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Old 10 August 2006, 14:20   #11
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Surface drives generally cannot be trimmed i.e. are fixed in position. They also generally require a seperate gearbox which outdrives do not. Finally as outdrives are much more prevalent they are relatively (and I mean relatively) cheaper!

The only surface drive RIB I can recall was Mike Deacon's 3rd Hot Lemon. He had tabs for lateral trim but had no way of trimming up in a following sea which made handling a little interesting IIRC.

Yanmar 315's and Bravo 3x's are a bad combination as Tim says. Failure is only a matter of time.
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Old 10 August 2006, 16:41   #12
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Quote:
Originally Posted by pop
.....i just said i was looking at a D6 280 hp you said there was no such thing ....
I don't remember saying that.
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Old 10 August 2006, 17:32   #13
pop
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j walker u said i thought the D6 was 310 to 370hp, implying that there was no D6 280hp that i was on about. go away if you have no usefull info, why do you just post ballshit when i am trying to learn about what i want to lern about?

so i guess the best option is to stick to the sterndrive? what is the best combination i do like my yamaha just wish she had a little more, whats the new one like? i dont normaly like bying new engines as they take 2-3 years for the manufacturer to sort out. what are the prices of the new yamaha?

have you looked here www.zf-marine.com they look quite a nice setup

thanks people
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Old 10 August 2006, 19:33   #14
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Quote:
Originally Posted by pop
j walker u said i thought the D6 was 310 to 370hp, implying that there was no D6 280hp
Pop, you've picked me up completely wrongly. If we were having a chat to you face to face and you said you were interested in a Volvo D6 280hp and I replied, "I thought the D6 was 310 and 370hp." would you give me an agressive reply or would you make a more civil reply along the lines of, "They make a 280hp too, I've been looking at it on a web site." ?
Quote:
go away if you have no usefull info, ..
Since I don't know you and you were asking about engines in the 280hp & 310hp range, I thought it might be useful to make sure you were also aware of the 310 and 370 engines and I took the trouble to post pictures of them for you. I also mentioned the lack of a compressor just as additional info and highlighted the possible effect on performance if that engine was used.

If it was the case that you were already aware of these motors and their characteristics, fine, you could have simply said so.

I apologise for intruding on your thread and posting information that was of no use to you.
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Old 11 August 2006, 05:34   #15
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Bigger Yam?

Hi Ben,

Have you considered the Yamaha 422 275hp or 432 315hp on Yamahas new twin prop sterndrive? They should drop straight in.

There's a chap in the marina here who's got one in an 8m Coastline and is very pleased.

Should give you the extra performance you want with an engine with which you are familiar. I take your point about the awquardness (sp?) of repairs but I guess Volvo / Mercruiser / Yanmar will all be similar.

Also consider the backup that there will be when you get to NZ. No point having an engine that you can't get spares for.

Fitting a surface drive would be expensive and not necessarily successful - a project best left to the manufacturer to develop I feel.
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Old 11 August 2006, 05:34   #16
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JWALKER ...... I am not sure on the D6.........

POP...... yamaha do a new 275hp which is the same engine you have ...but slighlty bigger turbo and uprated pump ...and has electronics bolted on to it too.....

the 240hp you have , can be turned up by 20hp with a simple tinker with the fuel pump and alot of people get this done ..... they put out a bit more black smoke ... but who cares !!!! you say you run your engine at 3000.... I think the WOT is 3800rpm .... and I sure you could run that engine at 3600rpm for extended periods of time with out ill effects ...infact its better to run a diesel 'hard' than overloaded.

the new yamahas 275phs and the 315hp are still the same 4.2 block ...so they should be very reliable ..... also the 'new' duoprop that yamaha have now, is a combination off volvo duo prop bottom leg and yamaha hydra drive on the top for the gear shift. Yamaha and volvo developed the duoprop for volvo, and yamaha werent allowed sell the twin prop gearbox in US or Europe , but it was on sale some Arab countrys under the yamaha name ...... that licence agreement ran out last year .....so the new yamaha stuff is well proven and its been currently well tested ....so I think it will be proven to be one of the most relaible stern drive units on the market........ Or the Volvo ... but there is a large weight penalty for that.
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Old 11 August 2006, 08:55   #17
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Duncan thaks for the post what rib is it? i might go over and have a look see if i can meet the man who ownes it, i agree about the sp i would get scorpion to do it if i was. however the way my mind is going is back to the big yamaha, i have a dealer in NZ five mins up the road from where i am living.great to see you out on the water.

Tim thanks for your info, i am trying to find out a little more about the big yamaha what is the time it takes to get a new engine? is the pump a uprated water pump? how do you get more horses out of your engine? (tell me the secret)

jwalker we all enjoy the same thing so lets relax and remeber this is fun, sorry if we got of on the wrong foot. do you have any info on the big yamaha? how do you find that volvo ?


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Old 12 August 2006, 19:29   #18
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Sorry i should have been more exact in my posts, the uprated pump i was talking about was the fuel pump......

and to get the extra hp from your current engine there is a wire locked bolt on the fuel pump, that has to be ajusted to allow the squash plate in to travel more, and allow more fuel to be pumped into the engine...... I dont know exactly how too do it but lots of people do it to your engine, so it shouldnt be hard to find out.
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Old 13 August 2006, 17:42   #19
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Mercruiser

Hi
if youre looking for a big diesel, why dont consider the Mercruier 320 HP
. We have run 250 hours this year in a 9,5m tornado and except some small problems with the brackett for the heat exchanger (dont know if this is the proper word) it has run without problem.
We change oil/filter every 50 hours, an run it on a bravo one drive
wich also has been running without problems.
You can also get this engine with a gearbox if you like to go with a surface drive.
A friend here in Norway is currently testing out a new 9,5 meter wich is
specialmade for surface drives. He is getting respectable performance out of it with a 300 hp Mercruiser.

The Mercruiser is much faster in acceleration than the Yanmar.

Good luck
Roy
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Old 14 August 2006, 07:59   #20
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Looking at the sort of hours and type of running that you are doing I personally would replace your existing engine with one of the new Yamaha Range. I have around 110 hours on the new STi 422 since the end of April and they are fantastic. They are extremly good on fuel, considering that they are pushing a 11m boat.
I looked at both the Volvos and the Yamar range before opting again for the Yamaha-no electronics on the base model . IMHO yanmars are only reliable enough to use as ground tackle for moorings .
Recently saw a unit that had around 80 hours of running during 18 months that was eating it's self away from the inside out- and the boat was not kept on the water. Yanmars response......it's out of warranty .
Andy
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