How much HP do you need for a boat?

For every forty pounds of boat weight, you need one horsepower to motor along over smooth waters at 20 miles per hour. So, for a 4,000-pound boat, that’s 100 horsepower for smooth, steady cruising. For an 8,000 pound boat, that’s 200 horsepower.

How many horsepower is a 8.1 MerCruiser?


Type of Engine
Number of Cylinders 8
Horse Power 370
Configuration V-8
Weight 1130.00lbs

Is 450 hours a lot for a boat?

If you are looking at a marine gasoline-powered boat to purchase that has reached 1500 hours, this is considered a lot. Unless it has been meticulously maintained, its dependability is very questionable. Properly maintained diesel engines give boaters 5000 or more hours of dependable service.

What is the boat with the most horsepower?

Mercury’s 600 hp V-12 Verado, the world’s largest outboard, has prompted yacht builders to design new models around the engines.

How much horsepower do I need for a 20 foot boat?

Center console boats from 20′-25′ can usually perform well with a single outboard from 200 to 300-hp, depending on load and top speed expectations. Over 25′-26′, twin engines are typically recommended.

Can you exceed max hp on a boat?

The maximum horsepower capacity marked on a boat must not exceed the horsepower capacity determined by the computation method discussed in paragraph (a) of this section, or for certain qualifying boats, the performance test method discussed in paragraph (b) of this section.

What is the HP for a MerCruiser 496 Mag?

Mercury MerCruiser 496 MAG HO (425-hp) | BoatTEST.

What liter is a 496 MerCruiser?

Mercruiser 8.1L Marine Engine Specifications

Models 496 MAG HO 496 MAG
Displacement 496 cid (8.1 l)
Maximum rpm @ WOT2 4600-5000 rpm 4400-4800 rpm
Idle rpm in NEUTRAL2 650 rpm
Oil Pressure @ 2000 rpm 60 psi (414 kPa)

How much does a 450 hp Mercury outboard cost?

$54,000 to $64,000
Pricing on the new 450R ranges from $54,000 to $64,000 depending on cowlings and other rigging.

How fast does a 450 hp boat go?

74 knots
As well as a range of different propeller options, the 450R can be specified with two different gearcases. The 5.44 HD is designed for traditional submerged applications on boats with a maximum speed of 74 knots (85mph).