The rule of thumb guidelines based on weight alone would be between 40 and 25 pounds of weight per 1 hp. In other words a 5,000 lb boat fully loaded could have a 125 to 200 hp engine. The wide range, based on weight alone, is due to the variety in design and handling characteristics of a given boat.
What happens if you put to big of a motor on a boat?
It used to be true that if you went with a higher horsepower motor you were also adding weight to the transom that could affect the balance of the boat. … Going from a single motor to multiples also creates potential weight issues along with other issues so check with the manufacture.
What is the biggest motor you can put on a 12 foot boat?
For example, a twelve-foot boat with a four-foot transom width translates into a maximum engine size of fifteen horsepower.
How big of a motor can you put on a 10ft jon boat?
10′ Jon Boat
Depending on how heavy the users are, 10-foot jon boats can comfortably carry two people and some light equipment. Generally speaking, a 3 HP motor is the more desirable engine for these jon boats although some models can take up to 5 HP.
Can you exceed the recommended HP on a boat?
(i) The boat must be rigged with equipment recommended or provided by the boat and motor manufacturer and tested with the highest horsepower production powerplant for which the boat is to be rated, not to exceed 40 horsepower. … Boats without permanent tanks must be tested with one full portable tank.
Can I put a bigger motor on my boat than it’s rated for?
Can I use a bigger motor on my boat than what it’s rated for? It is not a violation of Coast Guard regulations to install or use an engine larger than specified on the capacity label, but there may be state regulations prohibiting it, and restrictions from your own insurance company regarding this.
How fast does a 10 hp boat motor go?
View Full Version : 10 H.p. = 1.5 M.p.h.
How much HP does my boat need?
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. And so on.
What is the biggest motor you can put on a 14ft jon boat?
14 foot Jon Boats average a maximum horsepower of 15-20hp but some will fall outside of that range based on the specific boat.
How fast will a 5hp outboard go?
The 5hp engine will put you in the 10mph range, while the 7.50-10hp engines will push you 15+ mph.
How fast will a 9.9 mercury 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. In my experience with similar craft and outboards, this sounds very reasonable.
How fast will a 135 hp boat go?
With a 135 HO etec that boat will run 45-47 mph with the right prop.
How fast does a 7.5 hp outboard go?
Thread: 7.5hp top speed
hp motor mounted on a Starcraft 12 foot V-bottom boat will only go 7 mph at the most downstream. 5 mph upstream.
How fast will a 150 hp bass boat go?
A single 115 to 150-hp engine can produce a reasonable performance for an entry-level fiberglass sportboat from 17′-19′, depending on the load. With it, a powerboat in this range can have a top speed from 40 to 45 mph, with cruising speeds in the mid-20s.