93evinrude
Petty Officer 2nd Class
- Joined
- Sep 9, 2002
- Messages
- 154
Re: Power of 2 Stroke v 4 Stroke?
There are so many variables that determine the performance of a 2 stroke vs 4 that the results can reverse themselves from from boat to boat and motor to motor and the needs of the owner would also effect the best choice.ie for slow speed and trolling,I believe most would be best fitted with a 4 stroke while a high performance bass boat a 2 stroke.That's today,tomorrow could be different.....<br /><br />I subscribe to a great magazine(bass & walleye boats) that does many tech articles,boat comparisons,manufacturer comparisons and in this case a comparison of motors and here is an example that you may find interesting:<br /><br />May 2002 issue<br />boat -skeeter zx2200 bay boat<br />Motors yam 200 hpdi and yam 200 4 stroke<br /><br />results<br />top speed 47.1 for the 2 stroke vs 46.8<br />0 to 30 6.6 sec. for 2 stroke vs 7.2<br />fuel at optimum cruise speed<br /> 4.0 mpg for 4 stroke at 30.7 mph<br /> vs<br /> 4.3 mpg at 30.3 mph for 2 stroke<br />surprise; in this case on a tank of fuel at optimum cruise speed the 2 stroke had a range of 232 miles vs the 4 stroke at 216 miles.<br /><br />in addition<br />-at 1000 rpm the 4 stroke had a distinct advantage <br />-from 3000 to 3500 rpm the 2 stroke had the distinct advantage<br />-at wide open there was a slight advantage for the 4 stroke with a range of 146 vs 135 miles<br /><br />As some have mentioned already,this topic could go on forever with all the variables involved.This is just an single example on a particular boat and I'm sure the results would vary using a different boat or horsepower or manufacturer,etc.......<br /><br />Thank you to B&W Boats for their great articles.
There are so many variables that determine the performance of a 2 stroke vs 4 that the results can reverse themselves from from boat to boat and motor to motor and the needs of the owner would also effect the best choice.ie for slow speed and trolling,I believe most would be best fitted with a 4 stroke while a high performance bass boat a 2 stroke.That's today,tomorrow could be different.....<br /><br />I subscribe to a great magazine(bass & walleye boats) that does many tech articles,boat comparisons,manufacturer comparisons and in this case a comparison of motors and here is an example that you may find interesting:<br /><br />May 2002 issue<br />boat -skeeter zx2200 bay boat<br />Motors yam 200 hpdi and yam 200 4 stroke<br /><br />results<br />top speed 47.1 for the 2 stroke vs 46.8<br />0 to 30 6.6 sec. for 2 stroke vs 7.2<br />fuel at optimum cruise speed<br /> 4.0 mpg for 4 stroke at 30.7 mph<br /> vs<br /> 4.3 mpg at 30.3 mph for 2 stroke<br />surprise; in this case on a tank of fuel at optimum cruise speed the 2 stroke had a range of 232 miles vs the 4 stroke at 216 miles.<br /><br />in addition<br />-at 1000 rpm the 4 stroke had a distinct advantage <br />-from 3000 to 3500 rpm the 2 stroke had the distinct advantage<br />-at wide open there was a slight advantage for the 4 stroke with a range of 146 vs 135 miles<br /><br />As some have mentioned already,this topic could go on forever with all the variables involved.This is just an single example on a particular boat and I'm sure the results would vary using a different boat or horsepower or manufacturer,etc.......<br /><br />Thank you to B&W Boats for their great articles.