How Do Boat Motors Work?

How do outboard boat engines work?

The cylinders have sliding pistons that push a crank around and the crank drives a shaft that (eventually) powers the wheels. Much the same happens in an outboard motor. To steer a boat with an outboard motor, you simply tilt the whole motor casing so the propeller pushes the water away from it at an angle.

Are boat engines hard to work on?

The typical gasoline marine engine will run fine for the first 1,000 hours. The reason is that marine engines normally work harder and under worse conditions than automobile engines. A well-maintained gasoline engine run under the best conditions may well run for more than the 1,500 hours without major overhaul.

Do boat motors need water running?

Note: Never start an outboard motor without a water supply—it must either be in the water or connected to a hose providing water. Water lubricates the vanes of the rubber water pump impeller, and running the motor without a water supply for even a few seconds can damage or destroy the impeller.

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Why do boats have 2 motors?

Two motors can improve the way the boat maneuvers, it can also increase the reliability of your boat. If one motor is down you are not stuck out on the water. Having two motors on a boat can also give you more power.

How much water should be coming out of outboard?

Re: how much water The thermostat will not open till the motor reaches around 140+degs. and water should come out the pee hole then as the stats open up. There should be an exhust/water port on the midsection back side that should have water spiting out of them at idle and till the stats open up.

Which is better 2 or 4 stroke outboard?

From a cost perspective, a 4-stroke outboard is far more fuel efficient 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. They’re quieter than 2-strokes, with the lower pitch of the motor being less of a nuisance.

Why do boat motors not last long?

First, diesel engines typically last longer than gasoline engines. There are two main reasons for this. One, at a given boat speed they turn fewer revolutions, usually about a third fewer. When an engine turns fewer revs per mile, pistons make fewer trips up and down the cylinders and valves open and close less often.

Is 1200 hours a lot for a boat?

1200 years on a boat is a lot, and at the same time not because a boat at that age could be in good condition because the owner could have probably serviced it annually; otherwise, it couldn’t last that long. But 1200 in less than 6 years implies the boat is perhaps overused, which isn’t always good.

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How long do boat motors last?

The average marine gasoline engine runs for 1,500 hours before needing a major overhaul. The average marine diesel engine will run for more than three times that long and log an average 5,000 hours under the same conditions.

How long can you run boat motor without water?

How Long Can You Run A Boat Motor Without Water? You are not supposed to run your boat motor without water, but if for some reason you must, between 2 and 10 seconds is the max time.

Can you run a 2 stroke outboard motor without a thermostat?

Can I Run My Outboard Without The Thermostat? Yes, you can temporarily run your outboard without the thermostat and not harm the engine. No, you can not remove the thermostat and continue running the engine for long periods of time without causing harm to the engine.

Can you run a trolling motor out of water?

Can You Run a Trolling Motor Out of Water? The short answer is, yes. The motor will run just as well out of water as if it were submerged. However, there’s no reason to run a trolling motor out of the water.

Why do boats have so many motors?

Compared with all three other propulsion systems that basically have an engine in the boat, using multiple outboards makes the boat faster because of a beneficial power-to-weight ratio and, in most cases, the outboards are more fuel-efficient.

Why are there 3 outboards?

Going from three to four outboards on the same boat usually increases speed, but not proportionately to the increase in horsepower. Even though you boost the power by a third, the weight and drag of the fourth outboard prevents a corresponding increase in velocity.

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Is it better to have one outboard or two?

All things being equal, including horsepower and weight of the hull, a single outboard should come out ahead when it comes to speed, because a single gear case and propeller create less drag in the water than two. In addition, the weight of two smaller outboards usually exceeds the weight of one large motor.

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