Sierra 18-5913-1 Marine Starter for GM V-8 Engines, 12 3/4 Inch Flywheel

The Sierra 18-5913-1 is a marine starter engineered for GM V-8 powered stern drive and inboard engines, built to hold up against the corrosion, moisture, and vibration that shorten the life of automotive-grade starters. It is designed for a 12 3/4 inch flywheel and covers a wide range of GM V-8 engine families including 454 Mag., 454 Mag. MPI, 454 Mag. MPI MIE, 454 EFI Ski, 465, 500, 500 Bulldog, and 502 Mag. Models across multiple production serial-number ranges.

This starter has been re-engineered from earlier designs to address the most common marine starter failure points. It features an improved solenoid design for more reliable engagement, an upgraded connection between the solenoid and commutator brushes, an upgraded planetary seal to help reduce water intrusion, and a more robust clutch gear spring to extend service life under repeated cranking cycles. The housing and internal components are metal construction, and the unit weighs 9.1 pounds with overall dimensions of 11.6 x 7.7 x 6.6 inches. It draws 1.4 kilowatts and is backed by a limited lifetime warranty.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-5913-1
• Material: Metal
• Weight: 9.1 pounds
• Dimensions: 11.6 x 7.7 x 6.6 inches
• Wattage: 1.4 kilowatts
• Flywheel Size: 12 3/4 inches
• Engine Compatibility: GM V-8
• Warranty: Limited Lifetime
• UPC: 808282377786

Fitment

• 454 Mag. GM V-8, 1986-1994 (serial range A631894-F304999)
• 454 Mag. GM V-8, 1995-1997 (serial range F305000-K999999)
• 454 Mag. MPI GM V-8, 1994-1997 (serial range F115700-K999999)
• 454 Mag. MPI GM V-8, 1998 & Up (serial L010029 & Up)
• 454 Mag. MPI MIE GM V-8, 1996-1997 (serial range F820100-K999999)
• 454 EFI Ski GM V-8, 1995-1996 (serial range F215800-F820099)
• 465 GM V-8, 1990-1994 (serial range C849992-F213244)
• 500 GM V-8, 1994-1997 (serial F213293 & Up)
• 500 Bulldog GM V-8, 1990-1996 (serial C577254 & Up)
• 502 Mag. Bravo GM V-8, 1990-1993 (serial range C878221-F114528)
• 502 Mag. MPI GM V-8, 1993-1997 (serial range D840650-K999999)
• 502 Mag. MPI GM V-8, 1998 & Up (serial L017000 & Up)

Frequently Asked Questions

What engines does the Sierra 18-5913-1 starter fit? The 18-5913-1 fits GM V-8 marine engines across several families, including 454 Mag., 454 Mag. MPI, 454 Mag. MPI MIE, 454 EFI Ski, 465, 500, 500 Bulldog, and 502 Mag., spanning production years from 1986 through 1998 and up depending on the specific engine serial number range.

What size flywheel does this starter require? This starter is designed for a 12 3/4 inch flywheel, matching the late model GM V-8 configuration it is built for.

How much does the 18-5913-1 starter weigh? It weighs 9.1 pounds.

What are the dimensions of the Sierra 18-5913-1 starter? It measures 11.6 x 7.7 x 6.6 inches.

What is the starter housing made of? The 18-5913-1 is constructed of metal for durability in marine engine compartments.

What electrical rating does this starter draw? The 18-5913-1 is rated at 1.4 kilowatts.

Is this starter an improvement over older marine starter designs? Yes, the 18-5913-1 has been re-engineered with an improved solenoid design, an upgraded connection between the solenoid and commutator brushes, an upgraded planetary seal to help reduce water intrusion, and a more robust clutch gear spring for longer service life.

Does the 18-5913-1 come with a warranty? Yes, it is backed by a limited lifetime warranty.

How do I know if 18-5913-1 is the correct starter for my 454 Mag. Engine? Confirm your 454 Mag. Engine's serial number falls within one of the covered ranges: A631894-F304999 for 1986-1994, F305000-K999999 for 1995-1997, F115700-K999999 for the MPI variant 1994-1997, or L010029 and up for 1998 and later MPI models, since the 18-5913-1 covers these specific ranges.

What is included when I order the 18-5913-1? Ordering the Sierra 18-5913-1 includes one complete starter unit.

Does the 18-5913-1 fit the 502 Mag. Engine? Yes, it fits the 502 Mag. Bravo GM V-8 (serial range C878221-F114528, 1990-1993) as well as the 502 Mag. MPI GM V-8 for 1993-1997 (serial range D840650-K999999) and 1998 and up (serial L017000 and up).

Is the 18-5913-1 designed to resist water intrusion? Yes, this starter includes an upgraded planetary seal specifically engineered to help reduce water intrusion in marine environments.