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A cavitation plate is a permanent horizontal plate on the vertical shaft of the outboard right above the propeller. It sits just at the water level when the boat is up on plane (ie: flush with the bottom of the boat, for a planing style hull).
It prevents 'cavitation' of the propeller ie: prevents air from the surface of the water being picked up by the action of the propeller. Cavitation drastically reduces a prop's effectiveness & efficiency; basically a cavitating prop is pushing some air rather that just water. Over-revving can also result.
What else can I help you with?
What is a cavitation plate on a boat?
A cavitation plate is the adjustable metal plate that runs along the bottom of the transom on a V-drive. Some people call the flat metal plate on an outboard or outdrive a cavitation plate but the correct name is anti ventilation plate and cavitation and ventillation are not the same. It is similar in function to Trim Tabs. A cavitation plate is used to adjust the trim of a V-Drive and keep the nose on the water. Here is a link to a picture on PerformanceBoats dot com In this picture of a V-drive, the cavitation plate is anodized red.
Where should the cavitation plate be in relation to boat keel?
The cavitation plate of an outboard motor or stern drive should generally be aligned with or slightly above the bottom of the boat's keel. This positioning helps optimize performance by reducing drag and improving the propeller's efficiency. If the cavitation plate is too low, it can lead to inefficient handling and increased fuel consumption; if too high, it can cause ventilation issues and loss of thrust. Proper alignment can vary based on boat design and intended use, so adjustments may be necessary for specific conditions.
What year is your 7.5 mercury outboard if the numbers on the motor plate are 7076233?
my serial number for a 7.5 mercury outboard is 7076233. What year is it?
What is a transom plate?
A transom plate is a horizontal structural member that reinforces the transom, which is the part of a boat's stern where the outboard motor is mounted. It helps distribute the load of the motor and provides additional strength to support the weight and vibrations of the motor.
What additional information appears on the capacity plate of a powerboat that has an outboard motor?
maximum horsepower rating
What additional information appears on the capacity plate of a power boat that has an outboard motor?
Usually will list max HP motor for that boat.
How do you know how high to place an outboard engine?
On the lower leg of the motor, just where the gearcase bolts on, you will notice the anti-ventilation plate. Just above this plate, (the "plate" resembles a flat, horizontal fin), many motors have a second plate. You'll want to hang the engine where the bottom of the boat falls between these two plates. You can go a little lower than this, but not where the boat bottom falls below the bottom plate. This will likely cause cavitation and or engine overheat.
Your Yamaha outboard has identification plate with 15a 651 S13354 you need to know what year model your motor is?
Yes thanks and my motor is a yamaha yes
Trying to identify Johnson outboard motor Model number plate is gone but you got serial number from freeze plug Serial number is j2556640?
Johnson outboard motor Serial Number J2575938 Question What Year is this Motor and is it possible to get the Model Number
Where is drain plug on 70 hp evinrude boat motor?
The drain plug on a 70 hp Evinrude outboard motor is typically located on the lower unit, near the cavitation plate. It's often a brass or plastic screw that can be removed to drain the gear oil. Make sure to check your owner's manual for the exact location and any specific procedures for your model. Additionally, ensure the motor is in a vertical position to allow proper drainage.
How low in the water does an outboard motor go?
it depends on your hull, your lower trim plate should ideally be in line with the line of the keel of your boat.
Is Outboard a word?
Yes. For example, you can have an outboard motor on a boat.
