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Old 08 January 2004, 10:53   #1
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Country: UK - England
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opti 135 or F115

I have just been told that Mercury are doing a deal on the 135 Optimax for the boat show and its only going to be 200 extra to the F115 Whats best four stroke or two or is it just about the power.
The rib is a Avon 620 when finished.
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Old 08 January 2004, 11:45   #2
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Yamaha F115
Then suzuki 115/ Mercury 115
then opti's.

In my opinion. God this is gonan start another opti vs 4/s discussion(argument)
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Old 08 January 2004, 11:52   #3
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The mercury is the yamaha engine so I'm told.

Is the two stroke smelly compared to the four?

Also with the Optimax you get all the gauges
Is 20 HP worth the extra 200 ?
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Old 08 January 2004, 12:00   #4
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Oh for sure the boat will be a fair ammount faster with the 135 opti but do you really want the extra speed.
If you do want it them fair enough, but remember its still a 2 stroke. I doubt it will be any smelier after the over oiling during run in, Best ask Daniel about that.

It'll be a bit noisier and a lot more thirsty. True they are economical but they can't match the mercury 4/s and you will have to buget for expensive opti oil.

Will someone confirm whether yamaha and mercury are the same engines?

Mercury/Mariner are the same. Mariner usually cheaper.
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Old 08 January 2004, 12:36   #5
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If you have to think about it then you really need the 4 stroke.

I don't think you'll have much difference in Fuel economy
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Old 08 January 2004, 12:38   #6
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return of the wavehumper!
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Old 08 January 2004, 12:54   #7
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Id get the opti any day over the f115. The opti is only 20 more hp, but it will feel alot more than that, its a v6 block (f115 is a I4) you'll have alot more torque. Id say the opti would even give you better gas milage, because it's not going to be working as hard.
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Old 08 January 2004, 13:05   #8
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You have got to look at what you intend to do with your boat. If its for family use i would go for the four stroke. i use my boat on the Thames local to me and a four stroke is better at low speed. if on the other hand you want to blat arounf flat out then go for the 2 stroke
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Old 08 January 2004, 13:21   #9
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The Merc/Mariner 115 engine is the same as the Yamaha as far as I'm aware (in that we can order Mariner bits from Barrus and they fit the Yamaha).

I would favour the Opti over the F115. Fuel economy is better on the Opti and since its larger will not be working as hard. It won't be smelly and smokey like most two strokes as it uses far less oil. The noise is a bit more than the F115 but it makes a great growly noise when first starting and when accelerating. Also they can be run on standard Quicksilver oil (at least they could up till last year, don't know if thats changed now) so oil costs are not going to be huge. I think it might be a bit lighter too.
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Old 08 January 2004, 13:36   #10
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Merc 115/135

Just got back from Excel and had look at all engines, i would go for new 115 optimax, cheaper than F115 and 135 opti, faster than F115 and lighter and better on fuel than 135 opti, also looks outstanding.




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