[Public-List] Urgent Prop Question for Yanmar 2GMF20 repowered A30

[Bill Woodford via Public-List]

Paul,

If you want to start a fight in this group, asking what prop size is
appropriate for an Alberg may just be the way.

I have a Yanmar 2gm20 and I sometimes race.  My crew demands we have a two
blade prop so currently I have a 13x9 RH on my boat.  It is not the
greatest but it is way better than my old 13x7, I probably go .5 knot
slower than others under power.  Laughing Gull has a two blade 13x12 which
seems to work well.  If you decide to go with a two blade, I would
recommend the 13x12.

The last three blade I had on mine was the "Chesapeake 3"  It was a 12 x
14.  It came with glowing recommendations and I was less than impressed.
In fact, my two blade 13 x9 was better than my Chesapeake 3.

I think Yanmar recommends something like a 15 x10.  However, 15 will not
fit on our boats because of the clearance issue with the rudder.  My
recollection is 13 is the biggest we can go.

I hope it helps.  I wish you the best and if I can be of any additional
assistance, please do not hesitate to contact me.

Thanks,

Woody
Latika
US 11

On Mon, Aug 21, 2017 at 3:35 PM, Paul via Public-List <
public-list at lists.alberg30.org> wrote:

>    Hi,
>
>    It's been a while but I love knowing you guys are here for when I'm in
>    need :-)
>
>    My prop fell off, don't ask why. Long and painful story. However my
>    boat went on the hard this morning which confirmed it is gone (was
>    hoping for a sheared prop shaft) so I need a new one in a hurry but the
>    boat yard is asking me what prop it needs and I have no idea. I'm
>    pretty sure the transmission was Japanese too and has a 2:1 ration but
>    I'm not sure.
>
>    The previous owners followed the A30 Owners manual to the letter for
>    the head convesion so assuming they did the same when repowering.
>
>    To be clear, I'm a cruiser, not a racer. It was a fixed 3 blade and I'd
>    like to stay the same.
>
>    Can anyone help?
>
>    Thanks in advance, you guys and girls are the best!
>
>    Paul.
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William Woodford,Esq.

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