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Old 06 May 2004, 13:47   #1
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Engine Choice

Hi

I currently have an Optimax outboard which I am pleased with. The performance is excellent and it has only let me down once and that was due to a faulty part.

However, I am trying to but together a specification for a new RIB and feel I need to explore the possibility of a 4 stroke. Does anyone have experiences / regrets of doing the swap ?

Just a few more details, I am looking to buy an 8m RIB and looking for an outboard in the region of 225+ hp.

Many thanks in advance.
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Old 06 May 2004, 13:48   #2
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IT ?

Sorry just had to do it. No harm meant.
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Old 06 May 2004, 13:49   #3
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Engine C

...hoice?
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Old 06 May 2004, 13:51   #4
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None taken ! But fair comment. More haste less speed !
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Old 06 May 2004, 13:55   #5
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Quote:
Originally Posted by pmorgan
8m RIB and looking for an outboard in the region of 225+ hp...
IMHO, no contest... Yahaha hpdi 250 or 300. They are the same 3.3 block, so the 300 make sense an a 8m RIB. But I would say that, wouldn't I?
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Old 06 May 2004, 13:57   #6
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I must admint I like the idea of a 300hp Yamaha as well - but they are £20K+ slight over budget for that I could have two optimaxs !
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Old 06 May 2004, 14:00   #7
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Originally Posted by pmorgan
300hp Yamaha...£20K+ slight over budget for that I could have two optimaxs !
Crikey! That put's a damper on it
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Old 06 May 2004, 14:04   #8
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Quote:
Originally Posted by pmorgan

However, I am trying to but together a specification for a new RIB and feel I need to explore the possibility of a 4 stroke.
Why? Optis are lighter and give better fuel economy figures.
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Old 06 May 2004, 14:35   #9
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Why? Optis are lighter and give better fuel economy figures.
Not when you're at WOT!!

Why not go all out and get a supercharged four stroke. Mercury Verado. Has power steering and looks like one serious piece of kit!!

http://www.mercuryverado.com


Was the faulty part anything to do with the power trim/ tilt? I only ask because my 135 opti will be arriving at the end of the month and I've heard that is a common problem. Great to hear good reports otherwise.
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Old 06 May 2004, 14:43   #10
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I have a mate with a 250 Yammie 4 stroke and it pulls 70 LPH at WOT. I don't think a 225 Opti is any thirstier than that.

I am with Tue go for the Opti. if you want twins think about two 175's
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Old 06 May 2004, 14:57   #11
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What I should have said that the opti is far more efficient below 4500rpm.

Rogue, spot on with the twin 175s. They'll be nice and light as they are essentially a tuned up 135. Roll on the end of the month.

pmorgan, what 8m are you looking at?
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Old 06 May 2004, 15:23   #12
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Quote:
Originally Posted by swginn
Not when you're at WOT!!
Was the faulty part anything to do with the power trim/ tilt? I only ask because my 135 opti will be arriving at the end of the month and I've heard that is a common problem. Great to hear good reports otherwise.
Hi swginn
The problem I had was with the water pump impeller the drive shaft separated from the impeller part giving me a cooling problem. The part was only a month old so I am assuming it was a manufacturing fault. I believe that the design might have been changed on later / larger models ours is a 1999 model. Have fun with your new toy !

Thanks all for your excellent feed back
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Old 06 May 2004, 15:23   #13
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Quote:
Originally Posted by swginn
pmorgan, what 8m are you looking at?
swginn I am looking at a Scorpion
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Old 06 May 2004, 15:29   #14
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There is someone on these forums who has an 8m scorp with a 225 honda 4/s
I cant think who it is but it must be worth talking to him.
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Old 06 May 2004, 15:42   #15
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Quote:
Originally Posted by simmons0
There is someone on these forums who has an 8m scorp with a 225 honda 4/s
I cant think who it is but it must be worth talking to him.
Thanks simmons0, I met him on course the other weekend, talking to him has made me decide to try and get the RIB this seasion and not wait till next ! He is happy with his Honda - but I am still in the 2 stroke camp at present!
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