better choice 2 stroke or 4 stroke?

Discussion in 'Outboards' started by Phildave, Jan 7, 2009.

  1. Easy Rider
    Joined: Oct 2009
    Posts: 920
    Likes: 46, Points: 0, Legacy Rep: 732
    Location: NW Washington State USA

    Easy Rider Senior Member

    mwatts,
    I was using my 60hp Suzuki (w 4.8 quarts cap) as an example .. sorry. As for changing oil only once a season .. OK for .. not for me. Carbon collects in the oil of a gasoline engine as it's being run and is an excellent abrasive (much more so w a diesel) and the molecules get beat up badly so as to make them shorter thereby reducing their ability to keep metal away from metal. Corrosive elements form and "eat" metal. No thanks. After spending $6000 for my Suzuki I'm going to give it every chance I can. After break-in my E-tech is supposed to go to the dealer to get adjusted to 100-1. Mine will stay at 50-1. mwatts, I'm not on a bandwagon .. I think the 4 strokes over 29hp are wonderful . but I lead towards 2 strokes. And one can only criticize 4 strokes for their weight to a certian extent as they have largely been a replacement for IOs and I'm shure they are much heavier. . I do detest the little 4 stroke 1 cyl bangers.
    Frosty,
    They are alllll total loss systems. Two stroke just dumps it's oil more directly.
    Easy Rider
     
  2. mwatts
    Joined: Jul 2009
    Posts: 66
    Likes: 1, Points: 0, Legacy Rep: 28
    Location: Netherlands

    mwatts Martin

    Hehe.. No-one can disagree with that. ;)
     
  3. powerabout
    Joined: Nov 2007
    Posts: 2,944
    Likes: 67, Points: 48, Legacy Rep: 719
    Location: Melbourne/Singapore/Italy

    powerabout Senior Member

    re the 2 strokes, 2s oil does burn so there is not necessarliy oil coming out of the exhaust, at least its bio degradable and 4s I dont think is..is it?
    You could always use the old castor ( bean ) oil, Castrol R1, makes a mess in your engine but it sure smells good
     
  4. Frosty

    Frosty Previous Member

    Cripes,-- my 2 stroke bike that goes shopping every day drips black oil from the exhaust. It got blocked last weeks and I srcaped of thick incredibly black gunge from the removable centre baffle.

    2 stroke oil burns!!!! ,--- some of it may do.

    And yes it is auto injection. I top up the tank once a year. I use about 1 liter per year.

    Stand behind one with white trousers on,!!!
     
  5. ondarvr
    Joined: Dec 2005
    Posts: 2,929
    Likes: 573, Points: 113, Legacy Rep: 506
    Location: Monroe WA

    ondarvr Senior Member

    I raced, modified and tuned bikes for decades, if there's black stuff dripping from the pipe its either because you don't ride it hard enough, its jetted too rich, the oil injector isn't adjusted correctly, or a combination of these. A clogged baffle is a typical issue on a bike that's not ridden hard enough. You getting old? lol.
     
  6. powerabout
    Joined: Nov 2007
    Posts: 2,944
    Likes: 67, Points: 48, Legacy Rep: 719
    Location: Melbourne/Singapore/Italy

    powerabout Senior Member

    True enough Frosty
    Imagine being in a East German traffic jam with a queue of Trabants!
     
  7. Frosty

    Frosty Previous Member

    Its a city bike and its ridden whilst stood still most of the time, if you know what I mean.

    Mine is no different than every one elses, except that my old Suzi Crystal can not be replaced, you can not buy 2 strokes any more from new.

    But it does have an emission test every year for road tax.
     
  8. sandhammaren05
    Joined: May 2009
    Posts: 436
    Likes: 35, Points: 38, Legacy Rep: 138
    Location: Texas & Austria

    sandhammaren05 Senior Member

    Why would it be wiser? Evinrude E-Tecs are more powerful and cleaner than 4 strokes.



     
  9. jonr
    Joined: Sep 2008
    Posts: 721
    Likes: 11, Points: 0, Legacy Rep: 57
    Location: Great Lakes

    jonr Senior Member

    One you are up to speed, 50HP is 50HP and a 2 stroke or a 4 stroke will be equally fast (except for the slight weight difference).
     
  10. sandhammaren05
    Joined: May 2009
    Posts: 436
    Likes: 35, Points: 38, Legacy Rep: 138
    Location: Texas & Austria

    sandhammaren05 Senior Member

    It's not just top speed, it's how long it takes to reach top speed. And, a 50 hp 4 stroke won't run with a pre-2000 2 stroke, won't turn the RPM. The E-Tecs would turn up if you could deprogram the rev-limiter. Someone did and won in Paris recently. Intake-burn-exhaust-intake-burn-exhaust - .... !



