New boat 6.2 question

[badluck24/7]

Probably not worthy of a new thread but couldn't find anything close.
Looking around online and seeing 6.2 liter base engines on some new boats. Is this an LS engine or just a SBC?

 

[NicPaus]

It replaced the 454 in early 2000 and had 320hp. Never heard anything bad about them good fuel mileage.

 

[Gelcoater]

Probably not worthy of a new thread but couldn't find anything close.
Looking around online and seeing 6.2 liter base engines on some new boats. Is this an LS engine or just a SBC?

I thought Merc was making them in house,so not an SBC and not an LS either.

 

[Runs2rch]

I thought Merc was making them in house,so not an SBC and not an LS either.

Exactly. All in house like the 4.5.

 

[River Runnin]

My boat will have the 6.2L VVT DI (L86) plant.

SPECS

• Displacement: 6162cc (376 ci)
• Engine Orientation: Longitudinal
• Compression ratio: 11.5:1
• Valve configuration: overhead valves
• Valves per cylinder: 2
• Assembly site: Tonawanda and St. Catherines
• Valve lifters: hydraulic roller
• Firing order: 1-8-7-2-6-5-4-3
• Bore x stroke: 103.25 x 92mm
• Fuel system: DI
• Fuel type: Premium recommended
• Max. Engine Speed: 6000 rpm
• Engine Mass: 717 lbs. (325 kg)
• Emissions controls:
  • Three-way exhaust catalyst
  • Pre and post catalyst O2 sensors for each bank (four total)
  • Returnless fuel system
  • Positive crankcase ventilation
• Peak Horsepower (hp):
  • Kodiak Marine?420hp @ 5600 RPM
• Applications (Torque: lb-ft (Nm)):
  • Kodiak Marine?460 lb-ft. @ 4100 RPM
• Materials:
  • Block: Cast Aluminum
  • Cylinder head: Cast Aluminum
  • Intake manifold: Composite
  • Exhaust manifold: Cast Aluminum with closed cooling
  • Main bearing caps: Cast Nodular

Every millimeter of the combustion system was carefully designed to support the most ideal combination of direct injection, active fuel management and variable valve timing, making the most of power, torque and efficiency.

Direct injection technology moves the point where fuel feeds into an engine closer to the point where it ignites, enabling greater combustion efficiency. It fosters a more complete burn of the fuel in the air-fuel mixture, and it operates at a lower temperature than conventional port injection. That allows the mixture to be leaner, so less fuel is required to produce the equivalent horsepower of a conventional, port injection fuel system. Direct Injection and cylinder head design allow increased compression ratio. The 11.0:1 compression ratio has a greater thermal efficiency than previous engines. Higher thermal efficiency like direct injection means better brake specific fuel consumption.
Kodiak GEN V engines utilize the new MEFI 7 ECM. MEFI 7 is the latest in the line of robust electronic engine management from GM.

 

[BHC Vic]

Premium recommended for the 6.2? I think 8.2 calls for regular. Or I've been using the wrong gas [emoji4]

 

[LargeOrangeFont]

Premium recommended for the 6.2? I think 8.2 calls for regular. Or I've been using the wrong gas [emoji4]

87 octane minimum on both the 300HP and the 350HP versions of the Mercuriser 6.2.

On the old SBC based 6.2, 87 octane was the minimum as well.

 

[LargeOrangeFont]

It replaced the 454 in early 2000 and had 320hp. Never heard anything bad about them good fuel mileage.

That is the SBC based older 6.2. I have one in my boat, I'm pretty happy with it. Fuel mileage is awesome.

 

[BDMar]

The Mercruiser 6.2 is based on the SBC. It is a very good engine.

HP / kW 350 / 261
Maximum RPM (WOT) 5000 - 5400
Engine type V8, 2-valve/cylinder pushrod
Displacement (L) 6.2
Displacement (CID/L) 377 / 6.2
Bore and stroke 4.0" x 3.75" / 101.6mm x 95.25mm
Recommended fuel Unleaded Regular 87 Octane Minimum (R+M/2) or 90 RON 10% Ethanol Maximum
Fuel ethanol tolerance Up to 10%
Fuel requirement 90 RON 10% Ethanol Maximum Unleaded Regular 87 Octane Minimum (R+M/2)
Engine control system Mechanical Shifting with Optional SmartCraft DTS
Standard SmartCraft with Electronic Throttle Controluel delivery system
Computer controlled Multi-Port Electronic Fuel Injection (MPI)
Air induction Performance-Tuned Scroll Intake Manifold
Ignition SmartCraft PCM 112 Digital Inductive
Alternator amp / Watt 70 amp / 882 watt (Belt-Driven)
Water drain system Air Actuated "Season Extender" (Bravo)
Exhaust system Through prop
Cooling system Fresh water cooled available with SeaCore option
Water-cooled with thermostat
Lubrication system Integrated wet sump
Recommended oil NMMA Certified FCW 25W-40 Synthetic Blend
Engine guardian system SmartCraft Engine Guardian
Dimensions (L x W x H) 32 x 30 x 22" / 813 x 762 x 559 mm
Weight (engine only) 862 lbs / 391 kg

 

[OCMerrill]

An all aluminum variant of the SBC, foundered and assembled in house on a Mercruiser spec assembly line at a converted ex GM engine assembly plant is what I read.

