Thanks for your response. The 33-2s came with a yanmar 2GM20F. Best of luck 
with your repower.
Sent from Yahoo Mail on Android 
 
  On Wed, Aug 17, 2016 at 12:57 PM, David Kaseler via 
CnC-List<cnc-list@cnc-list.com> wrote:   We too have a 1975 33 with an Atomic 
4. What is your hull number? We cruise at 1800 RPMs and get about 6 knots. We 
are in the process of replacing our engine with a rebuilt  from Moyer Marine. 
If you are not familiar with Moyer Marine you should be. They are the authority 
on all things Atomic 4. They even manufacture C&C style engine mounts which 
seem to match the original specks.Dave.

Sent from my iPad
On Aug 17, 2016, at 8:00 AM, Free Girls Sailing via CnC-List 
<cnc-list@cnc-list.com> wrote:


We have an Atomic 4 in our 33 Mark 1 and top speed is around 6.5 knots. 
Jessica 1975 C&C 33 Mark 1

On Wednesday, August 17, 2016, doug.welch--- via CnC-List 
<cnc-list@cnc-list.com> wrote:

I am getting 5.5 kn @2,800 in flat water. I have a 2 blade variprofile 
feathering prop. 


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