Engine Parts - Pulleys

Billet Serpentine Pulley Kit
Your Price:
$699.99

Billet 454/502 Mercury Serpentine Pulley Kit

421-301K

Billet 454/502 Mercury Serpentine Pulley Kit

This kit comes with:

  • 1 - Crankshaft pulley
  • 1 - Circulating pump pulley
  • 1 - Sea pump pulley
  • 1 - Power steering pulley
  • 1 - Alternator pulley
  • 1 - Idler pulley

All pulleys are CNC machined and highly polished. NOTE: This kit will not retrofit V-Belt Pulley Systems to Serpentine. It is to replace existing Serpentine setups only!


3-Groove Billet Crankshaft Pulley For Big Block Chevy
Your Price:
$119.95

Billet Aluminum Circulating Water Pump 3 Groove V-Belt Pulley

421-217

Chevy V6/V8 Billet Aluminum Circulating Water Pump 3 Groove V-Belt Pulley

This beautiful show quality pulley is machined from 6061-T6 Aluminum and polished to a high lustre. This pulley is Direct replacement for Mercruiser pulley 15120T and fits all 4.3L-V6, 305/350 V8, as well as 454/502 BBC V8's. The diameter is 5.5" and the mounting bolt centers are 2-1/8"


Billet 454 / 502 Serpentine Circ Pump Pulley
Your Price:
$199.99

Billet Serpentine Circ Pump Pulley

625-4059

  • Made from Billet Aluminium
  • 5-5/8" Outside Diameter
  • 1-3/4" Bolt Circle
  • Highly Polished
  • 1-1/8" Pulley Groove
  • 3" Tall

Billet 454 / 502 Serpentine Circ Pump Pulley
Your Price:
$229.99

Billet Stock 454 / 502 Serpentine Circ Pump Pulley

421-218

  • Made from Billet Aluminium
  • FITS Stock Mercury Pump Only
  • 2-1/8" Bolt Circle
  • Polished Finish
  • 4 Bolt Mount
  • Smooth Belt Running Surface
  • 6" Diameter
  • 1-1/8" Belt Surface Height
  • 1-1/2" Overall Height


Billet V-Groove Engine Pulley Kit For Mercury Big Block Chevy Generation 4

Your Price:
$469.99

This Part has options, please click the button below to order.

Billet V-Groove Engine Pulley Kit For Mercury Big Block Chevy Generation 4

421-201K

Billet V-Groove Engine Pulley Kit For Mercury Big Block Chevy Generation 4

This kit includes:

  • (1) 3-groove crankshaft front pulley
  • (1) Sea pump pulley
  • (1) Power steering pulley with mandrel
  • (1) Alternator Pulley. Note: Please indicate what style alternator shaft you have for the correct pulley.

At Hardin Marine we manufacture the finest high speed deep groove engine pulleys available. Each pulley is manufactured from 6061-T6 billet aluminum using Tru-Trac technology. Tru-Trac allows the V-belt to ride deep in the belt groove for maximum belt contact. Both the power steering and sea pump pulley use mandrel mounting features that protect the pulley from undue shaft heat. The most common cause for failure in lesser quality pulleys is caused from heat transferring to the pulley releasing from the shaft causing undue damage and safety hazards. All Hardin Marine shaft mount style pulleys use mandrels assuring you the best money can buy.


Billet V-Groove Engine Pulley Kit For Mercury Big Block Chevy Generation 5 & 6

Your Price:
$487.99

This Part has options, please click the button below to order.

Billet V-Groove Engine Pulley Kit For Mercury Big Block Chevy Generation 5 & 6

421-202K

Billet V-Groove Engine Pulley Kit For Mercury Big Block Chevy Generation 5 & 6

This kit includes:

  • (1) 3-groove crankshaft front pulley
  • (1) Sea pump pulley
  • (1) Power steering pulley with mandrel
  • (1) Alternator Pulley. Note: Please indicate what shaft style your alternator has for the correct pulley.

At Hardin Marine we manufacture the finest high speed deep groove engine pulleys available. Each pulley is manufactured from 6061-T6 billet aluminum using Tru-Trac technology. Tru-Trac allows the V-belt to ride deep in the belt groove for maximum belt contact. Both the power steering and sea pump pulley use mandrel mounting features that protect the pulley from undue shaft heat. The most common cause for failure in lesser quality pulleys is caused from heat transferring to the pulley releasing from the shaft causing undue damage and safety hazards. All Hardin Marine shaft mount style pulleys use mandrels assuring you the best money can buy.


Mando Alternator Pulley
Your Price:
$99.99

Delco Alternator Pulley

421-216

Delco Alternator Pulley - Straight Shaft

Hardin Marine has the correct billet alternator pulley for your Delco alternator. Just slide yours off and replace it with Hardin polished billet pulley.

Please Note: the pulley overall dia. is 5", the belt portion is 3-1/4" outer dia.


Dowel Keyway Pin for 625-4001 Mandrel
Your Price:
$3.99

Dowel Keyway Pin for 625-4001 Mandrel

625-4000

Dowel Keyway For Multi-Stage Sea Pump Mandrel.


Mercury 600/662/700 Upper Blower Pulley 3.50
Starting From:
$299.99
This Part has options, please click the button below to order.

