Vital Fluids

Dyno technician, Dave Dins, running a 1350 for DCB.
Dyno technician, Dave Dins, puts a 1350 through its paces.
OptiMax 300XS powerheads await their turn on the dyno.
OptiMax 300XS powerheads await their turn on the dyno.

We spend a lot of time validating our products. This is because we are responsible for entire propulsion systems – not just independent components. Everything (engines, transmissions, drives and propellers) must work together and be tolerant of each other. This includes oils and lubes. They are the system’s lifeblood.

We validate our engines using specific oil types and weights. Same goes for the drives and  lubes. Over the years, our two-stroke outboards have evolved from carbs to electronic fuel injection to OptiMax low-emissions direct fuel injected technology. Similarly, our higher horsepower sterndrives have evolved from traditional 2-valve, push rod engines to a quad cam, four valve engine of our own design. Oil and lube requirements have evolved along with the products. Read more

Share Share


This is the 5th in a series on design features of Mercury Racing’s  Quad Cam, four valve sterndrive engine.

The heart of our turbo compressor: hot gas expands through turbine blades, while at the other end of the shaft, compressor blades pack air into the inlet plenum.
Imagine the pulse rate in this triple 1350 powered Cigarette Marauder!

As I mentioned in The Valve Train That Could, valves exist to get air in and exhaust out. Well, the exhaust isn’t finished just because it’s past the intake valves. It’s got work to do: It’s time to “Peg the fun-o-meter” for some lucky boater! Exhaust heat remains from combustion. All turbocharged engines use that “waste” energy to spin a turbine, compressing incoming air to higher density. QC4v does that – and more.

It’s less commonly known (except by header designers and a few other social deviants), the exhaust flow also has pressure waves racing down and back up the exhaust system. When an exhaust valve opens to expel spent combustion gases, the rapid pressure rise sends a pulse down the pipe at the speed of sound. Read more

Share Share

Clean Power for the European Union

The 1100 is the most powerful EU compliant gasoline sterndrive available.
The 1100 is the most powerful EU compliant gasoline sterndrive available.
The EU compliant 565 models bring Digital Throttle & Shift technology to the European sport boat market.

The 1650 RACE was the talk of the Miami Boat Show. Equally newsworthy was our release of 565 and 1100 sterndrives certified for use in the European Union (EU). The popular engines, packed with Mercury Racing exclusive components, meet the emissions requirements as set forth in the EU Recreational Craft Directive (RCD).

The certification expands the availability of the 565, 600 SCi, 662 SCi and 1100 sterndrive engine packages to all countries that fall under the EU’s RCD. EU certified models are identified with the CE mark. OEM boat builders must certify that their boats conform to the RCD noise requirements.

Nor-Tech is going to keep busy keeping up with demand for their versatile 420 Monte Carlo.
Nor-Tech’s gorgeous 420 Monte Carlo equipped with twin 565s.
Nor-Tech's 477 Super Vee with twin 1350s.
Nor-Tech’s 477 Super Vee is a natural for EU 1100 power.

I first met go owner Andy Groeber back in 2004 when we first came out with the 1075 SCi. I would catch up with him over the following years on his annual trek to the Miami Boat Show. Andy is an exclusive Nor-Tech dealer just South of Munich. He has had a lot of success with the 662 SCis. He is excited to have the EU certified 565 and 1100. Andy sees the 565s being popular for the Nor-Tech Monte Carlo and 39-foot sportboats.

“No hassle boating is a key message for both the 565s and 1100s. The 1100s are wonderfully efficient. They have a very good reputation in the field with fewer breakdowns and less maintenance required than anything else in the past,” said Andy. They will open doors to sell high-end cats and vee-bottoms to customers who may not have bought them in the past due to maintenance needs, Andy said.  “Customers in this power range would have previously had triple diesels with sub par performance. The big power and torque capabilities of the 1100 will be a natural for big family cruisers as well,” Andy concluded. Read more

Share Share

Bravo for Go Fast Charters

Captain Sam (L) and his son Joe.
(L-R) Go Fast Fishing Charters Captains Joe and Sam Maisano.

It’s been a year since we introduced the Bravo I FS outboard propeller. It was originally developed for single engine four stroke outboard applications. We’ll, it didn’t take long for the word to spread regarding the prop’s performance. Folks running multiple four stroke outboard rigs started asking for right and left-hand rotation sets of the popular prop.

Bravo I FS test boat: 32-foot Donzi ZF center console.
Twin Verado 300s with 1.75: HD gearcases.

Being the conservative person I am, I opted to first work with a handful of people running various hull types to prove the concept before releasing the counter rotation Bravo I FS models. It took longer than I thought to get feedback from the field.

I  grew frustrated because I wasn’t getting any details regarding performance results. All I would get was, “They’re great! Thanks. ” or more often than not – no news at all. It was like pulling teeth. I found out over time the props worked so well that they wanted to keep their performance secret to themselves. Eventually, I got the detailed information I was looking for and I am happy to share it with you here. Read more

Share Share