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Old 06 December 2006, 05:06   #1
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Four strokes

The question "opti or etec or ?" seems to crop up all the time for 2 stroke engines but I can't really remember seeing anything on here since I joined about the pros and cons of different four strokes? I did a search but of course "four stroke" brings up half the threads on the forum so that wasn't what I needed

If all goes to plan and I get my Mac 570 the power limit on that is 120hp so it'll be a 115 for it I guess. Mac themselves (Marine Revolution) offer the Yamaha 4 stroke range, which from observation seems to often be fitted to boats that are cost-no-object e.g. tenders to expensive luxury boats (we've got one anchored in the harbour here at the moment with a plush looking Orca rib and a Yamaha 115 on it). The Suzuki DF115 is the other main option.

Is there much to choose between any of them in terms of performance or reliability? I haven't got prices yet but that will also be a factor. Any other comments would be interesting from people that use either of the above engines.

Ta
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Old 06 December 2006, 12:41   #2
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4 vs 2 stroke

Quote:
Originally Posted by BogMonster View Post
The question "opti or etec or ?" seems to crop up all the time for 2 stroke engines but I can't really remember seeing anything on here since I joined about the pros and cons of different four strokes? I did a search but of course "four stroke" brings up half the threads on the forum so that wasn't what I needed

If all goes to plan and I get my Mac 570 the power limit on that is 120hp so it'll be a 115 for it I guess. Mac themselves (Marine Revolution) offer the Yamaha 4 stroke range, which from observation seems to often be fitted to boats that are cost-no-object e.g. tenders to expensive luxury boats (we've got one anchored in the harbour here at the moment with a plush looking Orca rib and a Yamaha 115 on it). The Suzuki DF115 is the other main option.

Is there much to choose between any of them in terms of performance or reliability? I haven't got prices yet but that will also be a factor. Any other comments would be interesting from people that use either of the above engines.

Ta
Hi Stephan, Rib Int did a good piece on 2 vs 4 in last issue. It covered more than just the usual, sort of back to "green" basics.
I would add to that one more important thing as follows: I believe that no matter how right or wrong the argument is, the greater unwashed will move to 4 stroke and those who have to will stick to 2 stroke for reasons of less moving parts, easier to service and a Spark plug clean will normally do the job.
The new ETAC seem wonderful if they work and many say they do. However, the general move is to 4 stroke and thus I would question the resale value of any big 2 stroker. You can see it clearly on the pricing of Ballistic in www.Ribsforsale and www.boatsandoutboards.
If the resale price does not matter then do what you like. Meanwhile for deeper v hulls it takes a bit more oomph for a 4 stroke to pull the skier up. The two stroke seems to have more of this oomph at low revs...
I may be wrong about this argument but I dont think I am wrong about the values.
Having read reviews, the Suzuki 140 DF seems to be a fantastic engine, Codprawn sent me a great address for checking out this and Johnson 140

Aidan
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Old 06 December 2006, 13:15   #3
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I would look more at who is the best to service your engine. have got susuki 200hp and have had no issues with engine, only the service agents and the back up for spares. (3 weeks for power trim seals??)
Etec sounds good if they do what it says on the can,just so happens the local Evenrude agent is pretty hot around here.
A new angle of the question, but a very important one.
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Old 06 December 2006, 13:39   #4
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Not going to get into the 2 stroke vs. 4 debate.

As for the Yamaha vs. Suzuki question, I think they've both proven to be pretty good. I have a F115 on my boat; 130 hrs, not a hiccup yet.

Price point, I think (probably depends on local availability more than anything else) that the Suzuki will be a tad cheaper; but as Peter mentioned, don't forget to factor in proximity of service (not that there's much to do in either case; I've done my own 10 and 100 hr service, pretty simple stuff, though I'm not sure the manufacturer will use that as a selling point.)

I had a Honda 4 stroke on my SIB, and never did find a good shop to take it to.

If weight is an issue, a serious look at 2 strokes would be in store; for me, the (perceived) improved emissions had a lot to do with the choice (Here, in California, they're starting to ban 2-strokes on some lakes.)

jky
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Old 06 December 2006, 15:10   #5
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OK, well servicing is irrelevant here because there are no agents for any of them! So out of the box reliability is important because if it doesn't go wrong I won't need an agent do NOT want something that requires "expert tinkering" all the time or is likely to arrive with a fault.

Four stroke it has to be because I saw a Rigid Raider with a pair of DF140s on the weekend and they sounded so fantastic, so quiet you could hardly hear it on idle and when I later heard it going down the harbour at full chat, that was quite nice too I absolutely love something like that which runs like a sewing machine instead of a rattletrap 2 stroke belching smoke everywhere when idling. Maybe new generation ones don't but I don't have any experience of those and I work with mechanical stuff and just don't really like 2 stroke engines of any sort.

Since Mac offer the F115 on their boats I'm assuming that the weight (190 odd kg for the 115) is ok with the boat I will probably be hanging it off and the Suzi is about the same (a couple of kilos heavier but that is all).

I did see a very tempting price on a Vipermax in another part of this forum though, which has made life even more complicated
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Old 06 December 2006, 15:19   #6
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Stephen I have a suzi DF115 and must be said I am very happy with it .I have experience with both 2and 4 strokes and the suzi suits my purposes very well There is definately something about a 2 stroke when it comes on song ,but the suzi is smooth and eerily silent, at tick over you cannot tell its running,bags of low down torque,and a very compact unit .Servicing is an issue , Ive had the hood off and soon put it back on again ,so I would imagine your choice will be made up for you by the location of your nearest dealer.If you need any more info I would be only to pleased to help.
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Old 06 December 2006, 15:28   #7
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My Suzuki DF 140 sounds suprsingly meaty for a four stroke. Only when its above 5000 revs though.
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Old 06 December 2006, 15:28   #8
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Sorry Stephen you posted while I was pondering Have had no problems with the Suzi ,100 hrs on .
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Old 06 December 2006, 15:32   #9
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Biggles what hours has your DF140 done ,Where do you get it serviced.
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Old 06 December 2006, 15:46   #10
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Toby,

It has 150 hours. As I am not the first owner I haven't needed to service it yet. As it is the engines been over serviced, Three services so far and I have all the engine printouts which look good, other than a battery low indication on each and every printout and service, even when it was PDI'd. No problems on the starting side.The previous owner used Fairweather Marine in Fareham though.
Contact Nautibuoy for his dealings with Fairweather.
Having said that its probably where I will be taking it in a few months time.
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