At Marine Engines, Inc., we supply high‑performance marine engines built for power, reliability, and top‑tier performance on the water. Based in Holliston, Massachusetts and serving the entire New England area, we bring more than 30 years of experience helping boat owners, racers, and marine professionals find engines that deliver exceptional speed and durability.
Our performance marine engines are ideal for customers who want more from their boat — whether that means added horsepower for water sports, spirited cruising, or competitive racing. We focus on engines that produce responsive throttle, balanced torque, and the dependability you need for long days on the water.
We offer an extensive selection of performance engines and related components, including new marine engines, Crusader marine engines, and GM marine engines designed for high‑output applications. These engines are engineered to handle increased demands while maintaining smooth operation and longevity. If you are looking for marine engines for sale that go beyond standard applications, our performance line‑up is built to satisfy enthusiasts and professionals alike.
In addition to complete high‑performance engines, we also carry performance‑oriented parts and upgrades such as marine cylinder heads for sale, head kits for sale, and fresh water cooling systems that help optimize engine temperatures under increased load. Our team can help you select the right parts and assemblies to match your performance goals and budget.
With easy access to major highways and discounted shipping throughout the United States, our Holliston location makes pickups and deliveries straightforward and affordable. Our knowledgeable staff is ready to answer questions, guide your selection, and help you confidently upgrade to the marine performance engine that fits your needs.
Enhance your boat’s performance today — contact our team to discuss your engine options and schedule your upgrade with confidence.
Base 262 c.i. GM Marine – $2,999
| Block: Seasoned, one piece rear main seal block, Sonic tested to assure wall thickness, Max bore .040 |
| Rotating Assembly: Premium cast iron crank Micro-polished crank for superior finish Hydraulic flat tappet LUNATI camshaft Keith Black Hypereutetic pistons |
| Cylinder Heads: Cast iron Vortec |
| A Ton Of Extras: Cast iron marine intake .457 intake and exhaust lift, 218 intake and exhaust duration at .050 12 month unlimited hour warranty on pleasure craft and airboat applications Commercial or charter boat applications carry no warranty |
| Horsepower: 262 Torque: 300 |
Base 355 c.i. GM Marine – $4,095
| Block: Seasoned 4 bolt main block One piece rear main seal Max bore .040 Align honed main bearing bore Sonic tested to assure wall thickness |
| Rotating Assembly: New SCAT premium crankshaft-externally balanced Chevy heavy beam rods resized and clearance improved 150,000 PSI rod bolts Keith Black Hypereutectic pistons Hastings moly rings New COMP CAMS Hydraulic flat tappet camshaft Heavy duty double roller timing |
| Cylinder Heads: GM Vortec cast iron cylinder heads 1.25 dia. valve springs, hardened retainers and keepers 2.02 swirl polished intake valves 1.60 swirl polished exhaust valves Elgin hardened push rods Long slot rockers with positive lock adjusting nuts |
| A Ton Of Extras: New Brezinski cast iron marine intake 9.5 to 1 compression Blueprint “Signature Series” polished aluminum valve covers Rubber coated steel oil pan Brass freeze plugs All engines are dyno tested on a state of the art DTS dyno and ship with a complete spec sheet 12 month unlimited hour warranty on pleasure craft and airboat applications Commercial or charter boat applications carry no warranty |
| Horsepower: 365 Torque: 390 |
Dressed355 c.i. GM Marine – $4,995
| Block: Seasoned 4 bolt main block One piece rear main seal Max bore .040 Align honed main bearing bore Sonic tested to assure wall thickness |
| Rotating Assembly: New SCAT premium crankshaft-externally balanced Chevy heavy beam rods resized and clearance improved 150,000 PSI rod bolts Keith Black Hypereutectic pistons Hastings moly rings New COMP CAMS Hydraulic flat tappet camshaft Heavy duty double roller timing |
| Cylinder Heads: GM Vortec cast iron cylinder heads 1.25 dia. valve springs, hardened retainers and keepers 2.02 swirl polished intake valves 1.60 swirl polished exhaust valves Elgin hardened push rods Long slot rockers with positive lock adjusting nuts |
| A Ton Of Extras: New Brezinski cast iron marine intake 9.5 to 1 compression Edelbrock 110 GPH fuel pump Edelbrock stainless steel fuel line and filter Cast iron circulating pump Edelbrock 600 electric choke carburetor Professional Products harmonic balancer Blueprint “Signature Series” polished aluminum valve covers Rubber coated steel oil pan MSD Pro-billet distributor MSD Blaster SS coil AC Delco spark plugs MSD wire looms MSD Super Conductor plug wires Brass freeze plugs All engines are dyno tested on a state of the art DTS dyno and ship with a complete spec sheet 12 month unlimited hour warranty on pleasure craft and airboat applications Commercial or charter boat applications carry no warranty |
| Horsepower: 365 Torque: 390 |
Base 383 c.i. GM Marine – $4,395
| Block: Seasoned 4-bolt main Max .040 bore One piece rear main seal Sonic tested to assure wall thickness Align honed main bearing bore |
| Rotating Assembly: New SCAT premium crank Keith Black Hypereutectic pistons New COMP CAMS roller camshaft |
