Mercury Racing sits at the high-performance end of the Mercury family: stronger midsections, racing gearcases and sterndrive packages built for boats that actually use the power. This guide is for buyers comparing the models we carry — what each one is for, which OEM facts you can lean on, and what you should confirm with us before you order.
We stick to published Mercury Racing / Mercury Marine specs here. Shaft length, color, included rigging and exact weight for your package still need a quick check against the unit on hand.
Outboards vs sterndrives vs drives
Three different things show up in a Racing catalogue:
- Outboards — complete engines that hang on the transom (for example the Mercury Racing 450R). Power, gearcase and midsection are one package.
- Sterndrive engines — the inboard powerplant that pairs with a drive unit (for example the 565 or the 1100 Anniversary).
- Drives — the lower unit / transmission that turns engine torque into thrust (for example Bravo One XR, M6, M8). You match drive capacity to the engine, not the other way around.
If you are repowering, start with boat type, hull speed goals and whether you already have a compatible drive or gearcase. That short conversation saves more money than picking horsepower first.
Mercury Racing 450R outboard
The 450R is Mercury Racing’s 450 hp supercharged V8 outboard (4.6 L, 64° V8 with 32-valve DOHC). Full-throttle RPM is published around 5,800–6,400. Alternator output on dealer/OEM sheets is 115 amp. Standard Racing gearcases for this family (5.44 HD and Sport Master) are listed at a 1.60:1 gear ratio — not the older 1.92:1 figure you may still see on some third-party pages.
Dry weight depends on shaft length and gearcase. Published dealer tables put common packages roughly in the high-600s to low-700s lb range; we do not publish a single weight on the product page until the shaft and gearcase on the unit you are buying are confirmed. Phantom Black and Cold Fusion White are the usual color options on OEM sheets.
Ask us for: shaft (L / XL / XXL), gearcase, whether a rear tie-bar or Joystick Piloting hardware is included, and what the listed price covers for rigging.
565 sterndrive engine
The 565 is a naturally aspirated V8 sterndrive engine at 565 hp (8.7 L / 533 cid). OEM WOT is 5,000–5,400 RPM. Gear ratios commonly listed with Bravo One XR packages are 1.35:1 and 1.50:1. Published dry / package weight on OEM materials is 1,201 lb / 545 kg. Alternator rating on the current OEM page is 90 amp.
This is a strong match for performance boats that want Racing sterndrive power without stepping into the turbo / QC4v territory of the 1100 class. Confirm drive choice (Bravo One XR variants are the usual partners) and recreational warranty language with us before you buy.
Bravo One XR drive
The Bravo One XR is the drive, not the engine. OEM materials position it with high-horsepower sterndrive packages (engines up to about 600 hp class, boats in the ~85 mph conversation). Gear ratios you will see with Racing packages include 1.35:1 and 1.50:1.
When you shop this page, ignore any leftover marketing that only talks about a 565 — the product is the XR drive. Pairing engines on OEM sheets for this family include the 565 and 600 SCi (and related Racing sterndrives). Tell us which engine and boat you have so we can confirm compatibility before you order.
M6 and M8 Racing drives
These are Mercury Racing’s dry-sump drive / transmission family for very high horsepower sterndrive boats:
- M6 — OEM max power capacity 1,100 hp (input torque rating 1,600 ft-lb on the OEM page). Gear ratios listed: 1.69:1, 1.53:1, 1.40:1, 1.30:1. Left and right rotation available.
- M8 — OEM max power capacity 1,650 hp with the same 1,600 ft-lb input torque rating and the same gear-ratio set. Use M8 when the engine package needs the higher capacity.
Do not size these by “bigger is always better.” Match the drive’s capacity rating to the engine you actually run. We can help confirm rotation, ratio and whether your application needs M6 or M8.
1100 Anniversary sterndrive
The 1100 Special Anniversary Edition is a 1,100 hp QC4v-family V8 sterndrive (9.0 L / 552 CID). Bore × stroke on OEM sheets is 4.57 × 4.21 in (116 × 107 mm); alternator 105 amp. Current OEM 1100 pages list WOT around 6,000–6,500 RPM — confirm the exact band for the anniversary SKU with us.
Weights and warranty on anniversary editions can differ from the current standard 1100 sheet, so we treat those as confirm-before-quote items rather than copying a single number from a generic page. Drive partners on OEM 1100 materials include the M6 / M8 family.
Models we mention but do not stock as product pages yet
Mercury Racing also publishes the 400R (naturally aspirated V10, 400 hp), 500R (supercharged V8, 500 hp) and 600 SCi sterndrive (600 hp at the transom). We do not list those as sellable product pages until supply is confirmed. If you need one for a build, send an RFQ and we will check availability.
How to choose without guessing
- Decide propulsion: outboard vs sterndrive (engine + drive).
- Match horsepower and RPM range to the boat’s design speed and weight — not to a brochure photo.
- For outboards, lock shaft length and gearcase before you care about color.
- For sterndrives, lock engine + drive + gear ratio together; a mismatched drive is an expensive mistake.
- Ask what the price includes (rigging, controls, propeller, commissioning).
Browse our wider Mercury engines and sterndrive categories if you are also comparing non-Racing MerCruiser or Mercury options. For propulsion trade-offs in general, see our sterndrive vs inboard vs outboard guide.
Quick FAQ
Is the 450R an inline-four?
No. OEM and dealer sheets describe a 64° V8 with 32-valve DOHC. Ignore any listing that still says “inline 4.”
Why don’t you list one dry weight for the 450R?
Because shaft length and gearcase change the number. We would rather confirm the unit on hand than publish a weight that does not match what you receive.
M6 or M8 — which do I need?
Use the OEM capacity rating: M6 up to 1,100 hp, M8 up to 1,650 hp. Tell us your engine horsepower and we will confirm.
Can you source a 400R or 500R?
Ask. Those are real OEM models; we only publish a product page when we can fulfill it.
Ready to talk through a Racing package?
Send the boat make/model/length, current power (if any), target speed or use case, and whether you already have a drive or gearcase. We will answer with what we can supply and what still needs confirming — no invented specs.
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