Why are boat engines so inefficient?

Your boat is inefficient because you are trying to exceed “hull speed” and the power needed to get the boat up on step and keep it there is enormous.

Why are American engines so inefficient?

1. American pushrod engines generally have lower redlines than overhead cam engines. Horsepower is proportional to torque multiplied by rpm, so if you can rev your engine higher and still maintain torque, you can produce more power. The limiting factor to how fast an engine can rev is usually the valvetrain.

Why are boat engines so unreliable?

Many boat engines are “unreliable” because they are not taken care of correctly. While some boat engines are less reliable than others, there are common engine issues that appear from overuse, ill-maintenance, or low-quality materials.

Why do boat motors not last long?

Boat motors typically last at least 2,000-3,000 hours before they need serious maintenance. Inboard motors will sometimes last longer because they are more protected from wear and tear.

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Why do boats get bad gas mileage?

The main reason why boats will always burn more gas than cars is they run on water. Aerodynamics, wind resistance, waves, and drag affect the fuel consumption of a boat. Basically, a boat needs to use more fuel to cover the same distance a car will cover.

Why are American car engines so big?

1: Big Engine + Low Compression = Happy Reliability.

Typically with smaller engines, higher compression is needed to make more power. Even when you add on turbos and other forced induction goodies the car will still be running a higher stress level than an engine with the same power but bigger displacement.

Why do v8s rev so low?

Because redline is mostly to do with the piston speeds within the engine, smaller, lighters, cylinders with short strokes (distance the piston travels up and down) will have higher redlines. But these big V8s have large strokes and large bores, meaning the pistons speed reaches its limit at a lower rpm.

How long do boat engines 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.

Is buying a boat a waste of money?

Boats are a good investment if you don’t overshoot your budget. If you research your options and go for a vessel that you can afford, nothing trumps the joy of spending time on the water. However, a boat can definitely also be a bad investment. A rule of thumb is to only buy a boat you can afford to pay for in cash.

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Are 2 stroke engines reliable?

With differences in speed, maintenance, and consistency of the two-stroke, it is a more reliable dirt bike than a four-stroke. Overall, each bike has its pros and cons, but two-strokes are quicker, easier to repair parts, and is also incredibly light.

Is 1000 hours on a boat a lot?

The typical gasoline marine engine will run fine for the first 1,000 hours. It is at this juncture that the engine starts to exhibit small problems. If these small problems aren’t addressed, they can turn into major problems which may make the last 500 hours of life difficult to reach.

Is 1100 hours on a boat a lot?

A land automobile averages about 30 miles per hour overall, so 1100 hours would take it about 33,000 miles. A boat gets nowhere the same gas mileage and burns about 3 times the fuel per hour given the same size engine.

How often should you run boat engine?

A few hours every week keeps the motor in better shape than using it two or three full days every month. The more often it gets used, the better it will run, just like any vehicle.

Should a boat be stored with a full tank of gas?

Filling the Tank

Marine engine manufacturers and technicians advise storing any boat with the fuel tank almost full, leaving just a little capacity to accommodate expansion of the fuel if the temperature warms. … This can occur if the boat is stored outdoors or in an unheated building.

How far can a boat go on a tank of gas?

To get nmpg, divide boat speed in knots by gph. So, if the throttled-back boat above travels at 17 knots, it would get about 1.4 nmpg. At this speed and with a 120-gallon fuel tank, the range would be 151 nautical miles.

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How much is boat insurance a month?

The general rule of thumb when it comes to calculating average boat insurance prices is that you’ll pay about 1.5% of the value of your boat in annual rates. To insure a boat worth around $20,000, it would cost you only about $300 per year to have it fully insured.

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