Accessories - Riser Gaskets

Hardin Manifold to Riser Gasket
Your Price:
$12.99

Hardin Manifold to Riser Gasket - Mercury 27-848147

420-906321

Hardin Manifold to Riser Gasket, Replaces Mercury OEM# 27-848147

Fits: BBC, SBC and Ford manifolds as well. For Gil Replacement, Mercury HP500 and Cyclone Manifold applications.

Original quality Hardin gaskets are the finest anywhere Their graphite impregnated core assures long life. Depending on application up to 2 or 4 may be required on a single engine. When using a turbolator (See related parts) 4 are required.


Hardin Manifold to Riser Gasket for Big Gun Manifolds
Your Price:
$17.99

Hardin Manifold to Riser Gasket for Big Gun Manifolds

420-906330

Hardin Manifold to Riser Gasket for Big Gun Manifolds

Original quality Hardin gaskets are the finest anywhere Their graphite impregnated core assures long life.


Seaward Series Replacement Riser Gasket
Your Price:
$11.99

Seaward Series Replacement Riser Gasket

620-38006

Replacement riser gasket for Hardin Seaward manifolds and risers. 4-1/2" x 3" Bolt pattern.


Log Manifold Block Off Plate 5" O.D
Your Price:
$9.99

Log Manifold Block Off Plate 5" O.D

500-717

  • For Log Manifolds 
  • 5" Outside Diameter 
  • 3" Inside Diameter 
  • 2-15/16" Bolt Hole to Bolt Hole (Adjacent)
  • 4-1/8" Bolt Hole to Bolt Hole (Across)
  • Sold Each
  • Metal Plate

Manifold to Riser Gasket 5'' O.D
Your Price:
$5.99

Manifold to Riser Gasket 5" O.D

500-718

  • For Log Manifolds 
  • 5" Outside Diameter 
  • 3" Inside Diameter 
  • 2-15/16" Bolt Hole to Bolt Hole (Adjacent)
  • 4-1/8" Bolt Hole to Bolt Hole (Across)
  • Sold Each

GLM High Quality Elbow Gasket 27-860233
Your Price:
$5.99

Mercury 3 and 4" Riser Gasket - Restricted Flow 27-860233

700-30240

Mercury 3" and 4" Restricted Flow Riser/Elbow Gasket replaces MerCruiser part # 27-860233

Exhaust Elbow Gaskets have side leakage-proof treatment and sticking proof treatment.

  • Temperature Limit: 1112 F
  • Thickness: 1/16 Inch
  • Density of Sheet:1.309 / cm3
  • Compressibility: 15-35%
  • Recovery: 20% Min.
  • Bolt Holes measure 3-7/16" center to center lengthwise and 3-1/16 center to center width wise. 
  • Restricted water flow.

GLM High Quality Elbow Gasket 27-860233
Your Price:
$10.99

Mercury 3 and 4" Riser Gasket 27-863726

700-32080

Mercury 3" and 4" Open Riser/Elbow Gasket replaces MerCruiser part # 27-863726

Exhaust Riser/Elbow Gaskets have side leakage-proof treatment and sticking proof treatment.

  • Fits 1983-2002 V6 and V8, 3" or 4" riser.
  • Temperature Limit: 1112 F
  • Thickness: 1/16 Inch
  • Density of Sheet:1.309 / cm3
  • Compressibility: 15-35%
  • Recovery: 20% Min.
  • Bolt Holes measure 3-7/16" center to center lengthwise and 3-1/16 center to center width wise. 
  • Open gasket for standard cooling riser.

GLM High Quality Elbow Gasket 27-860231
Your Price:
$12.99

Mercury 3" and 4" Blocked Flow Riser/Elbow Gasket 27-860231

700-30220

Mercury 3" and 4" Blocked Flow Riser/Elbow Gasket replaces MerCruiser part # 27-860231

Exhaust Elbow Gaskets have side leakage-proof treatment and sticking proof treatment.

