I’m going to buy a new motor this summer for the flat bottom I am about to buy and I would like a new motor and since mercury quit making 2-strokes, i thought about a 4-stroke but am concerned about the weight because I fish a shallow river all the time. So my question is How much heavier would a 4-stroke be in a 25 hp than a 2-stroke?
Doesn’t anyone make a 25 hp 2 stroke any more?
If you have to go 4 stroke, check out the manufaturers web sites and compare weights.
You’d be surprised who has the lightest 4 stroke 25 hp motor.
I did a quick look around and I couldn’t find a 25 Hp 2 stroke motor available from Mercury, Evinrude or Johnson. They’ve all gone 4 stroke. Yamaha still offers a 25 HP 2 stroker for comparison.
Mercury 25 Hp – EFI 4 Stroke
http://www.mercurymarine.com/25_efi
Dry Weight (lbs.): 157
Yamaha 25 Hp – Carburated 2 Stroke
http://www.yamaha-motor.com/outboard/products/subcatspecs/11/specs.aspx
Dry Weight (lbs.): 106
So your answer is “about 50 lbs.” On a flat, that would seem to potentially be a consideration.
Mercury’s 25HP Foustroke weighs 157lbs. I don’t think that’s too bad. If you had a longer fuel hose and put your gas tank towards the front that may help to distribute some of the extra weight in the boat.
Good luck in your decision.
Ben Garver
Quote:
Doesn’t anyone make a 25 hp 2 stroke any more?
If you have to go 4 stroke, check out the manufaturers web sites and compare weights.
You’d be surprised who has the lightest 4 stroke 25 hp motor.
Mercury 25 Hp – EFI 4 Stroke
http://www.mercurymarine.com/25_efi
Dry Weight (lbs.): 157
Yamaha 25 Hp – 4 Stroke
http://www.yamaha-motor.com/outboard/products/subcatspecs/5/specs.aspx
Dry Weight (lbs.): 143
Johnson 25 Hp – 4 Stroke
http://www.johnson.com/docs/200008/0_US.htm
Dry Weight (lbs.): 216
Honda 25 Hp – 4 Stroke
http://www.honda-marine.com/modelDetail.aspx?modelGroup=bf25
Dry Weight (lbs.): 160
Suzuki 25 Hp – 4 Stroke
http://suzukimarine.com/sr06/df3025/features_and_specs.php
Dry Weight (lbs.): 209
Mercury, Yamaha and Honda all come in real tight when weights are compared. Yamaha is the lightest at 143 Lbs. Johnson is the heaviest at 216 Lbs.
I would stay away from the Four Strokes with Two Cylinders. They have a counter balance, dummy cylinder. I have had heard problems with them. Mercury use to make one and dropped it from there line.
This is what I love about this website. A guy asks a simple question and gets many wonderful and information packed answers! Keep up the good work!!! 
In this category find a good used two-stroke. either 20HP or 25HP. I am not a big Merc fan but a 20HP Merc two-stroke would move your Jon Boat along quite nicely. The 25 HP four-strokes are just extremely heavy.
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