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The safest way to determine how much horsepower you need for your boat is to know the total weight of your boat. The rule of thumb is to have 25-40 pounds of weight per 1 horsepower. If your boat weight is 800 pounds you would need a 32-20 horsepower engine.

## How much horsepower do you need for a boat?

The rule of thumb is based on weight alone, and says you should have between 40 and 25 pounds of weight for each horsepower. For example, a 5,000-pound boat could have an engine with between 125 and 200 horsepower.

## What size engine does a yacht have?

To get the right amount of horsepower needed to efficiently propel a sailboat, divide the displacement of the boat (in lb) by 550. You need approximately 1 HP per 550 lb of displacement or 4 HP per 2200 lb. Most sailboats don’t need a motor with more than 30 HP.

## How much horsepower does a 2000 pound boat have?

Speed and Fuel Efficiency

For a 2,000-pound boat to reach 20 mph, it needs 50 horsepower. This relationship between speed and horsepower has a significant impact on fuel efficiency, as well, since diesel engines run best at three-quarters throttle and gas engines prefer the 3,000 to 3,500 rpm range.

## Is 150 hp enough for a boat?

2. Aluminum Outboard-Powered Boats. … Boats in this size range with 115-hp to 150-hp engines typically have their best planing fuel economy in the 23-mph to 28-mph range with these size engines and have a WOT in the high 30s or mid-40 mph range.

## How fast is 40 hp on a boat?

A 40hp Pontoon boat with an average load of people can expect to reach speeds of around 10 – 15 mph.

## How much horsepower does a 16 foot boat need?

To achieve maximum efficiency, you’ll have to give it 50 to 300 horsepower. There’s a range of the required power as you take into consideration the size and usage. An aluminum boat that is 16 feet long needs to have a 60 horsepower motor. Once equipped, it can have a speed of 25 to 30 miles per hour.

## Where is the maximum horsepower on a boat?

According to federal law, motorized boats that are less than 20 feet in length must have a capacity plate in the steering or helm area. The capacity plate is where you can you find the maximum horsepower for your boat.

## What type of engine do yachts have?

The vast majority of yachts today are powered by diesel engines. The basic technology has been around for more than a century, but today’s diesels have evolved considerably in just the past two decades. Today’s diesel engines run cleaner, burn less fuel and produce more power per pound than ever before.

## How is hull speed calculated?

Hull Speed Formula

Theoretical displacement hull speed is calculated by the formula: velocity in knots = 1.35 x the square root of the waterline length in feet.

## How fast does a 300hp boat go?

The numbers show that the triple 300 hp engines (900 hp total) have a power-to-weight ratio of 1.68 pounds per hp, while the twin 400s (800 hp total) calculate to 1.62 pounds per hp. With the triple 300XS outboards, the boat ran a top speed of 103 mph.

## How fast can a 200 hp boat go?

You can expect speeds between 18 and 28 miles per hour for a 90 HP pontoon boat and speeds of between 37 and 45 miles per hour for a 200 horsepower pontoon boat.

## How fast will a 25 hp boat motor go?

A 25hp Pontoon boat will not be very fast, with an expected maximum speed of between 5 and 10 mph. Most commercially accessible pontoon boats tend to average between 18 and 25 mph, although there are a few very quick production boats on the marketplace, plus some altered ones that have recently set world records.

## How fast can a 100 hp boat go?

How Fast Can A 100 Hp Boat Go? 100 is a good amount of hp, able to keep the average boat at cruising speed and achieve very significant speeds from boats designed to be lightweight and fast. You can expect speeds of between 21 and 66 miles per hour, depending on the boat.

## How fast does a 90 horsepower boat motor go?

21-foot pontoon boat with a 90 HP engine could hit 25 miles per hour. 21-foot pontoon boat with a 115 HP engine could hit 28 to 30 miles per hour.

## What size motor do I need for a 20 foot boat?

Tips for selecting the right size hp for portable outboard motor for your boat.

Motor HP | Boat length (feet) | Boat length (metres) |
---|---|---|

5hp – 15hp | 8′ – 14′ | up to 4.2m |

9hp – 20hp | 11′ – 16′ | up to 4.5m |

20hp – 40hp | 13′ – 18′ | up to 5.0m |

40hp – 75hp | 14′ – 20′ | up to 5.5m |