Mercury 600 / 662 / 700 Upper Blower Pulley

625-822 + Option(s)

Mercury 600/662/700 Upper Blower Pulley

Billet aluminum blower pulley, 3.25" or 3.50" diameter.

Pulley Mandrel For Multi-Stage Sea Pumps
Your Price:
$29.99

Pulley Mandrel For Multi-Stage Sea Pumps

625-4001

Pulley Mandrel with Keyway For Multi-Stage Sea Pumps.


3-Groove Billet Crankshaft Pulley For Big Block Chevy
Your Price:
$115.95

3-Groove Billet Crankshaft Pulley For Big Block Chevy

421-202

3-Groove Billet Crankshaft Pulley For Big Block Chevy

Machined from 6061-T6 billet aluminum. Set up for a Mercury replacementwith deeper v-groove. Comes highly polished. 2" Center hole.

Diameter of 5.5".


6-Rib Serpentine Crankshaft Pulley for Big Block Chevy
Your Price:
$194.99

6-Rib Serpentine Crankshaft Pulley for Big Block Chevy

625-8176

6-Rib Serpentine Crankshaft Pulley for Big Block Chevy (Mercury HP500 Engine Spacing), Polished

These are billet crankshaft pulleys that are CNC precision machined from 6061 T-6 billet aluminum.  1-3/4" thick


Small Block Chevy 3 V-Groove Crank Pulley
Your Price:
$109.99

Big Block Chevy 3 V-Groove Crank Pulley

421-215

BB Chevrolet 3 V-Groove Billet aluminum OEM style Crankshaft Pulley. This pulley fits Chevrolet 454 7.4L and 502 8.2L late model applications. Replaces Mercruiser Part #90081T1 and casting # 90081C.

Pulley Specifications:
  • 2.25" thick from damper face to front of pulley
  • 1st groove (alternator) 6.60" diameter
  • 2nd groove (sea pump) 5.05" diameter
  • 3rd groove (power steering) 6.60" diameter

Billet 2-groove Crankshaft Pulley for BBC with 6-bolt Supercharger Pulley Mount
Your Price:
$147.99

Billet 2-groove Crankshaft Pulley for BBC with 6-bolt Supercharger Pulley Mount

625-8100

Billet 2-groove Crankshaft Pulley for Big Block Chevy with 6-bolt Supercharger Pulley Mount

Machined from 6061T billet aluminum Set-up for a Mercury replacement with deeper V-groove Comes hard coat anodized black.


Billet 3-groove Crankshaft Pulley
Your Price:
$246.99

Billet 3-Groove Supercharger Crankshaft Pulley

625-8125

Billet 3-Groove Supercharger Crankshaft Pulley

  • Set up for a Mercury replacement with smaller center groove
  • 6-Bolt Hub for Supercharger Mount
  • CNC precision machined from 6061 T-6 billet aluminum.
  • Black Anodized

Crankshaft Pulley, BBC 2-Groove 5" Diameter
Your Price:
$87.95

Crankshaft Pulley, BBC 2-Groove 5" Diameter

755-8200

Crankshaft Pulley, B/B Chevy 2-Groove 5" Diameter With 6-Bolt Supercharger Pulley Mount

Single Groove Billet Crankshaft Pulley For Big Block Chevy
Your Price:
$69.99

Single Groove Billet Crankshaft Pulley For Big Block Chevy

421-841

Single Groove Billet Crankshaft Pulley For Big Block Chevy

  • Machined from 6061-T6 billet aluminum. 
  • Set up for a Mercury replacement with deeper v-groove. 
  • Comes highly polished.
  • 6-7/16" Diameter
  • 7/8" Height

Small Block Chevy 3 V-Groove Crank Pulley
Your Price:
$109.99

Small Block Chevy 3 V-Groove Crank Pulley

421-214

SB Chevrolet 3 V-Groove Billet aluminum OEM style Crankshaft Pulley. This pulley fits Chevrolet V6 4.3L, 305 5.0L and 350 5.7L applications all years with a "V" belt. Replaces Mercruiser Part #90081A1 (OEM casting number 90081C)

Pulley Specifications:
  • 2.25" thick from damper face to front of pulley
  • 1st groove (alternator) 6.60" diameter
  • 2nd groove (sea pump) 5.05" diameter
  • 3rd groove (power steering) 6.60" diameter

Big Block Chevy Generation 4 Sea Pump Pulley
Your Price:
$154.99

Big Block Chevy Generation 4 Sea Pump Pulley

625-4024

Big Block Chevy Generation 4 Sea Pump Pulley (Mandrel not needed)

All Hardin Marine sea pump pulleys for Gen 4 &; 5 V-groove belts use amandrel on the pump, then the pulley bolts to the mandrel. Somemanufacturers sell you a press-on pulley, these usually work themselves off.

Pulley diameter of 6.5".


Big Block Chevy Generation 5 Sea Pump Pulley
Your Price:
$89.99

Big Block Chevy Generation 5 Sea Pump Pulley

421-205

Big Block Chevy Generation 5 Sea Pump Pulley (Needs Mandrel To Mount)

All Hardin Marine sea pump pulleys for Gen 4 & 5 V-groove belts use a mandrel on the pump, then the pulley bolts to the mandrel. Some manufacturers sell you a press-on pulley, these usually work themselves off.

Pulley has the diameter of 5.5".