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Old 14 April 2003, 11:16   #1
TIM
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200-250 Ob, 4 Stroke Or 2

OK I know I was asking about Diesel / Stern drives, But looking at the extra costs of a diesel instlation i.e about 9,000, That will buy a whole lot of petrol...........

SO, the queastion is 2 stroke vs 4 stroke and which is the best motor, to go for??? Honda, Yam. Evinrude, Mercury etc.....

OR it Diesel the best way to go??????
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Old 14 April 2003, 12:23   #2
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I've found the Yam 200 HPDI to be a good engine. No way as efficient as a diesel, but it gives you the responsiveness of a 2 stroke with much better fuel economy.


I think the mercury optimax? and evinrude ficht technology is similar to HPDI.

As far as 4 strokes go - they tend to be much heavier and less responsive, which you don't really want, especially on smaller boats.

Ricky
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Old 14 April 2003, 12:39   #3
TIM
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How many Liters per mile are you getting
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Old 14 April 2003, 12:47   #4
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The pros and cons of various outboards have been debated at length if you search back through the mists of time on the forum. For info I get about 1l per mile from a 200Yam Hpdi on a 7.75m boat at cruising speeds of 30-35kts. But I got moreorless the same from a 150 Opti on a 6.45m boat before that. Yams supposed to be better engineered & certainly is quieter than Opti.

Alan
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Old 14 April 2003, 13:45   #5
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At the moment i am having twin 200hp Evinrude Ficht's installed on a 32ft Scorpion cabin cruiser, replacing 2 x 300hp Merc promaxes. Once i start putting some miles under the belt i will let you know about fuel efficiency/noise etc.
Yamaha have a good reputation and a well proven history, however Ficht technology in the right hands ie. Bombardier are quoting some impressive figures that match and sometimes better Yam 4 stroke and other 2 stroke technology. Wether this is actually the case, only time will tell. With Ficht you get a 3 year warranty and the initial price saving over Yamaha make it a more attractive option, with noise levels and fuel consumption no worse if not better than competitive technology.
Ficht technology coupled with Bombardier's engineering expertise is one for the future. Bloody expensive if i am wrong though !!
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Old 14 April 2003, 15:10   #6
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Fichts are the dogs bol**x , We have about 300 hrs on ours and they have run like a clockwork mouse... The only draw back is ficht ram oil that you have to use at 34 for 3.75 liters, its a pain in the ass..... But the get up a go is fantastic.....
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Old 15 April 2003, 02:58   #7
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The HPDI is cheaper to service and run than the optimax. It uses any type of 2 stroke oil where as the optimax and the ficht both take special types. The optimax is louder but would defiantly be my choice of the 3. I would not get a Honda 225 as they are heavy and have less power at the top of their range. Get an optimax of a HPDI they are the best 2.

Optimax for speed and power
HPDI for economy and reliability ect.

The new 2 stroke designs are so much better than the old I would only get a 4 stroke now if the boat is going to spend the majority of it's time at tick over. Ie If I need a boat to teach in 4 stroke, If I wanted my own boat 2 stroke.

Up to you. I would look at the use for the engine, weight, initial cost, running cost (remembering that Yamahas can take most 2 stroke oils (valvaline ect)) service intervals, warranty lengths, where your nearest support for is, the boat it is going on. (talk to owners some boats are better with some engines some work some do not.)
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Old 15 April 2003, 04:11   #8
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I saw the latest Mercury and Mariner big 4 strokes at the london boat show. I think they were 225hp. They were huge, i thought my 300hp Promaxes were big until i saw these monsters. I can't see these engines being practical at all, the physical size and subsequent weight, without the grunt of a 2 stroke leave these engines with no advantage over a modern 2 stroke. The prices were way over the top as well.
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Old 16 April 2003, 11:30   #9
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what were they priced at. out of interest. Does any one have a veiw of what the best big 4 stroke is. other than the honda 225 I have only seen / used big 2 strokes?
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Old 17 April 2003, 05:04   #10
TIM
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I have been doing some research on the web, From what I can see in four strokes, the Yam 225 is better, as it has more 'power' if you know what I mean at the top end compared to the honda, in fact its hard to find any thing bad about them on the net......

As Far as 2 strokes Go Yamaha have the lead followed by Mercury Opti and Evinrude are Last, But the new generation Of Fichts or D.I. as they now like to call it, are starting to get great reviews and they went the stigma of unrelibilty goes away, I feel they will be the best, They certianly have the best technology out there at the moment.....

I think on the new RIB I will go for the Yam 225 4S
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