     
  11. SunnySkies
    Joined: Apr 2007
    Posts: 8
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: Tempe Arizona

    SunnySkies Junior Member

    Something to be said for hitting the key and quiet running with no smoke. I would say it depends more on the application. Given the size of the boat I would bet this is a non planing hull. Merc Bigfoots or similar engines are better suited because of thier gear ratios. There isn't a lot of difference between modern DI two strokes and four strokes anymore. IMHO
     
  12. sandhammaren05
    Joined: May 2009
    Posts: 436
    Likes: 35, Points: 38, Legacy Rep: 138
    Location: Texas & Austria

    sandhammaren05 Senior Member

    Sounds boring, I love the fine odor of 2 stroke exhaust. I'm writing about high speed planning hulls, relatively little wetted surface. Whether on our 330 lb nutshell with our 1981 7.5 hp (16 mph) or 1981 15 hp (26 mph), on our 350 lb high speed V-bottom (1983 35 hp, 42 mph), or with 250-300 hp, the 2 stroke is faster with far greater acceleration. My brother in law has a Honda 50 on a displacement boat. Ho-hum. Also, the idea of a small outboard is portability. With our 7.5 (35 lb) and 15 (75 lb) on the Baltic island, we transport the motor lying on its side in a hand cart to and from the storage shed to the boat. With the 35 (110 lb), I can throw it in the trunk of the car. Can you do that with your 4 strokes? How much do the equivalent motors weigh, and does oil run out when laid on the side? Ever see the video of the Evinrude 250 pulling the Yamaha 250 backward and under water?!
     

    Attached Files:

  13. Easy Rider
    Joined: Oct 2009
    Posts: 920
    Likes: 46, Points: 0, Legacy Rep: 732
    Location: NW Washington State USA

    Easy Rider Senior Member

    Now thats outboarding Sandham. My old 2 stroke Johnson or newer 2 stroke Yamaha hardly ever smoke at all and I've never seen any smoke from my Evinrude E-tech. I saw a twin cyl 4 stroke the other day w the head off and I could see that the pistons rise and fall together. All the old british motorcycles (4 stroke) did that. The reciprocating mechanical mass is as a one cyl engine! No wonder they shake when you get em reved up a bit.
    Sunny Skies, I bought the 2 stroke E-Tech after the 4 stroke Suzuki mostly to get simplicity. That Suzuki is a wonderful engine but very complicated.

    Easy Rider
     
  14. sandhammaren05
    Joined: May 2009
    Posts: 436
    Likes: 35, Points: 38, Legacy Rep: 138
    Location: Texas & Austria

    sandhammaren05 Senior Member

    I don't mind 4 stroke in car and lawnmower but wished I'd had a 2 stroke Yamaha motorcycle back in 1981. For me, outboarding without 2 stroke isn't outboarding. Actually, the E-Tec is at the limit. It's 2 stroke, but with fuel and oil injection is otherwise very much like a 4 stroke. Except that oil doesn't run out in the trunk if you lay it on its side ... . The E-Tec is so clean that is't allowed on Bodensee in Germany. The new Evinrudes arrived at a friend's dealership in Houston last Aug. with the EU (European Union) environmental approval stamp on the downhousing.
    I hate the propaganda that tries to outlaw 2 stroke motors (and I usually vote left/green).
     

  15. Wynand N
    Joined: Oct 2004
    Posts: 1,260
    Likes: 148, Points: 73, Legacy Rep: 1806
    Location: South Africa

    Wynand N Retired Steelboatbuilder

    I have an 85 hp Suzuki 2 stroke (mid 80's model) on the tail of my fishing boat and the only time I saw a bit smoke, is with start ups. As soon as she idles, no smoke - even accelerating hard or running like the wind there is not a puff of smoke to be seen...Although it is an auto lube, I also add 1:100 ratio 2s oil in fuel tanks just in case.
    Funny thought, no "usual" two stroke smell coming from my motor either - the other day riding with my friend on his ride, the Yamaha of same hp fitted smelled like a real two stroke motor:confused:

    Would I change for a 4 stroke? No
     
Loading...
Forum posts represent the experience, opinion, and view of individual users. Boat Design Net does not necessarily endorse nor share the view of each individual post.
When making potentially dangerous or financial decisions, always employ and consult appropriate professionals. Your circumstances or experience may be different.