 114-5772, 18-5881.
• Verify engine model year, horsepower and serial number ranges shown in the compatibility table.
• If uncertain, photograph the old unit and consult a mechanic or the seller before purchase.

Who is this for: This Lucky Seven replacement power pack is made for boat owners, marine technicians and DIY mechanics working on Mercury 4-cylinder outboards (30–125 HP) and select jet-drive models from the late 1970s through the 1990s. It’s intended for anyone needing a reliable, cost-effective aftermarket switch box that installs quickly and returns ignition reliability—especially useful for older boats where OEM parts are scarce or costly. Always validate fit by checking the part number or engine serial range prior to purchase.