Max Horsepower on Pontoon Boats – Newbie Info

Here are examples of the maximum horsepower on specific pontoon boats, for a reference.

  • My 22′ G3 Suncatcher V22RF has a max engine horsepower of 115 hp.
  • A 25′ 6″ Bennington 2372 RCW Windscreen Sport Arch has a max engine of 300 hp.
  • The 2015 Sun Tracker Bass Buggy 16′ DLX maxes out at a recommended 40 hp.
  • A 28′ 5″ Bennington  2575 QCW IO Sport Tower has a max engine horsepower of 430 hp.
  • The 24′ 2014 Avalon A Series Catalina DRL has a max engine horsepower of 135 hp.
  • The 25′ 4″ 2015 Regency 220 DL3 has a max engine horsepower of 250 hp.
  • The 26′ 2” 2015 Sun Tracker Fishin’ Barge 24 DLX has a max engine horsepower of 150 hp.
  • A 20′ Sweetwater SW 2080 BF has a max engine horsepower of 90 hp.
  • A 25′ Windjammer Rear J Lounge has a max engine horsepower of 135 hp.
  • An Avalon 16′ Eagle Quad Fish has a max engine horsepower of 50 hp.
  • An Avalon 14′ Eagle Quad Fish has a max engine horsepower of 40 hp.
  • A 24’ Avalon LSZ Quad Lounger has a max engine horsepower of 125 hp.
  • A 26’ Avalon LSZ Quad Lounger has a max engine horsepower of 135 hp.
  • A 27′ Suntracker Regency 254 XP3 Pontoon Boat has a max engine horsepower of 300 hp.
  • A Lowe SS210 20′ Pontoon Boat has a max engine horsepower of 115 hp.

What IS horsepower and why should I care about it?

Horsepower, hp, is a measurement of energy. One unit of horsepower is the same as the amount of energy or power needed to lift 550 lbs. 1 ft. in 1 sec. Usually this is used in regard to engines or motors. In the situation of pontoon boats, it is a measurement on the engine that helps us easily say how powerful specific engines are. The engine on a small metal fishing boat may only be 10 hp to 20 hp while a high quality speedboat may have an engine with 500 hp. Theoretically, the higher the horsepower, the easier it is for your engine to push your boat.

Why is there a horsepower limit on a pontoon boat?

All boats are different, pontoons included. Because of this, each boat has a maximum horsepower limit that cannot be safely exceeded. If you go over the allowed limit, the coast guard or police can stop you from putting your boat in the lake. They DO check! But going over the limit in horsepower may not be necessary. Most boats have a more than generous range in what the horsepower can be handled safely. If you really want more horsepower that your boat says it can handle, than you may want to consider buying a boat that can handle such a heavy duty engine.

When all boats are first made, pontoons included, and are being full scale tested, they are used with a variety of different engines starting from low horsepower engines and then they increase the engine horsepower until they find the limit that the boat cannot handle safely. They also would test to see the boat’s performance with specific engines. Then with an accurate evaluation of each engine, they would decide what hp the boat performed the best at and what it performed the safest at. With those limits set, they choose a limit to rate the boat for.

What would happen if I used an engine over the limit on my pontoon boat?

Imagine putting your car engine on your lawnmower and trying to mow your lawn. Crazy right? Not only is that extremely dangerous, but it is also unnecessary. There is no need for a lawn mower with that much power. It is the same thing with boats. Imagine if we took the 500 hp engine off the speedboat we discussed earlier and put it on the small rowboat we also mentioned. What could potentially happen to that small fishing boat? The boat could go too fast and if the engine is turned to one side, the boat may capsize. The boat could go too fast which could cause many problems. The bottom of the boat could be ruined, the rear of the boat may go too deep in the water which will make the boat flip, you could even have the engine rip right of the boat! Most of the possible scenarios I can foresee would include the person in the boat getting caught in the engine while it is going, which causes serious injury.

Your boat size and manufactured use purpose GREATLY changes what the maximum horsepower can be. For example: The 2015 Sun Tracker Bass Buggy 16′ DLX maxes out at a recommended 40 hp. This boat was tailored to suit the needs of a fisherman. There is no need for a boat like this to be speeding around the lake, you would scare the fish! Were you to exceed the maximum recommended horsepower, you are not only risking your personal safety, but you are also potentially endangering your legal situation with your boat.

I called a handful of local boat dealers and asked them what the effects of installing an engine above the limit would do to me. They all said, before anything else, that doing so would place all legal responsibility for any damages or accidents upon myself. They instantly advised me to not do anything of the sort. Anything above that limit would instantly void your boat warranty and then any damages or accidents that happen with an engine above the rated horsepower limit on your boat would not be covered. Depending on your insurance provider for your boat, you would probably also be voiding any claim to insurance on your boat were you to install an engine above manufacturers specified limits and capabilities for that specific boat model and series.

Is a bigger engine with more horsepower better?

