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Old 25 April 2003, 10:35   #11
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Hi all

Wouldn’t recommend fitting a left handed prop on a standard rotation gear box, Effectively you are running the box in reverse the whole time. The Counter rotation boxes have different gears in than the standard, Must be the case otherwise why would engine manufactures sell two different outboards. I can’t see what you would achieve in doing this anyway, torque effect is created by the single prop spinning in one direction. Sounds to me like offset, The boat manufacture would know what offset you should be running.

Cheers

J
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Old 25 April 2003, 14:57   #12
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Gears which turn the drive through 90degrees are called bevel gears. The ones with a twist are spiral bevel gears. There are a few different profiles for these.

Put a left hand prop on a right hand gearbox on an outboard motor. You are joking, aren't you?

JW.

Alpha stern drives... now that's a different matter.
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Old 26 April 2003, 04:03   #13
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Quote:
Originally posted by jwalker
Put a left hand prop on a right hand gearbox on an outboard motor. You are joking, aren't you?

JW.

Alpha stern drives... now that's a different matter.
Oh no it isn't. Under no circumstances should you put a left handed prop on an Alpha, (unless of course it's a contra rotating)
Your probably confusing it with a Bravo, whose rotation is decided at the control box end.

An Alpha lower unit is basically a V6 outboard gearbox.
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Old 26 April 2003, 04:56   #14
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Agree with the others absolutely not to a left handed prop on an outboard - reverse gear is not up to being run constantly flat out and the box will blow up sooner or later!

The solution to your problem is driving the boat in choppy conditions more and getting used to what it is going to do and counteracting it - it is something you have to learn, and will come naturally eventually.

Trim tabs don't work in the air either!
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Originally Posted by Zippy
When a boat looks that good who needs tubes!!!
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Old 26 April 2003, 05:38   #15
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Humble pie

Yeh, DD's correct. Bravo drive it is, not alpha. Sorry.
Jeez, I'm getting old.

J (with the long white beard) W.
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Old 26 April 2003, 08:15   #16
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Well on first reading this I thought it was simple weight distribution, off set engine mounts and driving style.

I dont see that changing props from left to right has much to offer, it will turn the other way! But I ll accept there could be a technical reason from an expert, by Id avoid spending the money and do simple things first

I would keep to basic principles of boat trim / balance and driving skills. This is not using the engine trim or trim tabs but stuff in the boat.

Weight distribution can change the ride of the boat at low and high speeds. Having someone sat up front makes a difference, infact on a calm day on a boat upto 6m the movement of a large person can be felt and even seen on the ride.

More so, I would be thinking about backing of the power if getting the whole hull out the water as its the engine torque through the prop twisting the boat when the hull provides no resistance (and you dont want to over rev the engine too often).

Additionally I would advise not to saw at the wheel at the top of the wave as that can flick you over if you are attacking the wave at an angle or across the wave.

Hope this helps and it should cost very little!

Tiger
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Old 26 April 2003, 13:31   #17
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Forgot to mention that trimming in too much can cause an overpowered boat (a Phantom 18 with an XR2 200hp on the back) to constantly fall on the left - I know I raced as a navigator in one for far too long before I took up driving!

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When a boat looks that good who needs tubes!!!
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