How do I choose a boat motor?

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 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

What size motor do I need for a 14 foot boat?

Typical horsepower for a 14-foot jon boat would be between 15 HP and 20 HP although up to 25 HP is not uncommon either. 20 HP can comfortably give you a top speed of 20mph, potentially even stretching to 25mph depending on weather conditions and the weight on the boat.

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How do you calculate maximum horsepower for a boat?

The federal government regulates the horsepower of outboard motors that can be installed on boats. The maximum HP is determined by calculating the boat’s factor (the length multiplied by the width) and then looking up the allowable engine size in a table.

What size boat motor do I need?

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.

How fast will a 2.5 hp outboard go?

It’s easy to handle and has convenient grab points for lifting. Yamaha F2. 5 Four-Stroke ($940; www.yamaha-motor.com) power: 2.5 hp weight: 38 pounds top speed: 5.4 mph noise at full throttle: 87 dB-A. The F2.

What size motor do I need for a 12 foot boat?

10 foot – 3 – 10 hp motor. 12 foot – 10 – 15 hp motor. 14 foot -15 hp motor. 16 foot – 15 – 20 hp motor.

What’s the best outboard motor?

Best Outboard Engines

  • Suzuki DF25. Above: Hour upon hour of testing has proven the reliability and easy starting of the DF25. …
  • Yamaha F25. You’ve gotta love where an engine like the Yamaha F25 can take you. …
  • Mercury 75/90/115. …
  • Torqeedo Deep Blue. …
  • Suzuki DF90. …
  • Yamaha V-Max SHO 115. …
  • Evinrude ETEC G2. …
  • Yamaha F250.

What size motor do I need for a 14 foot aluminum boat?

For lighter boats, a motor that produces 8-10 horsepower can get the job done quite easily. But if you’ve got a heavier boat, a 20-horsepower motor will get most any tinnie moving quickly.

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How fast will a 9.9 hp boat motor go?

Assuming 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.

What happens if motor is too big for boat?

If one were to put a larger than rated motor on the boat there would be pressure and stresses applied that may be over the acceptable range for the boat and serious damage could occur.

How fast will a 10 hp motor go?

10 HP Outboard: Speed & Runtime

Power (Watt) Speed (mph/kph) Range (mile/km)
1000 5/8 45/72
2000 6.7/10.8 30.2/48.6
3000 8/13 24/39
4000 11.5/18.5 25.9/41.7

How thick should my transom be?

Outboard transoms are pretty much standardized at 1.5″. Most use two layers of 3/4″ ply, but a stronger method is three layers of 1/2″. Transoms are typically reinforced with knees, usually a couple at the rail and two or three on the bilge stringers, to transmit torsion loads to the bottom.

How fast does a 25 HP boat 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 does a 40 hp boat motor go?

A 40hp Pontoon boat with an average load of people can expect to reach speeds of around 10 – 15 mph. A lot depends on the size of the pontoon boat, how many people are on it, and the weather conditions.

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