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Old 06 November 2015, 13:38   #51
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As said before it got taken down by !!!!!.. this is less of a discussion and more of a commercial interest plug!

Ohh I dunno! I thought it had been quite reasoned & mature compared to the usual standard, it'll probably go downhill now though


.....sh1t happens.......
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Old 06 November 2015, 13:41   #52
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Not by me PD! Would be interesting to put say a Yam 90 Two stroke against an ETEC 90 two stroke which would be like for like and not a completely different engine
Old Yam 90 AETOL 119kgs
Latest ETEC 148kgs..???
The ETEC 90 is a great looking engine but why so heavy and comparing two different cycle engines to one another is far from ideal or remotely accurate!
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Old 06 November 2015, 14:24   #53
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Not by me PD! Would be interesting to put say a Yam 90 Two stroke against an ETEC two stroke which would be like for like and not a completely different engine
Old Yam 90 AETOL 119kgs
Latest ETEC 148kgs..???
The ETEC 90 is a great looking engine but why so heavy and comparing two different cycle engines to one another is far from ideal!
It is most likely a result of the HP fuel pump and injection being added accounting for most of the difference.

They are physically bigger too, I think more cubes too over a yam 90? probably a bigger gearbox and more oil to handle that special torque they bang on about in the stupid videos only idiots buy into.

They will never do like for like, closest being an optimax as there is a good chance an optimax would be equal and that is bad for making stupid videos showing sinking boats.
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Old 07 November 2015, 06:02   #54
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Bond was using merc four strokes in spectre last night?
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Old 07 November 2015, 08:41   #55
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Bond was using merc four strokes in spectre last night?
It's called "product placement"

Re. the weight differences between 4 & 2 strokes. 4 strokes are inherently more complex than 2s, many more moving parts, cams, valves etc. If 4 strokes are now approaching or indeed beating the relative low weight of 2 strokes, where's the weight going? what's being shaved off & cut out? I'm not trolling here, or needlessly fuelling the debate, I'm genuinely curious as to how you achieve the low weights of 2s with a 4s
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Old 07 November 2015, 09:06   #56
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It's called "product placement"
...and the Bond movies are right at the top 'splash for cash' game.

Landrover/Jaguar, Sony, Omega.........
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Old 07 November 2015, 10:26   #57
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The new mercury 4stroke outboards(75-150) have reduced the amount of parts and should be easier to maintain on DIY basis compared to previous models. They used to have dual overhead cams but now single, halved the amount of valves. This with still better performance and less weight than in previus models. IMHO they are going to the right direction, would be my choice if would buy a new 4 stroke in that range.
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Old 07 November 2015, 10:27   #58
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It's called "product placement"

Re. the weight differences between 4 & 2 strokes. 4 strokes are inherently more complex than 2s, many more moving parts, cams, valves etc. If 4 strokes are now approaching or indeed beating the relative low weight of 2 strokes, where's the weight going? what's being shaved off & cut out? I'm not trolling here, or needlessly fuelling the debate, I'm genuinely curious as to how you achieve the low weights of 2s with a 4s
They are still about 50lbs heavier than an etec for engines I've looked at (150-250hp)

However, as I said previously, they have clearly been spending their money on weight reduction and better materials must come into play.

However, being a cynical git, I do wonder how thin all the bits are on that yam mentioned.

Re 4 strokes being more complex..... with power steering, auto trim, fancy oil injection systems and direct injection with high pressure fuel pumps, are they still more complex?. Not a single 4 stroke has any of that just now.

In terms of moving parts, ofcourse the 4 stroke has more, but we can't call a timing belt or chain complex in this day and age surely. It is a basic mechanical system that is taken for granted in our cars, why not Outboards?. That g2 is just as complex but in a different way. The days of basic engines are over for most.
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Old 07 November 2015, 14:15   #59
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Sometimes I think this is over thought I follow the car industry that's the way it's going 2strokes went long ago Saab, foden lorrys to name two but we will throw the beer in the boat and you never know just in case items not giving weight another thought but buying an engine wow it's 5kg Heaver that it nearest rival such a problem my take is P for plenty max HP 2 or4st
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Old 07 November 2015, 15:07   #60
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Sometimes I think this is over thought I follow the car industry that's the way it's going 2strokes went long ago Saab, foden lorrys to name two but we will throw the beer in the boat and you never know just in case items not giving weight another thought but buying an engine wow it's 5kg Heaver that it nearest rival such a problem my take is P for plenty max HP 2 or4st
P for Plenty!.....Gotta make that right!..whichever Stroke ROCKS YOURE BOAT!
(Obviously coupled with a bit of C.S.!)
Then it's pay YOUR money and Take YOURE CHOICE!
Different strokes for different folks??
Main thing is and always has been CONFIDENCE IN YOURE RiG! ...(All Of it!)..Then right Cruise in the right company!
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