The V6 uses an Iron block.

The V8's have some pretty high compression that you can get away with using aluminum and 91 octane.

 

[LargeOrangeFont]

An all aluminum variant of the SBC, foundered and assembled in house on a Mercruiser spec assembly line at a converted ex GM engine assembly plant is what I read.

The V6 uses an Iron block.

The V8's have some pretty high compression that you can get away with using aluminum and 91 octane.

Still scratching my head as to why they didn't go with an LS variant like Volvo Penta has done.

 

[OCMerrill]

Still scratching my head as to why they didn't go with an LS variant like Volvo Penta has done.

Tied to GM IMO. If GM says no more then Mercury is screwed and Mercury bought all the 496's and SBC's they could, right to the end. Maybe the LS deal was a problem because of Volvo? Outside the US Volvo has a big market share. All speculation and noting is in print as to why.

Making their own - this has been talked about for many years and the "Big Boy series" 1050 and 1350 has proven they indeed can make super reliable V8's. The 502 is based off a GM performance situation and a production contract. When that's done expect something in-house to replace that. Then all gas engines will be their own.

Their Diesels are all over the map though buying engines from Cummins, VW, and others but with the new 4.2L V8 from Cummins made just for Mercruiser I think VW will be out sooner than later. Yes that's a de-stroked Nissan 5.0 Cummins.

 

[BDMar]

An all aluminum variant of the SBC, foundered and assembled in house on a Mercruiser spec assembly line at a converted ex GM engine assembly plant is what I read.

The V6 uses an Iron block.

The V8's have some pretty high compression that you can get away with using aluminum and 91 octane.

The Mercruiser 6.2 is a cast iron block based on the SBC. The 6.2 aluminum block engines with higher compression ratios are LS engines and not Mercruiser.

 

[OCMerrill]

The Mercruiser 6.2 is a cast iron block based on the SBC. The 6.2 aluminum block engines with higher compression ratios are LS engines and not Mercruiser.

Then the article I read is wrong then.

http://www.boatingmag.com/mercury-mercruiser-62l-300-350-ect

So Mercruiser is using LS engines? I cant find anything that give any info there.

I suffer from sleeping issues so reading all this stupid shit is what I do. LOL.

 

[BDMar]

Then the article I read is wrong then.

http://www.boatingmag.com/mercury-mercruiser-62l-300-350-ect

So Mercruiser is using LS engines? I cant find anything that give any info there.

I suffer from sleeping issues so reading all this stupid shit is what I do. LOL.

I see how after reading that article it could be confusing. I would be questioning it also, if I didn't have a 6.2 in here and worked on them before. I can assure you the block is cast iron.

No, Mercruiser does not have an LS engine in it's line up (yet). Mercury has long resisted aluminum blocks due to corrosion. The majority of their product is salt or brackish water and they are constantly fighting and improving anti corrosion.

Below mentions all the components materials used in their complete package. Cast iron for the block, composites for the closed cooling fittings, etc.

a saltwater-resistant system was developed starting with a combination of cast iron, composites and marine alloys for use wherever the engine encounters raw water

Below describes how they protect aluminum such as the Bravo Drive water pickup.

SeaCore is a hard coating that penetrates and alters the internal aluminum cooling passages

 

[Flying_Lavey]

I see how after reading that article it could be confusing. I would be questioning it also, if I didn't have a 6.2 in here and worked on them before. I can assure you the block is cast iron.

No, Mercruiser does not have an LS engine in it's line up (yet). Mercury has long resisted aluminum blocks due to corrosion. The majority of their product is salt or brackish water and they are constantly fighting and improving anti corrosion.

Below mentions all the components materials used in their complete package. Cast iron for the block, composites for the closed cooling fittings, etc.

a saltwater-resistant system was developed starting with a combination of cast iron, composites and marine alloys for use wherever the engine encounters raw water

Below describes how they protect aluminum such as the Bravo Drive water pickup.

SeaCore is a hard coating that penetrates and alters the internal aluminum cooling passages

Why not use the LQ blocks then? Cast iron block, aluminum head very similar geometry....

 

[Gelcoater]

Making their own - this has been talked about for many years and the "Big Boy series" 1050 and 1350 has proven they indeed can make super reliable V8's. The 502 is based off a GM performance situation and a production contract. When that's done expect something in-house to replace that. Then all gas engines will be their own.

.

A little birdy might have shown me a pic today of pretty much this.
Rumor has it a 7.0 liter QC4v style engine, normally aspirated, 700+hp and 7k+ rpm.

I would guess the 600sc and 700sc engines will be discontinued here shortly.

 

[Cole Trickle]

A little birdy might have shown me a pic today of pretty much this.
Rumor has it a 7.0 liter QC4v style engine, normally aspirated, 700+hp and 7k+ rpm.

I would guess the 600sc and 700sc engines will be discontinued here shortly.

I thought it's being released as a car motor?

 

[Gelcoater]

I thought it's being released as a car motor?

The engine in the pic I saw was blue.

 

[LargeOrangeFont]

The engine in the pic I saw was blue.

Simple to marinize and drop it in a boat. That thing wont fit in many cars anyway