[Alberg30] Re: Yanmar 2GM20 props

[Neal Jackson]

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.


----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

---------------------------
Ehen I switched Isa Lei #240 to the Yanmar, I used a 13x13 3 blade.  It has 
done a wonderful job for the past 5 years.  Plenty of speed under power, 
plenty of power to pull some one off a sand bar.

Jim Davis
S/V Isa Lei
CT 35
----------------------------
Faerthen,

I have done research on the Yanmar 2GM20F (13HP) and found the optimal prop
is a sail pitch 13X13. This prop handles river currents and a good sea with
winds.

Stephen
#114
Carina Vela



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