Sunday, May 30, 2010

Guide Of Maintaining Your Yamaha Outboard Engine Part I

Here are the most common boater screw-ups that consistently cause a fistful of trouble — money trouble. It’s too bad, really, because a little forethought and preparation can make boating trouble-free and economical.

1. Not Using a Proper Outboard 2 Stroke or 4 Stroke Oil

What It Does: Most of ordinary outboard users are using 2 Stroke/4 Stroke motorcycle oil for their engines. However, ordinary motorcycle oil does not work efficiently in outboard engine. In terms of weight, rpm, area obstacles, etc. Motorcycle is meant for land transportation with 2 passengers only.It can run above 5,500 rpm.

However, outboard engine is meant for water transportation with more than 2 passengers and runs againts the seawaves. It runs to the maximum of 5,500rpm. Hence, ordinary motorcycle oil will not maintain your outboard engine condition and performance.

Result Neglect: You may have problem with engine crank components. The engine will not perform to its maximum power. It may cost you more by using motrocycle oil

Solution: Get a Yamalube Outboard Oil from your local dealer. Indeed, You will save alot when using Yamalube Outboard 2 Stroke Oil as it 1L oil:50L gasoline mixing, comparing to motorcyle oil wich is only 1:20

Penalty: Changing the engine crank components is expensive

2. Not Changing Gear-Case Lube

What It Does: Changing gear-case lube regularly — usually every 100 hours and again for winterization — maintains optimal lubricity and also gives a heads-up on developing problems, such as leaking seals or eroding gears.

Result Of Neglect: Moisture and condensation can erode lubricity and damage gears. Worse, you might not discover leaking seals in time to save the gear case from catastrophic failure.

Solution: You can use Yamaha Outboard Gear Oil which is produced exclusive for outboard engine.

Penalty: A new gear case can cost as much as $5,000.

3. Failing to Inspect or Change Fuel/Water Separators (You do have a 10-micron fuel/water separator between your tank and engine, right?)

What It Does: Fuel/water separators remove moisture from fuel before it gets to the engine. Outboard water separators have a “sight glass” in the bottom to allow inspection for water without draining them through the petcock on the bottom.

Solution: Water vapor collects in gas and travels to the engine, where, because it isn’t compressible and combustible like fuel vapor is, it can blow rings out of the pistons or cause piston rod and/or crankshaft failure.

Penalty: You’re usually looking at a new power head or engine block. It willl cost you alot.

4. Neglecting to Change Spark Plugs

What It Does: Spark plugs ignite the fuel air mixture in the fuel when they’re clean, properly gapped and serviceable.

Result Of Neglect: Spark-plug contacts (electrodes) erode over time — especially in outboards. As the gap widens with use, the spark plug fails to ignite the fuel-air mix, resulting in fouling. Fuel economy and performance suffer first, but if a bad plug remains, sooting can destroy the engine.

Solution: Use Genuine Yamaha Spark plugs which is developed for outboard engine. Changing them requires only a socket wrench and 10 minutes

Penalty: An outboard power head can cost $6,000 to $10,000.

5. Seldom service the engine

What It Does: Servicing is very important in maintaining your engine life. Just like us, human being, need to have medical check up regularly to stay healthy

Result Of Neglect: Engine may not run when you need it, or stall in the middle of the trip. Undamaged components may get broken as the result of the damaged components.

Solution: Send your engine for servicing to your local authorized Yamaha Marine Dealer regularly. Authorized Yamaha marine dealer will examined and replace the damaged parts with Genuine parts to keep your engine long lasting.

Penalty: You know the feeling when your engine stop running in the middle of the trip, right?? As it says, it costs you more to replace the parts if it is heavy damaged rather than doing regular service.

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 thesleek Hurricane Sundeck 237 with 225 horses lunging at the mooringlines. Wait, is a 225 going to giveit the performance a family-hauling, tube-pulling funcruiser wouldget from a big V-8 inboard?

After driving it, we thought so.Plus, all that space dedicated to the inboard engine is nowdedicated to inboard fun. How would you like to add 12 square feetof party space to your deck? We thought so, too.

And quiet? We heard wind and rushingwater, 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. A motor this quiet can’t be running. It needs a warning signal forre-start dummies -- ''Hey idiot! I’m alreadyrunning!''

The beauty of the F225 comes fromits 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 valveson the back.

They had another trick up their sleeve. Each intake tube gets it own fuel injector located just before the intake valve. The result? Extremely efficient air and fuel mixture for a clean, powerful burn -- and even more compactdesign.

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 testdrive that stats can’t tell you? First, all those who said they’d never make a big block four-stroke outboard that a boat could carry were wrong. This boat sat level and true in the water. The hole-shot of tested boats showed no sign of a tail-heavy boat. Indeed all rigs were balanced. Know why? The F225 weighs nearly 300 pounds less than the nearest likely stern-drive alternative -- a 4.3L 210hp unit -- and a scant 100 pounds more than competitive two-stroke DFI 225hp outboards.

We also noticed the power in this engine was equally applied across the operating range. There were no dead spots, no wasted rpm. For each 500-rpm increase, there was a commensurate increase in torque and speed.

There is only one word to describe this engine, AWESOME!!!!


Built Tough

When the going gets tough, the smart invest in a Yamaha Enduro engine.

The Enduro 40 horsepower has been built to take the strain of hard work all day, everyday. Years of testing and refining these engines has led to a range of outboard built to go the distance no matter what you throw at them.

Engine Type2-Stroke, In-line 2
Displacement703 cc
Bore x Stroke80 x 70 mm
Recommended Max RPM5000-5500
Lubrication SystemOil injection (ETO, WHTO), Pre-mixing (MHD)
Fuel ManagementCarb
Starter SystemManual
Lighting Coil12V - 80W
Operation MethodTiller handle
Trim & Tilt MethodManual tilt
Fuel Tank Capacity24 L
Gear Ratio2.00 : 1
OEDA Emission Rating1
  • 550 mm (21.7 in)
  • 73 kg