  • Temperature Limit: 1112 F
  • Thickness: 1/16 Inch
  • Density of Sheet:1.309 / cm3
  • Compressibility: 15-35%
  • Recovery: 20% Min.
  • Bolt Holes measure 3-7/16" center to center lengthwise and 3-1/16 center to center width wise. 
  • Blocks water flow for Closed Cooling applications

Mercury Riser Gaskets (Pair)
Your Price:
$11.99

Mercury Riser Gaskets (Pair)

421-11-1001

MGK Riser GasketsMGK Riser Gaskets. (Sold in pairs)

Elbow Gasket Mercruiser 27-864547A02
Your Price:
$49.99

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

Elbow Gasket Mercruiser 27-864547A02

530-864547A02

Elbow Gasket Mercruiser 27-864547A02

Supersedes: 27-864547A1

Supercedes: 27-864547A1


GASKET-ELBOW Mercruiser 27-864850A02
Your Price:
$49.99

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

GASKET-ELBOW Mercruiser 27-864850A02

530-864850A02

GASKET-ELBOW Mercruiser 27-864850A02

Supersedes: 27-864850A1

Supercedes: 27-864850A1


Late Style Manifold to Riser Gasket
Your Price:
$12.99

Late Style Powerflow Manifold to Riser Gasket

421-RGKN

Late Style Manifold to Riser Gasket (each)

Replacement Powerflow Manifold to Riser Gasket Early Style Round Hole
Your Price:
$10.99

Replacement Powerflow Manifold to Riser Gasket Early Style Round Hole

421-RGK

Replacement Powerflow Manifold to Riser Gasket Early Style Round Hole

These are all the popular IMCO riser gaskets Don't be caught without spares This is a common wear item.


Replacement Powerflow Plus Manifold to Riser Gasket
Your Price:
$10.99

Replacement Powerflow Plus Manifold to Riser Gasket

421-RGKP

Replacement Powerflow Plus Manifold to Riser Gasket (Each)

These are all the popular IMCO riser gaskets Don't be caught without spares This is a common wear item.


Replacement Powerflow Manifold to Riser Gasket Early Style Round Hole
Your Price:
$10.99

Replacement Powerflow Plus Tailpipe Gaskets (Sold as Each)

421-11-1006

Replacement Powerflow Plus Tailpipe Gaskets (Sold as Each)

These are all the popular IMCO riser gaskets Don't be caught without spares This is a common wear item.


Late Style Manifold to Riser Gasket
Your Price:
$10.99

Thumper Manifold to Riser Gasket

421-RGKT

Thumper Manifold to Riser Gasket (each)

IMCO Manifold to Riser Gaskets - Replacement Thumper Power Riser Seal
Your Price:
$3.99

IMCO Manifold to Riser Gaskets - Replacement Thumper Power Riser Seal

421-RGKC

IMCO Manifold to Riser Gaskets - Replacement Thumper Power Riser Seal

These are all the popular IMCO riser gaskets Don't be caught without spares This is a common wear item.


Exhaust Manifold To Riser Gaskets - Indmar Riser Gasket
Your Price:
$9.99

Exhaust Manifold To Riser Gasket - BBC Indmar Riser Gasket

620-24221

Exhaust Manifold To Riser Gaskets - BBC Indmar Riser Gasket (each)

Here is just a sampling of the popular exhaust manifold gaskets that weoffer.  Each gasket is designed to withstand the high temperatures ofmarine exhaust applications.  Gaskets are sold individually.


Exhaust Manifold To Riser Gaskets - Indmar Riser Gasket
Your Price:
$9.99

Exhaust Manifold To Riser Gasket - BBC Indmar Riser Gasket - With Slots

620-24222

Exhaust Manifold To Riser Gaskets - BBC Indmar Riser Gasket with Slots (each)

Here is just a sampling of the popular exhaust manifold gaskets that weoffer.  Each gasket is designed to withstand the high temperatures ofmarine exhaust applications.  Gaskets are sold individually.


Exhaust Manifold To Riser Gasket - SBC Indmar Riser Gasket - With Slots
Your Price:
$7.95

Exhaust Manifold To Riser Gasket - SBC Indmar Riser Gasket - With Slots

620-24223

Exhaust Manifold To Riser Gaskets - SBC Indmar Riser Gasket with Slots (each)

Here is just a sampling of the popular exhaust manifold gaskets that we offer.  Each gasket is designed to withstand the high temperatures of marine exhaust applications.  Gaskets are sold individually.

Length: 5-5/8"
Width: 3-7/8"