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Old 23 March 2012, 11:39   #11
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Whilst the 175 is ideal as it is the same weight as the 150, you will struggle to find one. I've only come across one other on here! The reason is the retail price of the 175, it is vastly more than the 150, which itself is only a little more than the 135.

Reason i believe is the 135 and 150 are exactly the same, just a different ecu. The 175 has other parts as well as the ecu to make it more powerful. As a result, most punters take the 150, which on the 6.3 OP hull is plenty for most, hence they're the most common.

If you jump to the 200, the engine weight jumps too, as it is a 3.0 block. I think excessive on the 6.3 hull, but over 6.5m perhaps the better option. More money, more fuel, more costs though.

Check which beam OP you are looking at, they do vary! Ours is the 2.34m
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Old 23 March 2012, 11:40   #12
sib
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I've now done around 15 hrs with the new Merc/Mariner F 150 Fourstroke. 205 kg. Bags and bags of torque, easy to service, less expensive to buy. Hard to get hold of as the yanks keep them all for themselves. I had a 150 Opti before that and this new engine is something else...YouTube it for more info.
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Old 23 March 2012, 11:45   #13
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I've now done around 15 hrs with the new Merc/Mariner F 150 Fourstroke. 205 kg. Bags and bags of torque, easy to service, less expensive to buy. Hard to get hold of as the yanks keep them all for themselves. I had a 150 Opti before that and this new engine is something else...YouTube it for more info.
Interesting, not seen one yet.

What's the throttle response like compared to the 150 opti? To me that is the one downside of 4strokes, of those that i have seen. Is it really cheaper for 150 4s? If so, what's the downside then, other than weight?
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Old 23 March 2012, 11:58   #14
sib
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My 150 Opti was pushing a 6.5m Tornado and we usually ran 100 kg of fuel in her. The new Merc 150 F Fourstroke is pushing a 6 m XS often with 180 kg of fuel. I would say response quicker on the new set up, lighter boat slightly but it's the initial torque that is very different. Running it in I saw 46 mph as I needed to give it the beans for this process sometimes. Possibly not as whisper quiet as the Yams but not bothered by that as it's still pretty quiet and more importantly a few thousand less expensive. It seems extremely solid too. I would have no hesitation on putting this engine on a 6.5 - 7m rib.
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Old 23 March 2012, 16:22   #15
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=

6.3 ribquest with 140 suz used 60 to do 80 mile round Anglesey. , .
Says who
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Old 23 March 2012, 16:34   #16
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Just like V6 cars, great noise when you accelerate, but quiet at a constant speed.

Does yours move then

its always attached to a chain when i see it
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