Asked by: Janene Izuriaga
home and garden home appliances

How far outboard should water be?

Last Updated: 18th April, 2020

45
A boat rigger's rule of thumb is that the motor can be raised one inch for each eight to 10 inches of distance between the transom and prop. As the prop moves further aft, it's also likely to be in cleaner, “harder” water, and be more efficient.

Click to see full answer.

Regarding this, how deep should an outboard be in the water?

A boat rigger's rule of thumb is that the motor can be raised one inch for each eight to 10 inches of distance between the transom and prop. As the prop moves further aft, it's also likely to be in cleaner, “harder” water, and be more efficient.

Furthermore, should water come out exhaust outboard? It's normal for cooling water to also exit through the exhaust. It's part of the cooling system (in addition to the pee stream). And when you aren't moving, the exhaust might bubble out from the lower unit because it also exits out through the prop while underway.

Keeping this in consideration, where should water come out on an outboard motor?

Water is drawn into the water pump through the intake opening of the lower unit, where it passes through a cavity that ends up entering the pump itself. At that point, the impeller pressures the water into the long inlet tube leading to the bottom side of the powerhead.

How long can you run an outboard out of water?

Run the engine for 10 minutes, or according to the manual's instructions. If you're flushing the motor, most manufacturers recommend running it for 5 to 10 minutes. If you're running the engine for another purpose, such as to test its function, run it for as long as your maintenance task requires.

Related Question Answers

Abdenabi Guliev

Professional

How high should my outboard be mounted?

For a propeller to best satisfy particular boating needs, the engine must be attached to the transom at the correct height. Over the past 30 years, industry standards for transom height have been developed: 15" for "short shaft" engines, 20" for "long shaft" engines, and 25" for "extra-long shaft" engines.

Inderjit Bodnar

Professional

How far below the bottom of the boat should the prop be?

If you have a short shaft motor, the top most part of the transom and the lower most part of the boat should be about 15 to 16 inches. For a long shaft, I think 20 to 21 inches is correct.

Sihame Dobrotvortsev

Explainer

How do you know if your outboard is too low?

You can often tell that an outboard is too low if you are experiencing sluggish speeds, poor handling, excessive spray, porpoising, or even water pushing up into the cowling. That's a very brief, basic accounting of symptoms, but you'll usually find at least one of these symptoms if your motor is too low.

Gaetan Virini

Pundit

What is a cavitation plate?

Cavitation plates are mounted to the lower units of boats to help increase performance. They act as a planing surface to get your boat on top faster. They give you better bow response when trimming your motor. They keep water down at your prop and intake improving water pressure.

Chengcheng Roblas

Pundit

Do all outboards have a pee hole?

Outboard Motor Isn't Peeing. Most outboard motors are equipped with a cooling system using outside water. Outside water is circulated through cooling passages before leaving through the motor's “pee hole”. You've seen it!

Nicu Vaipan

Pundit

Should water coming out of outboard be hot?

Increasing engine RPMs to a fast idle and higher should produce a strong stream of water exiting the outboard. The water coming out of the tell-tale is usually warm. If it's hot, that's often an indication of a blockage somewhere in the cooling system (and the flow probably won't be as strong as it should, either).

Liman Chamoso

Teacher

How do you know if your outboard is overheating?

If it has a telltale, and there's water coming out, it ain't getting hot. If you stick your finger under the telltale water it should be warm, but not hot. If the motor has a thermostat, it will probably run a little hotter.

Yunaisy Wittorf

Teacher

How long does an outboard impeller last?

Impellers will last a loooooooong time if they dont ingest sand. They will last seconds if they do. I have run some for as long as (cough) 25 years before replacing (small lake boat) .

Xinbo Egbers

Teacher

Arturo Armoa

Teacher

What happens when Outboard overheats?

The most common cause of outboard motor overheating is water pump failure. Lack of raw water flow and lack of fresh water can cause water pump failure. Generally, if it is not a problem with lack of raw water flow or fresh water, the heat exchanger will be the cause.

Arline Inman

Reviewer

Why does my outboard motor not pump water?

The water pump impeller is the cause of most water circulation and overheating problems. The impeller is essentially a small, round disc with spinning blades used to move water through the circuit of the outboard motor. When the impeller is broken, it stops the supply of water to the engine and results in overheating.

Abderraman Talvik

Reviewer

Why does water come out the side of a boat?

Water comes out of the side of the hull from what is termed an “overboard discharge”. The main seawater pumps in the engineroom draw water from the sea inductions placed in the bottom of the ship, pass it through heat exchangers for generators, air con, main engine, refrigeration and other services.

Kimberly Schmaltz

Reviewer

Is it bad to run an outboard without water?

You can run an outboard for a very short time out of water, but the impeller is running dry and will shred very rapidly.

Eimi Martin

Supporter

Why do impellers fail?

Impeller pumps generally fail in one of two ways. The first is a gradual degradation in pump performance and flow. This is usually due to impeller or housing wear or impeller age. The second failure mode is sudden, catastrophic failure, with the impeller usually loosing some or all of its blades.

Reka Roeber

Supporter

How often should you flush your outboard?

Twice a year whether it needs it or not. Been doing it that way for 30 years. If we look at it from practical mechanics then yes, flushing routinely with fresh water can go a long way towards preserving an outboard motor.

Wenceslao Estaras

Supporter

What happens when impeller goes bad?

If your impeller fails, the pump can't pump cool water to the engine causing your engine to overheat. If you catch that your impeller is failing early on, you might avoid major problems. However, if you're not fortunate enough to catch a bad impeller, the results can be catastrophic to your engine.

Elzbieta Rengel

Beginner

Does an outboard motor need to be winterized?

If your engine has a fogging oil fitting, you do not need to remove the air box cover. Four-stroke outboards have a plastic air intake that you spray the fogging oil into. Fuel stabilizer in a size to treat your fuel tanks.