what motor

[chuckwagon]

A simple question I have is do bass boats usually have a 2 or 4 stroke motor? Would this just be personal preference? And what are the pros and cons of these motor types? Thanks for the imput and opinions!

[Duffman]

You might get quicker responses and more of them if you post this question in the Bass forum. Take it straight to the guys who run those stripper glitter boats.

[Larson15]

95% of your bass boats have 2 stroke motors due to lower weight and better performance. Some of the new 4 stroke technology thats coming out is very similar now but the 2 strokes still rule the bass boat market.

[bucketmouth64]

Here is an article from game and fish magazine that talked about this. Hope this helps.

How to Decide Between a Two- or Four-Stroke Outboard Boat Engine

by Lee Boyt • July 25, 2011

When the time comes to repower Old Faithful or to spring for a new boat, what kind of outboard are you going to buy? Tough question, given the dozens of innovative choices from the various engine manufacturers.

One of the biggest decisions is whether to invest in a two-stroke or four-stroke engine. With the proliferation of misinformation regarding this subject, it’s easy to confuse fact and fiction. Not to worry. We’ll walk you through the fundamentals and add some clarity to the subject.

TWO-STROKES

In a two-stroke engine, the fuel-air mixture enters the combustion chamber via a opening in the side of the cylinder. The exhaust exits through another port in the cylinder.

Initially, two-stroke engines used carburetors to control the fuel-air mixture. But carbureted outboards aren’t particularly efficient. They also use a lot of fuel, and tend to be cantankerous creatures.

Today’s top-of-the-line two-stroke engines use a computerized Direct Fuel Injection (DFI) system to precisely regulate the fuel-air mix to suit the operating conditions. That results in amazing performance gains as well as great fuel economy and low emissions.

Typically, a two-stroke outboard is lighter than a similar-sized four-stroke engine because the two-stroke’s method of operation doesn’t require a valve train — camshafts, valves, belts or chains. Since the two-stroke isn’t encumbered with a valve train, the engine has fewer moving parts. Thus, it has less rotating mass. A two-stroke outboard can often accelerate faster than the same horsepower four-stroke.

The engine’s internal components receive lubrication from oil mixed into the fuel.

Contrary to popular belief, two-strokes aren’t a dying breed. The fact is, carbureted two-strokes are going away due to their inability to comply with increasingly stringent emissions legislation. However, the DFI two-stroke outboards are thriving and remain popular.

FOUR-STROKES

Four-stroke outboards use an engine very similar to an automobile’s. The air-fuel mixture flows into the combustion chamber through intake valves, and the exhaust leaves the engine via exhaust valves.

Because of these intake and exhaust valves (the valve train), a four-stroke outboard is usually heavier than a two-stroke outboard of the same horsepower. But, we see that changing: four-stroke manufacturers continue to pursue new ways to lighten the engines and extract more horsepower.

A four-stroke outboard’s lubrication system is like a car’s, complete with oil pan and filter — and the engine needs periodic oil changes to keep things running smooth.

The majority of four-stroke outboards feature sophisticated computer engine management systems and fuel injection for good performance across the power band, low emissions, and unparalleled fuel economy.

CHOOSE YOUR OUTBOARD

From an angler’s perspective, a boat is nothing but a means to get to where the fish are — a fishing platform — and the outboard is the driving force behind the boat. Tools of the trade, so to speak.

Taking that point of view, how do you pick the right outboard for your boat? Two-stroke or four-stroke — the broad answer is, it depends.

It depends on how you fish, where you fish, what kind of boat, and how much gear you carry with you.

If you’re a dedicated tournament angler, then you need an outboard that will pop the boat up on plane quickly and maximum top-end speed to get to the honey-holes before your competition does. In this case, a two-stroke might fill the bill nicely.

Fishing situations that require long periods of idling through no-wake zones, or pursuing bass in large impoundments where you’ll need to go several miles to find the fish, calls for an engine that’s quiet and stingy on fuel. A four-stroke could do well here.

The kind of boat also dictates the best engine. For example, every boat has a placard stating the boat’s weight capacity; a smaller boat may not be able to tolerate the additional weight of a four-stroke outboard. On the other hand, if your rig is one of the newer mega-boats — 21 feet plus, or if you fish alone and don’t take a bunch of extra stuff with you — then you can start looking at four-strokes.

