The Yamaha F225 four-stroke was a treat to drive on every application we tested -- there were twin engine offshore boats, bayboats, walleye boats and more. But our guys were captivated by the sleek Hurricane Sundeck 237 with 225 horses lunging at the mooring lines.

This boat had a stern drive last time we took it for a spin, a 5.7L bruiser if memory serves. So, is a 225 going to give it the performance a family-hauling, tube-pulling fun cruiser would get from a big V-8 inboard? After driving it, we thought so.

Plus, all that space dedicated to the inboard engine is now dedicated to inboard fun. How would you like to add 12 square feet of party space to your deck? We thought so, too. We heard wind and rushing water, little else. At idle, a peek at the tach was required to see if the engine was running. At the dock, we confess, somebody tried to restart an already running engine -- three times. The Settlers 4 Gold Edition.

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A motor this quiet can’t be running. It needs a warning signal for re-start dummies -- 'Hey idiot! I’m already running!' ' Now, don’t read any more if you don’t care to know why it’s so fast, quiet and efficient.

But for those of you who do The beauty of the F225 comes from its elegant design. Yamaha engineers didn’t exactly break the rules in an exercise of civil disobedience.

They occupied new territory. To trim down its size they made it a 60-degree V-6 block.

But the big deal in both size and power was the clever way they fed air and fuel to this double-overhead cam engine. On auto engines, the air intake is on the center of the V, taking up a huge (huge by outboard standards) amount of space.Yamaha put the air intakes on the outside, sweeping the air supply through intake silencers forward on the engine to the intake valves on the back. They had another trick up their sleeve. Each intake tube gets it own fuel injector located just before the intake valve. Wood And Metal Ak47 Airsoft. Extremely efficient air and fuel mixture for a clean, powerful burn -- and even more compact design. Industrial Dynamics Jay Forrester Pdf Merge on this page. To crown this unique achievement,the exhaust was taken from the center of the cylinder banks, in the V -- exactly the opposite of your automobile’s four-stroke engine -- and swept efficiently down and out through the propeller. So, what did we find in our test drive that stats can’t tell you?