[Alberg30] Re: Yammer 20 props

[sousa, stephen]

I am running a 13 pitch with a sail prop vs. a machine prop (mickey mouse
ears) on a 2GM20F (13HP). What version of Yanmar is installed in the Alberg?
If I were to repower today I would use the 3GM series 3 cylinder, the weight
isn't that much greater but would provide a margin of horsepower.

Stephen
#114 

-----Original Message-----
From: Nicholl Engineering Services Ltd [mailto:nesnz at xtra.co.nz]
Sent: Thursday, March 14, 2002 4:00 AM
To: public-list at alberg30.org
Subject: RE: [Alberg30] Re: Yammer 20 props


I would be interested in knowing the pitch.  We have had a Yanmar and
were/are unable to get 6's+  with it,

SV Chipper - Victoria BC
nknow in Bay of Islands - New Zealand (since 1990)

-----Original Message-----
From: public-list-admin at alberg30.org
[mailto:public-list-admin at alberg30.org]On Behalf Of Faerthen Felix
Sent: Thursday, 14 March 2002 14:49
To: public-list at alberg30.org
Subject: [Alberg30] Re: Yanmar 20 props


Thanks for the info--sounds like 3 blades is a good way to go! It seems like
this propeller discussion would make a good page for the wiki-wiki...

FF
#237
Nisus
----------------------------------
I have the 2GMF Yanmar engine (already on the boat when I installed it in
1993) and a 13 inch three-blade prop (don't know the pitch) and it will kick
me along at 6-7 knots in a calm, and nearly as well with a moderate breeze
in your face.

I do not race the boat, but there is no noticeable noise or vibration while
under sail.  The only negative is that the Yanmar is not the most quiet
engine when it is operating (though the noise under way is definitely
tolerable).  But she has never had the wrench on her, at least since I have
had the boat.

Neal Jackson
PEREGRINE
No. 486

-----Original Message-----
From: Mike Lehman [mailto:sail_505 at hotmail.com]
Sent: Monday, March 11, 2002 11:02 AM
To: public-list at alberg30.org
Subject: Re: [Alberg30] Re: Yanmar 2GM20 props


I have a three bladed prop and do not notice any difference, in fact I took
3rd out of 10, in the Miles River race two years ago. My die-hard racing
friends would never consider a 3-blade prop because of the drag, but I think

you can make that up with luck.
---------------------------------------
>Message: 2
>From: "sousa, stephen" <sousa_stephen at emc.com>
>To: "'public-list at alberg30.org'" <public-list at alberg30.org>
>Subject: RE: [Alberg30] Re: Yanmar 2GM20 props
>Date: Sun, 10 Mar 2002 18:26:21 -0500
>Reply-To: public-list at alberg30.org
>
>I do not get any noise or oscillation. With the Yanmar, they recommend that
>the transmission is placed in reverse under sail, otherwise you will damage
>the transmission.
>
>Stephen
>#114
-------------------------------------------
>----Original Message Follows----
>From: "Faerthen Felix" <ffelix at lycos.com>
>Reply-To: public-list at alberg30.org
>To: public-list at alberg30.org
>Subject: [Alberg30] Re: Yanmar 2GM20 props
>Date: Sun, 10 Mar 2002 16:04:45 -0700
>
>Thanks for the help! This is a great list!
>
>Do you get a lot of noise or vibration while under sail with a 3-blade prop
>dragging through the water?
>
>FF
>#237
>Nisus
>



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