would you buy a counter rotating motor?

[The Woo]

Only issue I would consider besides the prop price and availability is the weight balance of the boat in that most of our regular trailer boats have weight biased to the starboard side which usually is offset by the clockwise rotation of a standard rotation motor so it balances out to a degree.
If you have some extra weight on your starboard side now and add to that a counter rotating anti clockwise prop, the boat may lean significantly to starboard while under way, which may need active devices such as trim tabs to control the roll to starboard.
Severity will depend on the boats design and current weight distribution.

I think you might be slightly overstating the effect of a left hand rotating prop AND the abilities of manufacturers to build in a bias toward a particle prop rotation direction..... just sayin

[fisho64]

yeah I agree Woo.
BUT on some boats the transducer placement can have an effect.
On the port side the blade on a standard rotation is coming up and can put a pressure wave/pulse across trannie reducing performance.

While on the subject if anyone is selling a counter DF115 and would like to swap the box with a standard rotation, let me know!

[tunaticer]

I seem to recall reading many years ago that the standard prop rotation was settled on because tiller steers were designed to be used left handed. An opposite rotation prop would give a different and harder to control torque feedback to the hand piece.
I think this was on an old mercury or evinrude manual or something.
Forward controlled engines and being the southern hemisphere and the cold water vortex of the coriolis effect I think would negate this argument somewhat however I am sure there are a few mathematicians out there who could develop a formula to check the lunar gravitational pull that may interfere with the harmonic pitch balance in the occurance of a gamma radiant solar flare. Either that or the fact that it is an ETEC could prove to giving less than desired effects.

[bobbyb]

thanks for all the responses, but i just can't help feeling it's just not rite.

i guess it's about how much i value money over how much i love my boat. i an a fusspot about my boat and we all want them set up right because thats our little part of the world where we can escape and every thing is ideal. maybe sleep on it a couple more nights.

has any one out there actually had a boat with a single counter rotating motor????

[Fed]

I'm with John on this, post #15.
Dashboard, steering, gauges, wiring, battery, driver, it all adds up.

Then there's the resale, I bet a lot of people would be put off when you point out it's a lefty.

Having said that I don't know if it would be noticeable but not worth the risk in my books. It's just not right.

[caravellerob]

Bobbyb a mate and I were halves in a 6 metre riptide centre cab, we had a 95 model suzuki 200 2stroke counter rotation. We had to trial a few different props to get the best out of it but there was no problems in having a counter rotater on the boat. It was a bit more difficult getting a prop (ended up with a 4 blade mercury offshore) if you can get the right prop for it easy enough I would have no problem in buying another counter rotater. One other thing to look at is at least you won't get your prop stolen (not by somone who knows what they are looking for anyway)

[rocklobster]

A counter rotating engine makes absolutely no difference to the performance . Prop thrust under heavy accelaration will make it pull down on the starboard side and with a standard rotation ,pull down to port. I read somewhere where who ever the guy was who invented outboards decided he would make them stardard rotation and thats how it started . Read the yank forums and before there was CR engines ,they used to run two standards which would have caused a lot of prop torque pulling down to the port side . Propellers are just as easy to purchase as a standard rotation . i was reading a few nights ago where an engine salesmen in the states sells a lot of outboards to Mexico and sells as many CRs as SRs . People automatically see a CR and assume it has come of a cat . I have a 250 hp CR on a 6 meter boat and you would know the difference . If you are getting it at the right price buy it , Just dont buy the etec.

[Spaniard_King]

thanks for all the responses, but i just can't help feeling it's just not rite.

i guess it's about how much i value money over how much i love my boat. i an a fusspot about my boat and we all want them set up right because thats our little part of the world where we can escape and every thing is ideal. maybe sleep on it a couple more nights.

has any one out there actually had a boat with a single counter rotating motor????

I have sold 2 150 counter rotating engines to mates who have no issues with the setup, I can give you there numbers if you want to chat with them

[bobbyb]

thanks gents, so it seems it' more all rite to buy a lefty then buy a etec.....

i think they are cheap because not only are they a lefty but there a etec, haven't heard to many people praising them lately, a forum like ausfish can have a huge impact on a business, but thats the new world of social media for you. had a brand new df150 lined up but when i turned up with a pocket full of cash i found he was wrong about the leg length. any one know where i can get a good (low hours) 150-175 (20inch) give me a bell. maybe some one out there that repowerd and wish they had gone bigger. cheers.......