LS Engine Parts and Accessories

How-To-LS Swap a Marine application

Like many people, you have already come to recognize the dominance of the LS engine platform from all types of motorsports and powersports.

So imagine you were doing the same engine swap into a car, sand rail, air boat or virtually anything for that matter. What's more important than knowing what the engine needs is knowing what the boat needs from the engine to make it a compatible fit.

The first thing to ask yourself or the installer what does the car, boat or anything need or require to accept a new LS Based engine or retrofit. A marine application is no different what the engine needs is based entirely on what the engine is mating to. Below are a list of the most common questions to ponder before you start your project.

  1. What is the exact application and or drive type you're adapting to? Jet? Bravo? Alpha? #6 Sterndrive? V-Drive? Wakeboard boat configuration?
  2. What does the current engine have on it for accessories that the new engine will need? Will you want just a sea water cooling pump and will you fabricate your own accessories mounting and or drive ? Or do you want a complete kit?
  3. Is the engine Aluminum or Iron block? Are you going to want closed cooling?
  4. What style of motor mounts does your current engine use that you will have to adapt to?
  5. If you're adapting to a sterndrive application and you have an Alpha Outdrive you will need a modern Bravo bellhousing and LS Flywheel and coupler.
  6. Does your LS engine have a long or short crankshaft snout? This is critical in indentifying starters, flywheels, PTO, etc.
  7. Where does your current exhaust exit and can the new LS exhaust adapt to your current exit location? Will you want aluminum exhaust or Stainless steel headers?
  8. Does your engine use a carburetor or EFI? If EFI how many O2 sensors will you be using? one or two?

We have tried to address all of these but due to so many variables there is no such thing as a kit. There is no way to make one size shoe fit everyone basically. But we are here to support you through the journey. We've also partnered with Powerboat 1 to develop a technical advice video series on converting an LS Engine for use in a jet application. Check out the video series here!

Happy Boating!
GM LS Series, Rear Sump Swap Oil Pan
Your Price:
$405.99

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

GM LS Series, Rear Sump Swap Oil Pan

740-20145

GM LS Series, Rear Sump Swap Oil Pan

Wet Sump, 5 Quart Capacity, 5'5" Deep, 8.5" Wide, 8.375" Long
Engine Application: GM LS Series
Fits: LS Engine Conversions that require a Rear Sump
1/2"-20 drain plug

  • Oil pan has a thick precision laser cut steel rail with a durable fabricated steel sump plated with a clear zinc finish
  • Fabricated, durable steel construction is more adaptable to add fittings, change finishes and weighs les than cast aluminum construction.
  • Clears 4.25" stroke with most steel rods
  • Front of the oil pan is 1.813" Deep to the beginning of the 5.5" deep sump.
  • The fabricated steel sump is 5.5" Deep, 8.5" Wide, and 8.375" Long
  • Removable anti-slosh baffle
  • Features a billet aluminum adapter that allows a 13/16" thread Moroso or OEM oil filter to be mounted in the stock location, no need to run a remote oil filter.
  • Designed to be used with Moroso 740-24050 Oil Pump Pickup
  • Magnetic drain plug and uses a stock dipstick

GM LS Series Remote Oil Filter Adapter
Your Price:
$119.99

GM LS Series Remote Oil Filter Adapter

740-23688

GM LS Series Remote Oil Filter Adapter

  • Replaces Moroso Spin-On oil filter adapter on Moroso #'s 20142, 20143 & 20151 oil pans, comes standard on Moroso # 20146 oil pan.
  • Ideal when chasis restrictions don't allow the use of block mounted filter or when a larger external filter is desires.
  • Billet aluminum construction
  • -10 AN "In" and "Out" ports
  • Includes mounting hardware and engine block sealing O-Rings

GM LS Series Remote Oil Filter Adapter
Your Price:
$99.99

GM LS Series Remote Oil Filter Adapter - 90 Degree

240-22-632

GM LS Series Remote Oil Filter Adapter - 90 Degree

This billet aluminum adapter is designed to install under the pan rail of  LS1 pans and provide inlet and outlet ports for installing lines to a remote oil filter. Adapter features o-ring seals between the pan and the adapter and 1-1/16" -12 AN oil inlet and outlet ports.

  • 1/2 NPT Inlet and Outlet 
  • Ports are set at 90 Degrees
  • Lightweight Billet Design

Hardin Billet Aluminum Flywheel - Internal Balance for GM LS1-LS7 (Bottom Mount Starter)
Your Price:
$419.99

Hardin Billet Aluminum Flywheel - Internal Balance for GM LS1-LS7 (Bottom Mount Starter)

755-8644

Hardin Billet Aluminum Flywheel Internal Balance for GM (LS1-LS7)

Ring Gear Tooth Quantity:168-tooth, Rear Main Seal Style:1-piece, Flywheel Material:Aluminum

These precision billet aluminum flywheels deliver all of the strength and reliability that you desire with the light weight and advantages that only aluminum can provide. Lightweight Aluminum alloy flywheels can offer substantial benefits for certain situations such as light weight boats or racing boats that need rapid engine rpms instantaneously. These are recommended as replacements for factory-cast flywheels in high performance and racing applications. They're better for acceleration of heavier race boats. All Hardin flywheels are CNC-machined from certified materials.

