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Old 16 February 2014, 17:49   #1
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mariner 125 hp 2 STROKE

What do you think of the mariner 125 hp 2 STROKE pre optimax
It's a 2002 model and I want to put it on a 6.1 meter tohatsu one design
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Old 16 February 2014, 18:01   #2
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Originally Posted by simon23 View Post
What do you think of the mariner 125 hp 2 STROKE pre optimax It's a 2002 model and I want to put it on a 6.1 meter tohatsu one design

Well I've got a 1997 150hp V6 and won't change it. Wot what a sound and grunt you'll love it!!

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Old 17 February 2014, 03:50   #3
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go for it! you giving up on the tohatsu?
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Old 17 February 2014, 04:09   #4
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That should be the 2+2 system on it , not very good for water skiing.
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Old 17 February 2014, 04:14   #5
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They are awful!

Its a 4 cylinder model, which runs on 2 cylinders up to around 2,000 rpm, then the full power kicks in. This makes them lumpy at tickover and also they are quite difficult to control coming into berths etc as if your on that threshold of revs and need a bit more to bring her in (thus going over the 2,000rpm range) you suddenly get a whole heap of power.

It was a model not built for long. The the same with the 4cylinder 115, you get used to them but not a lot of people like them. Some people had concerns on how the cylinders get oiled when running on 2, although I don't think its a problem.

The benefit is they are a bit more frugal on fuel at tickover and once your used to controlling the power are smoother midrange engines.

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Old 17 February 2014, 04:17   #6
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Boats&Outboards, you got it in one, I tried to say it a bit more gently. I must be getting old.
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Old 17 February 2014, 05:42   #7
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Well you learn something everyday on here. That's the reason it's such a good forum.

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Old 17 February 2014, 05:59   #8
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Mariner 125

I had the same motor on my first RIB - as the wizzos on here have said, its a very abrubt jump from 2 to 4, quite weird to handle and a pain in speed restricted areas.
I had trouble with freezing carbs in the winter trips to Tobermory (solved by the addition of a mercury 'cold weather kit' ---- a small selection of pipes and tees to route water round the carbs I recollect)
The bottom carb also seemed to attract salt(water) and give issues and I really dont think the 2+2 made any great difference on economy. Quite a thirsty beast and temperamental to start /flood compared to the newer outboards. Swapped it for an Opti
I wouldnt opt for one unless its the best/only option you have
The one 'advantage' is of course - 'simple' to work on with no electronics
Jeff
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Old 17 February 2014, 07:51   #9
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id never heard of this 2+2 system, it does sound a bit crap! my force 120 is as basic and crude as a wheelbarrow, but has some real grunt behind it as well as being controllable at low speed.
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Old 17 February 2014, 07:56   #10
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Force was a brand name from mercury its a commercial obm , (supposed to be easy to repair)
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