A big boat or heavily loaded boat can benefit from the torque of a four-stroke outboard.

On the economic and practicality front, it’s important to consider who is going to service the engine and be there for you to take care of any potential warranty issues. The type of engine that your local dealer carries is a major consideration in choosing your new outboard.

Your local dealer will often work with you and perhaps make you a better deal at trade-in time, in addition to being available when trouble rears its ugly head.

BOTTOM LINE

Fuel economy and speed are comparable between two-strokes and four-strokes. Two-strokes tend to weigh less but can accelerate faster. Four-strokes tend to be quieter and have more torque than two-stroke outboards.

Both technologies are solid and highly evolved. Each has advantages an disadvantages.

Now you have a better idea which is the best for the transom of your fishing boat.

[BobT]

That seems like a well written and un-biased report as best I can tell.

[chuckwagon]

Thank you for the replies and the artical. Helped out a bunch! If you are an angler than is traversing large bodys of water a lot ... would a four stroke be better?

[Raider4ever]

It all depends on how much you fish. If you are on large bodies of water a lot (i.e. more than that one trip up north for week or just a few weekends a year) a 4S would probably work for you. Otherwise if you hit it for that one week at a resort or just a couple of weekends a month, overall fuel cost difference is probably less than $20.00/year. Of course, this goes out the window if you are comparing Grandpa's 1963 Johnson 25HP "Incessant Cloud of Blue Death" to a newer 2S or 4S. My example is I filled the gas tank of my 1750 FIsh Hawk with a '96 Evinrude 115hp 2S up last fall and Star Tronned it to prevent phase separation. I bass fish on a 500 acre lake with a lot of TM time. I just put five gallons of new gas in about two weeks ago which bumped the gauge up from between 1/4 and empty up to around 1/2 tank. So basically I was running $2.59/gallon gas all summer. Thus, it would take about a bajillion years for me to have fuel cost difference matter one diddly-squat.

Of course, your results may vary. Please consult a physician if your "boat ride" lasts more than 4 hours. SIde effects may include nausea, vomiting, and diarrhea.

[BobT]

This spring in May I upgraded from a 1998 Johnson 2-stoke 90hp to a 2011 Evinrude etec 90hp. I have been thoroughly impressed with the etec so far.

Fuel economy was a definite plus. I wouldn't be surprised if it goes 50% farther per gallon of fuel. This was especially noticeable on our Canada fishing trip to the Lac Seul where we put on a lot of miles per day. I also noticed that my fuel consumption was about the same as it was for my fishing buddies and their 4-strokes.

Unfortunately I've lost my mosquito fog. I no longer have to deal with exhaust smells and smoke from unspent fuel and oil. The dealership set it up for 100:1 oil ratio and coupled with the new fuel economy the blue haze and oil slick on the water are gone.

My new etec is definitely quieter than the older one. But I will say that the 4-strokes still have a distinct edge on quiet, especially at low rpm. I believe at mid-range rpm while cruising across a lake my etec is quieter though.

Talk about start-up! To put it bluntly I'd swear my etec will start just by me thinking about turning the key. I kid you not, it is that responsive.

All this with the performance of a 2-stroke.

My fishing buddies all run 4-stroke Yamaha. It was a tough call for me when I was shopping for a new outboard this past spring. Those Yamaha motors are great motors too. Virtually trouble-free, economical on fuel, quiet, and dependable.

Just my experience so far. Hope that helps.

[cribbageboy]

Strictly bass fishing... 2stroke. I don't think the 4 strokes will ever take that market.

[Sonicrunch]

Wait a minute...

2 things WRONG in that article.

1. A four stroke does NOT have more torque than a two stroke. (at least in outboards.)

2. In the case of DFI two strokes, the engines lubrication does NOT come form a oil-gasoline mix. This is important to note, because without gasoline in the crankcase, there is a lot less oil "washdown".

This means that the DFI retains it's oil in the crankcase MUCH longer. AS a result, there is much less oil usage.

Since there is much less oil usage, there are much less emissions (and smoke).