| Cylinder Heads: Cast Iron Vortec 1.25 dia. valve springs, hardened retainers and keepers 2.02 swirl polished intake valves 1.60 swirl polished exhaust valves Elgin hardened push rods Long slot rockers with positive lock adjusting nuts |
| A Ton Of Extras: New Brezinski cast iron marine intake .503 intake & .510 exhaust lift, 224 intake & 230 exhaust duration @ .050 Blueprint “Signature Series” polished aluminum valve covers Rubber coated steel oil pan Brass freeze plugs All engines are dyno tested on a state of the art DTS dyno and ship with a complete spec sheet 12 month unlimited hour warranty on pleasure craft and airboat applications Commercial or charter boat applications carry no warranty |
| Horsepower: 400 Torque: 435 |
Dressed 383 c.i. GM Marine – $5,795
| Block: Seasoned 4-bolt main Max .040 bore One piece rear main seal Sonic tested to assure wall thickness Align honed main bearing bore |
| Rotating Assembly: New SCAT premium crank Keith Black Hypereutectic pistons New COMP CAMS roller camshaft |
| Cylinder Heads: Cast Iron Vortec 1.25 dia. valve springs, hardened retainers and keepers 2.02 swirl polished intake valves 1.60 swirl polished exhaust valves Elgin hardened push rods Long slot rockers with positive lock adjusting nuts |
| A Ton Of Extras: New Brezinski cast iron marine intake .503 intake & .510 exhaust lift, 224 intake & 230 exhaust duration @ .050 Edelbrock Fuel Pump Edelbrock stainless steel fuel line and filter Cast iron circulating pump Edelbrock 750 electric choke carburetor Professional Products harmonic balancer MSD Pro-billet distributor MSD Blaster SS coil AC Delco spark plugs MSD wire looms MSD Super Conductor plug wires Blueprint “Signature Series” polished aluminum valve covers Rubber coated steel oil pan Brass freeze plugs All engines are dyno tested on a state of the art DTS dyno and ship with a complete spec sheet 12 month unlimited hour warranty on pleasure craft and airboat applications Commercial or charter boat applications carry no warranty |
| Horsepower: 400 Torque: 435 |
Base 496 c.i. GM Marine – $5,995
| Block: 4 Bolt Main .060 over block two piece rear seal drivers side dipstick Square and parallel decked Align honed main bearing bore Cylinders honed on computer controlled machine to within .0002 straightness and roundness Cylinders are sonic tested for thickness |
| Rotating Assembly: New SCAT cast crankshaft externally balanced New SCAT 4340 forged connecting rods 150,000 psi rod bolts Probe forged flat top Pistons Hastings moly rings Rotating assembly balanced to within 2 grams Melling high volume oil pump Flat tappet hydraulic lifter .544 intake lift, .547 exhaust lift 226 intake, 236 exhaust duration @ .050, 112 degrees lobe separation Heavy duty double roller (high performance) timing set |
| Cylinder Heads: GM cast iron oval port cylinder heads with screw-in studs and guide plates 1.509 dia. Valve springs w/ damper. Hardened retainers & keepers. 2.25 swirl polished intake valves, 1.88 swirl polished exhaust valves Elgin hardened push rods Long slot rockers with positive lock adjusting nuts |
| A Ton Of Extras: Merlin marine intake manifold 9.0 to 1 compression Chrome valve covers Milodon cad plated marine oil pan Brass freeze plugs All engines are dyno tested on state-of-the-art DTS dyno and come with a complete dyno sheet 12 month unlimited hour warranty on pleasurecraft only No warranty on commercial use |
| Critical Specs: Compression Ratio: 9.0 to 1 Ignition Timing: 13 to 16 Degree Initial / 34 Degree Total Camshaft: .544 Int / .547 Exh & 226 Int / 236 Exh duration @.050 – 112 degree lobe separation |
| Horsepower: 460 Torque: 515 |
Dressed 496 c.i. GM Marine – $7,995
| Block: 4 Bolt Main .060 over block, two piece rear seal, drivers side dipstick Square and parallel decked Align honed main bearing bore Cylinders honed on computer controlled machine to within .0002 straightness and roundness Cylinders are sonic tested for thickness |
| Rotating Assembly: New SCAT cast steel crankshaft externally balanced New SCAT 4340 forged connecting rods 150,000 psi rod bolts Probe forged flat top Pistons Hastings moly rings Rotating assembly balanced to within 2 grams Melling high volume oil pump Flat tappet hydraulic lifter .544 intake lift, .547 exhaust lift 226 intake, 236 exhaust duration @ .050, 112 degrees lobe separation Heavy duty double roller (high performance) timing set |
| Cylinder Heads: GM cast iron oval port cylinder heads with screw-in studs and guide plates 1.509 dia. Valve springs w/ damper. Hardened retainers & keepers. 2.25 swirl polished intake valves, 1.88 swirl polished exhaust valves Elgin hardened push rods Long slot rockers with positive lock adjusting nuts |
| A Ton Of Extras: World Products Merlin marine intake manifold 9.0 to 1 compression Chrome valve covers Milodon cad plated marine oil pan Brass freeze plugs All engines are dyno tested on state-of-the-art DTS dyno and come with a complete dyno sheet 12 month unlimited hour warranty on pleasurecraft only No warranty on commercial use Barry Grant marine 800 CFM carburetor Holley marine mechanical fuel pump MSD ignition system w/ plug wires and coil |
| Critical Specs: Compression Ratio: 9.0 to 1 Ignition Timing: 13 to 16 Degree Initial / 34 Degree Total Camshaft: .544 Int / .547 Exh & 226 Int / 236 Exh duration @.050 – 112 degree lobe separation |
| Horsepower: 460 Torque: 515 |
