[C320-list] Boat Speed

[Sail0983 at aol.com]

Paul
 
There are so many variables to consider:
1. Is the through the water or over the ground speed?
2. Are you going with or against the current?
3. How clean is the bottom of the boat and is the prop fouled with  growth.
4. Have you checked the accuracy of your tach?
5. How loaded is your boat. Full water and fuel tanks.
 
I have the same configuration as you and at slack water at 2800 RPM I am  
running about 6 knots. If I push the to 3200-3300 I can get 7 - 7.1 knots. 
These  are over the ground speeds as calculated by the GPS.
 
Dave Marchant
Illumination #983
 
 
In a message dated 7/6/2009 5:39:27 P.M. Eastern Daylight Time,  
pjaarch at verizon.net writes:


I  just purchased my 320 several weeks ago and am concerned about the boat 
speed  while under power.  I have a 3GM30F and cruise at about 5.4 knots at  
2700RPMs.  It seems slow to me.  I am currently cruising with other  boats, 
a (hunter 28, beneteau 331, and an Irwin 38.)  They all cruise  easily 6 
knots at 2700 RPMs and I can't keep up.  I have a 3 blade  prop.  Could I be 
under proped?  What is the cruising RPMs for the  boat?  I have no ID plate 
on the engine block.  I assume it is rated  for 3400.

Paul Adison
C320 #722
"Rough  Draft"

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