When I bought my Suncatcher, it had a 90 hp motor at the boat store. I worked with the salesman and for $900 I got to upgrade to a 115 hp Yamaha outboard. 115 hp is the maximum horsepower that my pontoon boat is actually rated for. The speed difference in the upgrade from 90 hp to 115 hp was roughly 3 mph (4.8 kph).  While it doesn’t sound like much of a difference, I wanted to be able to have a full boat and still be able to ski or tube behind the boat. Even with a full boat and a tube being towed with people on it, I can get up to 22 mph. Having been on the tube or wakeboard myself, there isn’t really ever a need to be going any faster. At 20 mph, a hard wipe out on the wake board hurts, I don’t want to upgrade my boat speed yet. This engine is more than aptly suited to my needs.

So is a slight upgrade in the hp on your engine going to make a worthwhile difference for you? I believe that it depends on what you plan to use the boat for. If you just want a nice boat to fish out of or a boat you can lounge out all day on the lake in, you don’t need tons of horsepower. You just need to get yourself around a lake If you are towing a tube or plan on doing any water sports using the appropriate boat, it may be worth your dollar to spring up like I did.

How much horsepower do I need to do the things I want? (assuming horsepower is directly proportionate to the boat size.)

Your initial thought is probably something along the lines of “duh! The more horsepower I can get, the better!”. NOT TRUE. There is always such a thing as too much. Lets use my Toon for an example. A 22′ G3 Suncatcher V22RF. It maxes out on hp at 115 hp. The engine on it is a 115 hp Yamaha. Even loaded with 10 people I can go 22 mph to 23 mph. The optimal speed on average for water sports is 22 mph (36 kilometers). A 90 hp engine on a pontoon with a few people on it can easily hit 22 mph. For beginners at water sports, you probably don’t even want or need to go that fast. My 2 kids (4 and 6) usually don’t want to go faster than 5-10 mph. Pulling those two at 10 mph is cake and a 90 hp engine is plenty enough. However, when I have older people being towed on something, they usually need something a little bit more lively. That is why I upgraded to the 115 hp.

If I can be honest, there really isn’t much of a difference at all speed wise. The difference comes in when you look at how much weight the boat has to move. If you have a smaller hp engine, you may want to not load your boat up when doing water sports if you want to get to that 22 mph mark. Just have everyone in your group hang out on the beach and take smaller groups of 2-3 out at a time. You can still do some high speed water sports and you don’t have to spend the $1000 to upgrade to a bigger engine when you get your boat. If you have a bigger engine, then it will be a lot easier to load up your boat with 8 people and still hit the 22 mph to do water sports! (make sure you don’t put more people on your boat than your boat says it can handle.)

Disclaimer: While I do my best to have accurate measurements, specs, and information on examples for all of this site’s posts, they are not without fault. You should always do your own research in addition to any of mine.

Comments

  1. That is interesting that pontoons are full scale tested. I am glad that pontoon boat designers were able to find an engine that works great for pontoon boats in particular. I am glad to know that the size of your boat changes the horsepower it can handle.

  2. I have a 20 ft eagle playboy can I put a 115 horsepower on it

  3. It is crazy to see all of the different types of motors that are out there to choose from. On top of there being so many, its crazy to see how many people will put on their boat. I guess its assessing what you need and what will help you get the job done.

  4. i want to get a little more speed out of the pontoon.
    should i be more aware of the wot rpm . or just look for speed.
    fisher240dlx 115 merc efi.
    it has a 14x13p 18 to 20 mph seems really low.

  5. I have a 1987 Bass Buggy, right now it has a 50hp merc that is great for fishing and trolling, but we want to do some tubing and other wake boarding. I have an older 150hp merc would the pontoon boat be able to hold the motor and is it too much hp. Thanks.

  6. I recently purchased a 22 ft sun chaser with a Yamaha sho vf115 and with 4 adults 2 smaller children only 1 cooler was only able to hit 22 on smooth water I’m going to upgrade to the f150 so will be able to tube with ppl loaded .will update sfter the swap

  7. The pitch of the prop will change your speed to power ratio a lot on it’s own. For instance I have an 18′ fish and ski with 140 hp outboard…
    a 19 pitch is perfect for most everything…
    if I want to go faster, I go to a 21 or 23 pitch, it won’t hop out of the water as fast but, top speed will increase by 3-4mph/pitch change…
    If I want more power to pull skiers or tubes, I go down in pitch, 17 or a 15. There again on the top speed I lose about 3-4mph/ pitch change but, I also get the quick takeoff which is especially ideal for ski or wakeboard activities
    Hope this is helpful.

  8. I have an 88 riviera cruiser pontoon wirh 50 hp…can i put an evinrude 1978 85 hp on itm

  9. I am looking at a 24′ Grumman (24FS) that will have some repairs and a re-power following hurricane Michael. I am planning to add a third log to the vessel. Will adding the third log to the boat increase or decrease the size of the maximum motor allowed? If the maximum motor size changes, is it possible to get the boat plaquered?

  10. I have a 91 Harris float boat (pontoon) was wanting to put a115 Yamaha. Can’t find the max hp rating. It’s a 20 ft with a 40 hp.

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