  • Accepts Mercury couplers and heavy duty drive plates
  • Multi-point ring gear attachment
  • Light weight yet durable
  • Zero/neutral balance • 168 tooth gear
  • Bottom Mount Starter Flywheel
  • Weight: 12 lbs

Hardin Steel Flywheel - Internal Balance for GM LS1-LS7 (Bottom Mount Starter)
Your Price:
$419.99

Hardin Steel Flywheel - Internal Balance for GM LS1-LS7 (Bottom Mount Starter)

755-8643

Hardin Steel Flywheel Internal Balance GM (LS1-LS7)

Ring Gear Tooth Quantity:168-tooth, Rear Main Seal Style:1-piece, Flywheel Material:Steel

These precision steel flywheels deliver all of the strength and reliability that you need in a performance application) Cast flywheels are porous units designed for low rpm truck and industrial applications) Steel provides a shatter free strength that could mean the difference between ripping your boat in half under way. These neutrally balanced units drilled to accept popular Mercruiser high Performance couplers.

  • Accepts Mercury couplers and heavy duty drive plates
  • Multi-point ring gear attachment
  • Zero/neutral balance • 168 tooth gear
  • Bottom Mount Starter Flywheel
  • Weight: 28 Lbs

Power Take Off Adapter - LS1 Chevy 1310 Flexplate
Your Price:
$129.99

Power Take Off Adapter - LS Chevy 1310 Flexplate

500-2000

Power Take Off Adapter - LS Chevy 1310 Flexplate

Uses 3/8-24 bolts on 2" x 2-3/8" centers

These flanges bolt on the flexplate and accept 1310 spicer drivelines.  There are many more available, just call us. These power take offs are needed when attaching your drive shaft to your engine.

Need help choosing your new PTO flange? Check out this handy tutorial!


Power Take Off Adapter - LS1 Chevy 1310 Flywheel
Your Price:
$129.99

Power Take Off Adapter - LS Chevy 1310 Flywheel

500-2005

Power Take Off Adapter - LS Chevy 1310 Flywheel

Uses 3/8-24 bolts on 2" x 2-3/8" centers

These flanges bolt on the flywheel and accept 1310 spicer drivelines.  There are many more available, just call us. These power take offs are needed when attaching your drive shaft to your engine.

Need help choosing your new PTO flange? Check out this handy tutorial!


Power Take Off Adapter - LS Chevy 1350 Flexplate
Your Price:
$129.99

Power Take Off Adapter - LS Chevy 1350 Flexplate

500-2010

Power Take Off Adapter - LS Chevy 1350 Flexplate

Uses 7/16-20 bolts on 2-3/8" x 2-7/8" centers

These flanges bolt on the flywheel or flexplate and accept 1350 spicer drivelines.  There are many more available, just call us. These power take offs are needed when attaching your drive shaft to your engine.

Need help choosing your new PTO flange? Check out this handy tutorial!


Power Take Off Adapter - LS Chevy 1350 Flywheel
Your Price:
$129.99

Power Take Off Adapter - LS Chevy 1350 Flywheel

500-2015

Power Take Off Adapter - LS Chevy 1350 Flywheel

Uses 7/16-20 bolts on 2-3/8" x 2-7/8" centers

These flanges bolt on the flywheel or flexplate and accept 1350 spicer drivelines.  There are many more available, just call us. These power take offs are needed when attaching your drive shaft to your engine.

Need help choosing your new PTO flange? Check out this handy tutorial!


LS1 14mm PTO 1310 Adapter Bolt Kit
Your Price:
$79.99

LS PTO 1310 Adapter Bolt Kit

500-2156

LS PTO 1310 Adapter Bolt Kit

This is a special metric bolt kit for 1310 LS PTO's.

Contains (6) M11x1.5x31 Bolts and (4) 3/8"-24 x 1" bolts


LS1 PTO 1350 Adapter Bolt kit
Your Price:
$79.99

LS PTO 1350 Adapter Bolt kit

500-2158

LS PTO 1350 Adapter Bolt kit

Contains (6) M11x1.5x31 Bolts and (4) 7/16"x1" bolts


Head Studs w/12-Point Nuts, SB Chevy LS1, LS6 5.7L/6.0L, 2004 Engines
Your Price:
$368.99

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

Head Studs w/12-Point Nuts, SB Chevy LS1, LS6 5.7L/6.0L, 2004 Engines

860-234-4317

Head Studs w/12-Point Nuts, SB Chevy LS1, LS6 5.7L/6.0L, 2004 Engines

Exact Tolerances for Perfect Alignment
Exact tolerances ensure that gaskets and cylinder heads just glide into position and align perfectly. Head Studs include hex nuts and are manufactured by from premium 8740 chrome moly steel and heat treated to 190,000 psi. They are thread rolled after the heat treating process, which vastly improves their fatigue tolerance compared to studs threaded before heat treatment. High-quality, parallel ground washers included.


