[Public-list] Props and prop shafts

[J Bergquist]

Funny I had exactly the opposite experience. My dealer talked me OUT of the
20 hp model in favor of the 16 hp because he said that with a 2 blade prop
there was no way I would be able to put 20 hp in the water and that most
people overpower their boats. Truth be told he said I could probably use the
13.5 hp model and be just fine. He said he had plenty of very happy
customers with that motor in boats similar to mine. Since I haven't been in
the situation of running against a 7 knot current and head sea yet, I don't
know whether I will have trouble with that, but 7 knots is more than hull
speed for our boats, so I'm not sure I understand how you managed to go
through the water at much more than that without a LOT more than 20 hp...

It doesn't matter how much power you have between your bilge boards. It only
matters how much you can put in the water. Spending extra $$$ on horsepower
that you can't put into the water is a waste. That's just my opinion.

I have a 13x8 2 blade prop and a 2 cylinder 16 hp beta. Vibration is not a
problem. It's quieter than my A4. It's a great, compact little motor.

I also don't see why you would change shaft diameter. that seems like a big
and needless pain in the butt to me. 7/8 shaft is plenty big, I think,
especially if you use stainless instead of bronze.

J

On 7/18/06, FINNUS505 at aol.com <FINNUS505 at aol.com> wrote:
>
>
> In a message dated 7/17/2006 4:46:45 PM Eastern Standard Time,
> whittle at shaw.ca writes:
>
> Dear  Lee,
> Comments:
> 1. I,also, was attracted to the 16 HP Sole version.  The
> dealer/engineer talked me out of it for the reason that the boat will  do
> fine with the smaller Horsepower until you run into adverse
> conditions  and
> then you will possibly regret not having ponied up for the extra  reserve
> which is there just when you need it. Cost was my initial  influence, of
> course, but I got over it! I do not regret one bit the extra  horsepower.
> We
> hit Dodd Narrows an hour early and needed every ounce of  energy to combat
> a
> 6 or 7 knot current and get through, which we did with  some in reserve as
> it
> turned out. I don't think the smaller engine would  have made it.
> Secondly,
> three cylinders are better than two from a  vibration standpoint.
> 2. I went with a  two blade wide blade and it works just fine. I
> don't care about reversing  issues since I have basically given up any
> reliance on being able to  predict the behaviour of my boat and have found
> other ways of landing  safely at and leaving the dock.
> 3. Why  would you change the shaft size?
> 4. I  have no knowledge about plastic props.
> Regards  Jonathan
> ----- Original Message -----
>
>
>
> thx, Jonathan :)
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