[Alberg30] Prop selection

[Tom Sutherland]

Thanks Mike! 

Are you pleased with the performance of this prop? 

I have recently installed a new three cylinder kubota diesel. The engine
is supposed to produce 25hp at 3000 rps. It has a Hurth transmission
with a reduction of 1.79 in forward and  1.85 in reverse. I am still
turning my old prop which is a 12X6 2 blade. It is a right handed prop
however and the new set-up calls for a left handed prop. I thought I
could get by with just reversing the transmission linkage (forward is
reverse and reverse is forward) until I had a chance to see how the 12x6
prop would perform and maybe help me determine what I should order.

I have been given mixed reports as to what effect this might have on my
transmission so I am a bit uneasy as to how long I should run this way.
It actually seems to perform pretty well. 

I am however leaning toward a three bladed prop.

As I understand things you are pretty much stuck with any new prop once
you buy the thing. Not like you can send it back and try something else.
So I am a bit anxious about what prop I should order.... Maybe I should
contact "Michigan Wheel" and see if they can make a recommendation. 

Any comments or suggestions would be appreciated. 

(I invite one and all to comment)

Tom S
A-30  #412


Mike Lehman wrote:
> 
> If I remember correctly, the prop is a 12x10 3 blade. I had it sized for the
> design and weight of the boat taking into cosideration the power curve of
> the engine and cruising rpms. Michigan Wheel, Inc. did the calculations and
> I bought the prop at Miller's Island in Baltimore.
> 
> Mike Lehman
> "Gilleleje" #505
> 
> ----Original Message Follows----
> From: Tom Sutherland <sutherlandt at prodigy.net>
> Reply-To: sutherlandt at prodigy.net,   Alberg 30 public
> list<public-list at alberg30.org>
> To: Alberg 30 public list <public-list at alberg30.org>
> Subject: Re: [Alberg30] Re: Public-list Digest, Vol 169, Issue 7
> Date: Tue, 18 Nov 2003 20:33:47 -0500
> 
> Mike,
> 
> What prop do you turn with this engine? I am sure you have said but I do
> not recall.
> 
> Tom S
> 
> Mike Lehman wrote:
>  >
>  > I have a 4cly 30HP Universal that I installed myself in #505. It's more
>  > power than you need.
>  >
>  > Mike Lehman
>  > "Gilleleje" #505
> 
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