50-99417A2 Aftermarket Mercruiser Starter Motor | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket MerCruiser GM marine starter motor - Part Number: 50-99417A2

A 12-volt marine starter for selected early MerCruiser GM inline-four, V6 and V8 engines using the smaller 12.75-inch flywheel and straight-across lower mounting pattern. The original nine-tooth 50-99417A2 assembly has been replaced in Mercury service by conversion kit 8M0090697.

The later kit uses an eleven-tooth starter with dedicated bracket and fasteners. A bare replacement motor must not be substituted unless the pinion, nose, bolt pattern and flywheel engagement are confirmed.

⚙️ Key Features

• 12V ignition-protected marine starter

• Historical nine-tooth configuration

• Straight-across two-bolt mounting

• Commonly used with a 12.75-inch flywheel

• Current service conversion available as kit 8M0090697

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 8M0090697 → Supersedes 50-99417A2

OEM / Related Numbers:

• Mercury/MerCruiser: 50-99417A2

• Mercury/MerCruiser: 99417A2

• Aftermarket electrical reference: AS-PL S1280S

• BV PSH: 830.539.092.030

Aftermarket / Verified Equivalents:

• Recmar: REC50-99417A2

• AS-PL: S1280S

• BV PSH: 830.539.092.030

• Aftermarket conversion kit equivalent to Mercury 8M0090697

🚤 Compatibility

Commonly used on:

• Early GM-based MerCruiser sterndrive and inboard petrol engines with the straight-across starter pattern

Typically suits:

• Engine models:

• MerCruiser 120 / 2.5L inline-four

• MerCruiser 140 / 3.0L inline-four

• MerCruiser 3.0L and 3.0LX

• MerCruiser 185 4BBL 4.3L V6

• MerCruiser 200, 228 and 230 V8

• MerCruiser 260 V8

• MerCruiser 300 Tempest

• MerCruiser 898

• HP Range: Approximately 120HP-300HP

• Engine Type: GM inline-four, V6 and V8 marine petrol engine

• Year Range: Approximately 1982-1995, model dependent

• Flywheel/Mounting: 12.75-inch flywheel and straight-across lower bolt pattern

🔌 Function

The starter engages the flywheel and cranks the engine while meeting marine ignition-protection requirements. The current conversion kit also ensures the later starter is positioned correctly relative to the ring gear.

Common signs of failure:

• No crank or only a solenoid click

• Slow cranking under compression

• Starter pinion grinds against the flywheel

• Starter stays engaged after the engine starts

• Cracked mounting nose or loose conversion hardware

📦 Condition

• Brand-new aftermarket ignition-protected starter motor or conversion assembly

• Supplied as the replacement configuration specified for the listing

• Confirm flywheel size, straight bolt pattern and whether conversion hardware is required