The WOT rating is the RPM range the motor should achieve when running at wide open throttle. If the propeller has too much pitch, the motor will not reach its optimum RPM at WOT, while a prop with too little pitch will exceed the recommended RPM limit at WOT.
particularly, What is WOT diesel?
Wide open throttle or wide-open throttle (WOT), also called full throttle, is the fully opened state of a throttle on an engine (internal combustion engine or steam engine).
thus, Is it bad to run an outboard engine at full throttle?
Does this mean an engine should never run at wide-open throttle (WOT)? Absolutely not. Modern engines are designed to handle WOT. Also, during break-in going to WOT, as prescribed by the owner’s manual, is necessary to properly seat the pistons’ rings.
in effect Is WOT bad for your car?
It is much harder on your car to do a WOT from a standstill than it is when already going say 50mph. Of course, the amount of torque the engine has is also a factor. With our cars, I doubt much damage can be done to the drivetrain with WOT, unless you have a stick and you dump the clutch from a standstill.
What is WOT tuning?
The basic process for WOT tuning is much like part throttle tuning. The primary difference is that the target A/F ratio is usually much richer than stoichiometric. ( Nate Tovey) A safe (lower than the expected maximum) amount of ignition timing is chosen and target lambda is set to a slightly rich value.
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What is a closed throttle?
Closing the Throttle Valve reduces the fuel/air mixture and thus a smaller bag and less acceleration/speed. Fully close the Throttle Valve and you stop the flow of fuel and air and the engine stops running.
How do I know if my lower unit is bad?
Bad outboard lower units can give the operator shifting issues, and other signs will include water in the gear lube, metallic particles on the drain screw magnet, clunking sounds when shifted, or the loss of the ability to shift into gears.
How long will a four stroke outboard last?
A typical two-stroke or four-stroke outboard engine should provide 1,500 hours of run time. Based on the average use of 200 hours per year, this will last 7-8 years. However, changing your oil every 50 hours of operation and regularly flushing the engine can see your outboard engine last 10 to 20 years.
Should you cover your outboard motor?
So don’t cover the motor. If you have your boat shrink-wrapped, ask them to either work around the motor, or leave gaps around the transom so some air can get to the motor.
How bad is full throttle?
RAY: The other explanation is that, since carburetors ran so rich, the extra fuel they poured in would lead to carbon buildup on the pistons. And the thought was that by running full throttle, you could heat up the pistons and burn off some of the carbon. … In fact, it’s dangerous, and a waste of fuel.
What should air fuel ratio be at WOT?
It used to be that 12.5:1 was considered the best power ratio, but with improved combustion chambers and hotter ignition systems, the ideal now is around 12.8:1 to 13.2:1. This is roughly 13 parts of air to one part fuel.
What is a WOT shift?
WOT shifting and Power shifting are the same thing. Gas pedal down the entire time, blip the clutch in and out and shift during the clutch blip. It takes practice to do it right. Practice with the car off and practice shifting with the gas pedal down and blipping the clutch and shifting.
What air fuel ratio is best for power?
For maximum reliability at full power, air/ fuel ratios from 10.5-12.5:1 are considered best, depending on the engine. Richer than around 10.5:1, you start to get noticeable black smoke from the exhaust and the car can struggle to run properly without misfiring.
What is lambda in engine tuning?
Lambda represents the ratio of the amount of oxygen actually present in a combustion chamber compared to the amount that should have been present in order to obtain “perfect” combustion.
Does cleaning throttle body make a difference?
Cleaning the throttle body makes a difference in car performance and drivability. It is a solution to anyone experiencing rough running of the engine, unstable running of the vehicle, and decreased vehicle performance when still brand new.
How much does it cost to fix a throttle body?
To replace your car’s throttle body, you will pay as little as $370 or as much as $1,500. Labor should be between $70 and $260, and parts should cost you from $110 to $600.
Are throttle cables universal?
In today’s modern vehicles, throttle cables are obsolete with the widespread use of drive-by-wire throttle pedal assemblies. … Our universal throttle cable offerings fit most any application or engine type and mounting location.
How much does a lower unit cost?
A typical set of parts for the gearcase can cost $500-600 and may go higher if the gearcase is severely damaged. If you have your local mechanic repair the lower unit, his labor will run about $300-400 for this type of repair.
What color should my lower unit oil be?
What Color Should Lower Unit Gear Oil Be? Brand new gear oil should be a shade of blue, green, brown, or yellow, depending on the brand. Used gear oil should be a black/dark variation of the brand new color.
How much does it cost to repair a lower unit?
We checked around and found that replacing only the shaft would be close to $1,000 with labor, but other components could also be damaged. We looked at remanufactured lower units, but they cost $2,240.
What is better 2-stroke or 4 stroke?
Because 2-stroke engines are designed to run at a higher RPM, they also tend to wear out faster; a 4-stroke engine is generally more durable. That being said, 2-stroke engines are more powerful. … Two-stroke engines require pre-mixing of oil and fuel, while the 4-strokes do not.
Is 500 hrs alot for an outboard?
In the Midwest, 500 hours is “high,” even though it isn’t. I wouldn’t bat an eye buying a motor with 1,000 hrs…. but the price should reflect it’s use, because the next guy won’t pay top dollar for it either. Big 4 strokes are good for 5,000 to 6,000 hours.
Is a 4 stroke outboard better than a 2-stroke?
The fuel efficiency of a 4-stroke motor can be 50% better than that of a 2-stroke motor with the same HP. As for environmental concerns, 4 stroke outboards produce far less harmful emissions, which can be as much as 90% cleaner than those from a similar sized 2-stroke motor.
Can I leave my outboard outside in winter?
Store the Boat Outside
Outdoor boat storage is certainly possible for your boat during winter. If you decide to do this, it is especially important to pull your boat completely out of the water because ice and very cold water can do great damage to your boat.
What happens if you don’t winterize an outboard?
If You Don’t Winterize Your Boat, Here’s What Happens: Water freezes and expands and can damage anything it’s trapped inside. Water may seep into unprotected spaces to do this. … Mold and mildew take root, and you may come back to a boat in the spring that you can not use because of multiple system failures.
Do you have to winterize a 2 stroke outboard motor?
Winterizing any piece of power equipment is an important step in ensuring it is ready for the next season. Your 2-stroke outboard boat motor is not exception. It’s very easy and only takes about 20 minutes to get it ready for the off season.
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