2023 Mercury 360HP APX V8 For Sale – 4.6L – 12 in. Shaft

Model: 360 HP APX 4.6L V8
Make: Mercury
Year: 2023
Availability: In Stock
Shipping: Ready to Ship

Category: MERCURY OUTBOARDS

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Description

2023 Mercury 360HP APX V8 For Sale – 4.6L – 12 in. Shaft

ENGINE

Engine Type	V8
Bore x Stroke	3.62 x 3.39 in.(92 x 86 mm)
Displacement	4.6 L
Starting	24V Electric Start With SmartStart Protection

DIMENSIONS

Shaft Length	12 in.
Weight	430 lb.

GENERAL

Trim Method	Power Trim And Lift With Remote Pumps
Propshaft Horsepower	360 HP
Full Throttle Operating Range	7000 RPM
Gear Ratio / Shift	1.13:1
Fuel Induction	Short-Runner Intake Manifold With Forced Cold Air Induction, Electronic Fuel Injection (EFI) Computer Controlled With O2 And Pressure Feedback
Alternator	85 Amp
Cooling	Water-Cooled With Thermostat Control And Integrated Pressure Relief
Steering	Cable With Wing Plates

DESCRIPTION

The most exciting part of Mercury Racing’s latest announcement, the new competition 360 APX Competition, is not the engine itself but what it means for the future of Racing engines along with potential consumer performance engines. Mercury Racing is showing how far they can take the V8 platform and there is a strong indication that this is just the start of the APX platform but what does that mean?

For anyone other than an F1 race team, the 360 APX is something you will probably only see from a distance, which is fine, it’s purpose built for tunnel boat racing. That said, squeezing 360 HP at the prop out of the versatile 4.6L DOHC V8 is cool and intriguing.

Do we think Mercury is working on a naturally aspirated 350 HP consumer engine? Possibly. Is Racing going to add different competition engines to the new APX platform? I think so and I think it might be at least one more. A 400 ROS replacement with an applicable midsection to replace the existing 2.6 ROS is most likely, depending on that race class. And, maybe there will be an even smaller lighter engine, but if the APX platform is race specific, I’m not sure where that would fit.

What makes the 360 APX special? The key things are the weight improvement, ability to rev to 7,000 RPM, and the unique overdrive gear system. By removing parts from the 300R, adding carbon fiber everywhere, and running a 12” mid section bring the big V8 down to a respectable 430 Lbs. And another trick is the 24 volt starting system, with a low inertia flywheel for quick starts.

The unique overdrive gear system allows for optional gear ratios to spin the prop shaft much faster; made possible because of the incredible torque, allowing to match the prop shaft speed of the much higher revving 2.5L current race engines. That’s a neat trick. The SSR gearcase is updated, the midsection is very cool and built just for this application but again, this is an engine you won’t see if you don’t’ hang around the race circuit. For race teams, I suppose running normal fuel and greater engine longevity are huge cost savings in the long run.

We talked at length about the business case for the V6 platform to be more utilized, and being perfect in the 200, 225 and 250 HP class, sharing many parts with the V8 platform. I’m actually surprised they didn’t use the V6 for the the 360 APX program, because of the inherent advantages of the lower CG, and weight. The 360 V8 is an impressive achievement though and I’m sure the open exhaust on the V8 sounds incredible.

Here is the speculation and hope for Racing’s road map. Like I mentioned, a 400 ROS replacement based on the V8. Since the 300R is a popular platform, I think they might introduce a 15” mid version of the 300R but that’s speculative. A consumer V6 200, 225 and 250 R engine, also speculative but is actually a no-brainer business wise. Maybe Mercury Racing could offer carbon fiber cowls for the other engines too, that would be cool as an aftermarket item.

I rarely do news and this isn’t really another news article about the 360 APX but more of a fun look at what the APX program might be hinting at. I think we have a couple new announcements form Mercury Racing in the next six months and I can’t wait to see what’s next.

Powering Champions.

Mercury Racing is more than a name. The heat of competition warms our soul. Technology of the future excites our imagination. This passion defines the new Mercury Racing Apex Series, pure competition outboards designed to perform at the pinnacle of closed-course racing – the quickest, fastest, smartest four-stroke outboards to ever boil the water. There’s only one way to lead to the finish line. Wide Open, of course.

KEY FEATURES

Win. Wide. Open: A 4.6-liter V8 powerhead is naturally aspirated and features deep-breathing double overhead cam/four-valve architecture with a short-runner intake manifold mated to a cold-air induction system.
An 11:1 compression ratio boosts torque output while the 7000 RPM redline extends the power curve. A dynamic oil pickup system is designed to maintain critical engine oil pressure under high-G loads.
A cut-down flywheel, deleted balance shaft and carbon fiber top cowl optimize weight. A competition engine calibration is optimized to take full advantage of 360 APX powerhead tuning. While bred for racing, this four-stroke powerhead is also designed to deliver unmatched durability and reduced maintenance in a competition environment.
A digital control offers smooth and precise throttle application. The 24-volt starter produces instant dockside starting in competition. Above-water exhaust offers unrestricted flow and produces an exciting tone for racing fans.
12-Inch Midsection: The 12-inch midsection is designed specifically for Formula 1 tunnel boat applications, with a structural wet sump driveshaft housing and integrated power trim and lift with remote pumps.
SSM Gearcase: An evolved Mercury Racing Super Speed Master (IV SSM) outboard gearcase is direct-drive with no neutral or reverse shifting.
Overdrive: An overdrive spur gearset between the crankshaft and the gearcase increases the input shaft speed to the gearcase and produces the left-hand propeller rotation desired for Formula 1 circuit racing.

SPECIFICATIONS

Full Throttle RPM: 7000 RPM
Rated Hp: 360 HP
Cylinders: V8
Displacement: 4.6 L
Shaft Length: 12″
Trim System: Power Trim And Lift With Remote Pumps
Mid Section: Circuit Racing Specific 12″ Mid Section Direct Mounted With Integral Trim And Lift
Bore & Stroke: 3.62 x 3.39″ (92 x 86 mm)
Induction System: Short-Runner Intake Manifold With Forced Cold Air Induction
Fuel Requirement: Unleaded Premium 91 Octane Minimum (R+M/2) Or 98 RON 10% Ethanol Maximum
Fuel System: Electronic Fuel Injection (EFI) Computer Controlled With O2 And Pressure Feedback
Ignition System: SmartCraft PCM 112 Digital Inductive
Charging: 85 Amp
Starting: 24V Electric Start With SmartStart Protection
Oil Requirement: Mercury Racing High-Performance Synthetic SAE 10W-30
Carb Star Rating: 3-Star, EU RCD II
Steering: Cable With Wing Plates
Throttle & Shift Controls: Digital Throttle
Gearcase: IV SSM
Gear Ratio: 1.13:1
Dry Weight: 430 lbs
Idle RPM: 750 RPM
Max Trim Range: 13 deg.
Lift Range: 26 mm
Cooling System: Water-Cooled With Thermostat Control And Integrated Pressure Relief
Engine Management System: Competition Spec SmartCraft PCM 112
Engine Protection System: SmartCraft Engine Guardian With Competition Calibration
Exhaust System: Above Water
Lubrication System: Structural Wet Sump With Integrated Baffle System And Oil Cooler
Oil Capacity: 6.6 L
Steering Angle: + 30 deg. / – 30 deg.
Overdrive Ratio: 0.714 (35:25) / 0.739 (23:17)
Overall Drive Ratio: 0.809 / 0.837

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