Parts Player Starter for Mercruiser 350 Mag MPI 5.7L (1998–2004) — 12V CCW, 9-Tooth Pinion

Parts Player 50-808011A4 is a replacement 12V CCW starter engineered to fit Mercruiser 350 Mag MPI 5.7L engines (1998–2004) and many related Chrysler-based marine V8 applications.

This starter assembly is a direct-replacement aftermarket unit built to match original equipment fitment and rotation for a range of Mercruiser, Crusader and Bulldog inboard/outboard V8 engines. It ships new from the factory with a nine-tooth pinion, CCW rotation and is intended as a like-for-like swap where OEM part numbers such as 50-808011A05, RA122009, 8000186, 9000888, and SDR0252 are referenced. Review the compatibility list below to confirm match with your engine year and model before installation.

Which engines and years does this starter support?

This Parts Player starter fits multiple Chrysler-derived marine V8s across late-1990s and early-2000s model years. Compatibility covers Mercruiser 350 Mag MPI 5.7L engines from 1998–2004 and numerous other MIE and Horizon configurations listed below.

• Mercruiser 350 Mag MPI, 350 Mag MPI Horizon (1998–2004)
• Crusader 5, 5.7, 6 series (1999–2008) and various Bulldog applications
• Other Chrysler-based V8s including 5.7L EFI (Gen+), 454 Mag MPI (Gen VI) where OEM references match

What are the key specifications and replacement numbers?

The starter is a 12V unit with counterclockwise (CCW) rotation, nine teeth on the pinion and ships as a single piece, new from the factory. It carries numerous cross-references making it suitable where several OEM part numbers are cited.

• Voltage: 12V; Rotation: CCW; Tooth Count: 9
• Unit Series: PG260L; Condition: New; Number of Pieces: 1
• Common cross-references: 50-808011A4, 50-808011A05, RA122009, 8000186, 9000888, SDR0252, 41012198, D8000186

Will this starter drop in or require modifications?

In most cases this Parts Player starter is a bolt-in replacement when cross-reference numbers and engine fitment match your application. Mounting hardware is typically not included, so existing bolts and spacers should be inspected and reused or replaced as needed.

• Mounting hardware: Not included — reuse or purchase correct bolts
• Verify pinion tooth count and rotation before installation to avoid starter damage
• Confirm fit using engine model, year and OEM reference numbers

What should I check before ordering and installing?

Confirm engine model, year, and OEM part references listed here to ensure compatibility. Also inspect the flywheel teeth, starter solenoid connections and battery health — starters perform correctly only with proper battery voltage and clean electrical connections.

• Match OEM numbers such as 50-808011A05, 21129980, 3862985, SDR0252
• Inspect flywheel ring gear and starter mounting points for wear
• Ensure battery is charged and terminals are corrosion-free before testing

Who is this for? This Parts Player 50-808011A4 starter is aimed at boat owners, marine mechanics and restoration professionals needing an economical, OEM-referenced replacement for Chrysler-based Mercruiser V8 powerplants from the late 1990s to early 2000s. If your application lists any of the provided cross-reference numbers or matches the described engine families, this starter provides a practical aftermarket alternative. For precise installation guidance, consult a marine mechanic or your engine service manual.