# Question: How Fast Can A 4 Hp Engine Go?

## How fast does a 140 hp boat go?

ConclusionOptimal Cruise Speed:39.1km/h (21 knots)Cruise Range (Approx) Based on 95% Fuel Capacity:659kmMaximum Speed:7km/h0-40km/h:6.5sec.

## How fast does a 70 hp motor go?

around 33 mphyou would need to run a 13X17 pitch on that 70 which would top out around 33 mph @WOT 5600 RPM.

## How fast is a 2hp motor?

45 to 50 mphRe: top speed 2hp Should get 45 to 50 mph in 3to5 chop at .

## How many pounds of thrust does a 2.5 hp outboard motor have?

55 lbsThe rule of thumb I go by is 1 HP = About 22 lbs of thrust. So it’s about 55 lbs of thrust for 2.5 HP.

## 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.

## How fast will a 6 hp outboard go?

Mercury 2015 6 HP max speed = 16,25 MPH – 26 Km/h -14,4 knots.

## How fast can a 250 hp boat go?

When equipped with 250-hp or 300-hp outboards, these types of aluminum fishing boats can typically have a WOT of 55 mph to 60 mph, or a bit more with two people aboard.

## How fast is a 3 hp outboard motor?

To give you a simple reference, a 3 hp electric outboard can push a 12 ft boat with 150 kg (331 lbs) load at a max speed of 9 km/h (5.6 mph). That’s to say the 3 hp outboard motor can provide more than sufficient propulsion for a 10 ft tender or work as an auxiliary power for a daysailer of up to 1.5 tonnes (3307 lbs).

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

But you don’t have to put engines that large and expensive on a 16′ to 24′ aluminum fishing boat. 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 many horsepower is 55 lbs of thrust?

1/3 hpIf you’re getting the full 55 lbf of thrust at this speed, then your hull has 55 lbf total resistance at this speed. 55 lbf = 0.245 kN, so (0.245 kN)*(1 m/s) = 0.245 kNm/s = 0.245 kW. That’s about 1/3 hp.

## How fast will a 5 hp outboard motor go?

This boat length will usually allow for a 5hp engine, with some models permitting up to 10hp engines. The 5hp engine will put you in the 10mph range, while the 7.50-10hp engines will push you 15+ mph.

## How fast can a 2.5 hp outboard go?

5.4 mphHere are our results. Tohatsu 2.5 Two-Stroke (\$630; www.tohatsu.com) power: 2.5 hp weight: 26 pounds top speed: 5.4 mph noise at full throttle: 84 dB-A.

## How fast is 15 hp outboard?

Me and just the boat it will hit 32 mph on glass days. 2 guys and gear takes it down to about 20 to 22 mph.

## How fast is 150 horsepower in mph?

50 to 60 miles per hour150cc typically have a maximum speed of 50 to 60 miles per hour. Calculate the horsepower by multiplying or dividing by 15.

## How much fuel does a 70 hp outboard use?

A general rule of thumb for outboard fuel consumption to 10% of rated horsepower per hour at WOT. So 10% of 70HP is 7 gallons per hour at WOT.

## What is the lightest 70 hp outboard motor?

LIGHTEST WEIGHT IN CLASS Yamaha’s new F70 is not only the lightest four stroke 70 horsepower outboard, it’s even lighter than competitive two stroke direct-injected outboards.

## How fast can a 10 hp outboard go?

As a practical matter , you can get from fifty to maybe eighty mph with a ten hp engine on a light weight motorcycle if you tuck in and have a good fairing .

## How fast can a 100 hp boat go?

But here it is… 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.

## How fast will a 75 hp outboard go?

Most outboards have a preferred powerband where they run at optimum efficiency and minimal fuel burn. Yep, that 75 hp might be able to push the boat to 32 mph, but that’s with the throttle jammed against the stops.

## How fast will a 9.9 hp outboard go?

around 20 mphAssuming this is a light 14′ utility boat and a standard 9.9, Mercury would recommend a 8.5 to 9.5 pitch prop for the OP’s application and predicts a top speed around 20 mph. In my experience with similar craft and outboards, this sounds very reasonable.

## How fast does a 50 HP boat go?

Change your prop(you will see a little increase) or max the hp(you will see more increase). It beats the heck out of rowing either way. I have a 16 foot boat with 50 hp 4 stroke Merc, and it tops out at about 30-35 mph depending on how much weight is in the boat.