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Old 17 March 2011, 13:59   #1
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two stoke or four

Oh dear, more questions!!! What do you experts think Two or Four. Could you explain the pros and cons of each? cheers Phil
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Old 17 March 2011, 14:15   #2
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I'm not an expert by any means, but here's some advantages for each type:

Two stroke:
Lighter
Cheaper to buy used
Mechanically simpler
Cheaper to service

Four stroke:
Cheaper to run
Lower emissions (some lakes prohibit two-strokes)
No need for premix/injection oil
Greater choice of new models
Quieter

I'm sure I'm missing other points that others will add.
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Old 17 March 2011, 14:30   #3
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Quote:
Originally Posted by Delta 15 View Post
I'm not an expert by any means, but here's some advantages for each type:

Two stroke:
Lighter
Cheaper to buy used
Mechanically simpler
Cheaper to service

Four stroke:
Cheaper to run
Lower emissions (some lakes prohibit two-strokes)
No need for premix/injection oil
Greater choice of new models
Quieter

I'm sure I'm missing other points that others will add.
Thank you!
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Old 17 March 2011, 14:39   #4
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Quote:
Originally Posted by Delta 15 View Post
I'm not an expert by any means, but here's some advantages for each type:

Two stroke:
Lighter
Cheaper to buy used
Mechanically simpler
Cheaper to service

Four stroke:
Cheaper to run
Lower emissions (some lakes prohibit two-strokes)
No need for premix/injection oil
Greater choice of new models
Quieter

I'm sure I'm missing other points that others will add.
Umm the 2 stroke detail is way off for modern 'strokers DFI engines are VERY economical, low on emissions and little difference in weight although generally lighter.
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Old 17 March 2011, 14:55   #5
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Quote:
Originally Posted by ashbypower View Post
Umm the 2 stroke detail is way off for modern 'strokers DFI engines are VERY economical, low on emissions and little difference in weight although generally lighter.
Sorry, I was thinking about older smokers, like mine
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Old 17 March 2011, 18:43   #6
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I have owned both 2 stroke and 4 stroke engines. I prefer 2 stroke. Fuel economy for 4 stroke is about double the 2 stroke, BUT you will have other issues such as old fuel left in the tank, water in fuel, etc. etc. If you think carefully, then it may be easier and cheaper having a 2 stroke! sadly now I have a 4 stroke!

In addition to what other have said:

2 Stroke:
You CAN and WILL enjoy doing DIY jobs on it

4 Stroke
Need to take it to main dealer, especially with new engines having ECU (like car engines need diagnosis computer)
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Old 17 March 2011, 19:13   #7
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A point and two quotes:

Do a search, this topic has been discussed many times.

Listen to the immortal words of Mr. Vanstone:
Quote:
My supplier put it this way (he sold both, so was getting the sale either way) 'The Suzy will give you a Jag, the Etec a Ferrari
And also those of Mr. Nocera:
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A British RIB is like a sportscar. It is the most nimble thing on the water. Why would you strap lead weights to its rear end?
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Old 17 March 2011, 19:23   #8
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What I don't understand is......why if the E-tec 2-stroke is so good , do other manufacturers manage to sell 4-strokes,and why does no-one else manufacture / market modern 2-strokes?

I'm not having a pop at the e-tec, I genuinely just don't understand why there is only 1 producer of this type of engine if it is so good
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Old 17 March 2011, 19:58   #9
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Quote:
Originally Posted by lakelandterrier View Post
why does no-one else manufacture / market modern 2-strokes?
Mercury/Tohatsu/Yamaha?
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Old 18 March 2011, 02:34   #10
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Originally Posted by Vandad View Post
4 Stroke
Need to take it to main dealer, especially with new engines having ECU (like car engines need diagnosis computer)
Perhaps if something goes wrong with the ECU. My Yam 115 has not missed a beat in 6 years/500 hrs. Nearly all maintenance is well within the reach of a home mechanic.

jky
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