cruising speed beneteau 40 - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > Boat Builders Row > Beneteau
 Not a Member? 


Reply
 
LinkBack Thread Tools
  #1  
Old 08-19-2008
Junior Member
 
Join Date: Aug 2008
Posts: 1
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
ronikokernoot is on a distinguished road
cruising speed beneteau 40

Hi I am going to buy a Beneteau 40 from 1996 with a Yanmar engine.
The boat has been in the water for more then a year.It has a lot of Barnacles
also on the prop.While sailing it got to 3000 rpm and a speed of 5.5 knots to 6 knots.
What should be my maximum speed and my cruising speed?
Should a 12 year old engine perform like a new one and what is the life expectancy of this sort of engine?

All advice is appreciated.

Roni
Reply With Quote Share with Facebook
  #2  
Old 08-19-2008
Zanshin's Avatar
Senior Member
 
Join Date: Aug 2006
Location: Germany
Posts: 2,165
Thanks: 0
Thanked 14 Times in 14 Posts
Rep Power: 8
Zanshin is on a distinguished road
The LWL of the Beneteau 40 is 33 11/12 feet, so your hull speed is 7.8 knots.

You are probably getting a lot of drag off the hull and perhaps even cavitation from the prop. You should be getting more RPM and speed from the engine but that could be due to the dirty hull. More importantly, clean and smooth the prop.
__________________

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Share with Facebook
  #3  
Old 08-29-2008
Senior Member
 
Join Date: Apr 2008
Posts: 476
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 7
negrini is on a distinguished road
Send a message via AIM to negrini Send a message via Yahoo to negrini Send a message via Skype™ to negrini
Regarding performance, Zanshin is correct ! Age has minimal effect to the engine, specially these reliables Yanmars. Hours, of usage gives you some reference, but MAINTENANCE is the key here. Properly maintened, these engines goes well beyond 10,000 hours of service. A visual inspection will revel PO care on boat, including engine, but have it surveyed for a consistent check.
__________________
Nave Rara
Beneteau Oceanis 43
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Share with Facebook
  #4  
Old 08-29-2008
hellosailor's Avatar
Plausible Deniability
 
Join Date: Apr 2006
Posts: 10,546
Thanks: 2
Thanked 82 Times in 80 Posts
Rep Power: 10
hellosailor has a spectacular aura about hellosailor has a spectacular aura about
Roni, with enough growth of the prop, even if the hull is clean you can reach full throttle and have zero forward speed. On pretty much any boat.

If you have growth ("a good beard") on the hull and some on the prop, hitting 6 knots would be quite good actually. It can easily cut 1-2 knots off the speed of a boat.

Engine life and performance is a whole realm of "maybe". A good diesel, properly maintained and operated, should get 5,000-10,000 hours on it before it needs an overhaul. Not years--but hours of operation. If it is abused, the cylinders can get carbon deposits, the injectors can be ruined, and acid and sludge in the oil can ruin bearings while the cylinder walls and rings have rusted--all in the span of two or three years with near-zero use and zero maintenance.

Some maintenance is seasonal (before/after layup) while other things are base don hours of run time. If the boat doesn't have an hour meter ("Hobbs" meter) that tracks the hours the engine is actually running, they are not hard to add, and they give you a real count instead of guessing.

There's really no way to be sure, except to have a diesel mechanic take a look at it. He can pull the injectors, look inside the cylinders with a borescope (without remoing the head), test and if necessary overhaul the injectors, run an oil sample analysis, and give you specific answers about how healthy the engine is. That's probably going to cost you $300 or so, unless he hits the key and says "Gee, sounds perfect!" and tells you to skip the rest.

If you are unfamiliar with the engine, and diesels in general, it can pay to simply get a referall for a GOOD mechanic (which isn't always easy) and then have him come out for a couple of hours to inspect the engine AND to show you what has to be done to keep it running properly, how to bleed the fuel system, and so on. A much better investment than a tow or AAA membership.<G>
Reply With Quote Share with Facebook
  #5  
Old 08-29-2008
sailortjk1's Avatar
Senior Member
 
Join Date: Dec 2005
Location: Porter, IN
Posts: 4,647
Thanks: 1
Thanked 1 Time in 1 Post
Rep Power: 10
sailortjk1 has a spectacular aura about sailortjk1 has a spectacular aura about
Quote:
Originally Posted by hellosailor View Post
Roni, with enough growth of the prop, even if the hull is clean you can reach full throttle and have zero forward speed. On pretty much any boat.

If you have growth ("a good beard") on the hull and some on the prop, hitting 6 knots would be quite good actually. It can easily cut 1-2 knots off the speed of a boat.
Its amazing how much just a little growth can slow you down, Just like HS said. Even a small bit of seeweed on your prop will significantly alter the proformance of your boat.
__________________
Courtney is My Hero

If a man is to be obsessed by something, I suppose a boat is as good as anything, perhaps a bit better than most - E.B. White
Reply With Quote Share with Facebook
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Cruising the Big Apple Sue & Larry Cruising Articles 0 09-09-2004 08:00 PM
Women and Cruising Sue & Larry Cruising Articles 0 05-24-2004 08:00 PM
Criteria for Successful Cruising Liza Copeland Her Sailnet Articles 0 08-27-2003 08:00 PM
Calculating the Cost of Cruising Paul & Sheryl Shard Her Sailnet Articles 0 04-03-2003 07:00 PM


All times are GMT -4. The time now is 05:11 PM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012

The SailNet.com store is owned and operated by a company independent of the SailNet.com forum. You are now leaving the SailNet forum. Click OK to continue or Cancel to return to the SailNet forum.