Head Studs w/12-Point Nuts, SB ChevyLS1, LS6 5.7L/6.0L
Your Price:
$415.99

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

Head Studs w/12-Point Nuts, SB ChevyLS1, LS6 5.7L/6.0L

860-234-4316

Head Studs w/12-Point Nuts, SB ChevyLS1, LS6 5.7L/6.0L

Exact Tolerances for Perfect Alignment
Exact tolerances ensure that gaskets and cylinder heads just glide into position and align perfectly. Head Studs include hex nuts and are manufactured by from premium 8740 chrome moly steel and heat treated to 190,000 psi. They are thread rolled after the heat treating process, which vastly improves their fatigue tolerance compared to studs threaded before heat treatment. High-quality, parallel ground washers included.


Hi-Performance Head Bolt Kit, SBC Gen III/LS Series (2003 & Earlier)
Your Price:
$212.99

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

Hi-Performance Head Bolt Kit, SBC Gen III/LS Series (2003 & Earlier)

860-134-3609

Hi-Performance Head Bolt Kit, SBC Gen III/LS Series (2003 & Earlier) Hex Head

HIGH PERFORMANCE SERIES
High Performance head bolts are available with a reduced wrenching hex and wide area flanged head that eliminates the need for valve train removal to facilitate cylinder head re-torquing. All High Performance Series bolts are 170,000 psi (which is 15% stronger than Grade 8) and kits come complete with hardened parallel-ground washers.


Hi-Performance Head Bolt Kit, SBC Gen III/LS Series (2004 & Earlier)
Your Price:
$136.99

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

Hi-Performance Head Bolt Kit, SBC Gen III/LS Series (2004 & Earlier)

860-134-3610

Hi-Performance Head Bolt Kit, SBC Gen III/LS Series (2004 & Earlier) w/All Same Length Bolts

HIGH PERFORMANCE SERIES
High Performance head bolts are available with a reduced wrenching hex and wide area flanged head that eliminates the need for valve train removal to facilitate cylinder head re-torquing. All High Performance Series bolts are 170,000 psi (which is 15% stronger than Grade 8) and kits come complete with hardened parallel-ground washers.


SB Chevy LS1 pro-series hex head stud kit
Your Price:
$381.99

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

SB Chevy LS1 pro-series hex head stud kit

860-234-4110

SB Chevy LS1 pro-series hex head stud kit

Head Studs with Hex Nuts, SB Chevy LS1, LS6 5.7L/6.0L

Exact tolerances ensure that gaskets and cylinder heads just glide into position and align perfectly. ARP Head Studs include hex nuts and are manufactured by ARP from premium 8740 chrome moly steel and heat treated to 190,000 psi. They are thread rolled after the heat treating process, which vastly improves their fatigue tolerance compared to studs threaded before heat treatment. High-quality, parallel ground washers included.


LS1, LS6 5.7L & 6.0L balancer bolt kit
Your Price:
$36.99

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

LS1, LS6 5.7L & 6.0L balancer bolt kit

860-234-2503

LS1, LS6 5.7L & 6.0L balancer bolt kit

  • M16 x 2.0 Thread
  • 4.325" UHL
  • 1-1/16" Socket

To ensure the damper is locked into place, use these ultra-strong 200,000 psi bolts that exert maximum clamping force. Special features include 1/4" thick washers with an extra wide surface and tall 12-point heads that accept a deep socket to end the worry of stripping the head.


SB Chevy LS1 hi-perf Cracked Rod
Your Price:
$110.99

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

SB Chevy LS1 hi-perf Cracked Rod

860-134-6006

SB Chevy LS1 hi-perf Cracked Rod

These are undeniably the strongest, most reliable OEM-replacement rod bolts available! Forged from 8740 chrome moly, you are guaranteed maximum durability, especially when combined with 's innovative manufacturing technology. Choose from new Wave-Loc or standard knurled design. 190,000 psi.


Gauge Install Kit for LS Engines
Your Price:
$46.99

Gauge Install Kit for LS Engines

865-5284

AutoMeter's GM LS engine gauge installation kits feature specialized components to ease the installation of an LS engine into your boat. Includes a full color installation guide that not only details the use of the included metric adapter fittings, short depth temperature sensor, and tachometer resistor, but also covers installation procedures for other commonly monitored parameters.

 Each kit includes:

  • 12mm x 1.5 to 1/8 in. NPT adapter 
  • 16mm x 1.5 to 1/8 in. NPT adapter 
  • Low profile electric temperature sender
  • 10K 1/2 watt resistor (tach function)

LS Plug & Play Harness with Tach Adapter
Your Price:
$205.99

LS Plug & Play Harness with Tach Adapter

865-9123

LS Plug & Play Harness with Tach Adapter

This Plug and Play solution lets you quickly and easily install the 105-9117 Tach Adapter onto your LS-derived engine.

    Features:
  • Does not alter factory wiring
  • Plugs into factory ignition coil connectors
  • Sealed connector plug