Standard diesel for Bristol 29.9? - Page 2 - SailNet Community
Reply
 
LinkBack Thread Tools
post #11 of 20 Old 03-05-2014 Thread Starter
Load Bearing Member
 
CarbonSink62's Avatar
 
Join Date: Sep 2011
Location: Derry, NH
Posts: 598
Thanks: 7
Thanked 12 Times in 11 Posts
Rep Power: 4
 
Dock
Re: Standard diesel for Bristol 29.9?

Thanks, guys!

I didn't know that the A4 came in different hp ratings; everyone just says "Atomic 4" never "12hp Atomic 4". Then again my hearing is shot...

There were no pics of the engine in the listing, not a good sign.

Zen Again

1978 Bristol 29.9 #122

Testing a mother's love since 1962
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
CarbonSink62 is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #12 of 20 Old 03-05-2014
Barquito
 
Barquito's Avatar
 
Join Date: Dec 2007
Location: Madison, WI
Posts: 2,266
Thanks: 0
Thanked 27 Times in 27 Posts
Rep Power: 8
 
Re: Standard diesel for Bristol 29.9?

The A4 is just the A4. I think he was talking about the diesel replacements for the A4.

Bristol 27
Cirque
Barquito is offline  
Quote Quick Reply Share with Facebook
post #13 of 20 Old 03-05-2014
Old enough to know better
 
Join Date: Dec 2006
Location: Beacon, NY
Posts: 3,181
Thanks: 20
Thanked 129 Times in 125 Posts
Rep Power: 9
 
Re: Standard diesel for Bristol 29.9?

Quote:
Originally Posted by CarbonSink62 View Post
I'm looking at a Bristol 29.9 this Friday. The ad says it has a Yanmar YB12 single cylinder 10hp engine. The age is the same as the boat, so it must be original.

The Boat US review says these boats were made with an Atomic 4 at first, then a 15hp Yanmar, then a 16hp Universal.

Is it likely that the owner and broker are wrong?

I'll know in a few days, but I'm just curious if anyone can confirm the stock diesel in a 1977 B29.9 (I think it is the 2QM15, but I might be confused with another boat). I can't find a reference for a Yanmar YB12, only a YSM-8 & a YSM-12.

PS she does look like a nice boat!

It looks like a decent boat at a good price:

1977 Bristol 29.9 Sail Boat For Sale - www.yachtworld.com


...but a 10hp engine (even a diesel) isn't gonna move it very quickly.

Ken
Yes, diesel do put out more horse power at lower RPMs.

Quote:
Originally Posted by CarbonSink62 View Post
Thanks, guys!

I didn't know that the A4 came in different hp ratings; everyone just says "Atomic 4" never "12hp Atomic 4". Then again my hearing is shot...

There were no pics of the engine in the listing, not a good sign.
Well the A4 is "rated at 30 HP" but you have to rev it very high to get that. Most people seem to have them propped to have much lower RPM as the motor is happier at that range. Gas engines seem much happier at lower power output. The diesels need to have a "load" on them and are happiest at the max HP output so people prop them to be at the peak HP as that is max efficiency. So it is not an apples to apples comparison.

Last edited by miatapaul; 03-05-2014 at 12:08 PM.
miatapaul is online now  
Quote Quick Reply Share with Facebook
post #14 of 20 Old 04-27-2014
Junior Member
 
Join Date: Apr 2014
Location: Cape Cod
Posts: 1
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
Re: Standard diesel for Bristol 29.9?

So what did you think of that boat? How many horsepower did it actually have?
Pocasset Sailor is offline  
Quote Quick Reply Share with Facebook
post #15 of 20 Old 04-30-2014
Senior Member
 
JimsCAL's Avatar
 
Join Date: May 2007
Location: Glen Cove, NY
Posts: 2,884
Thanks: 2
Thanked 76 Times in 70 Posts
Rep Power: 9
 
Re: Standard diesel for Bristol 29.9?

I may be a little late to this party of be of help, but here's two comments.

My previous boat was a Cal 9.2 (30 foot) and the 11hp Universal 5411 pushed it just fine.

The issue with the Atomic 4 is that most are direct drive (no reduction in forward). This means a small fine pitched inefficient prop and the engine is never loaded up to anything close to the rated 30 hp. A 10 or 15 hp diesel with a 2/1 or higher reduction gear and larger prop will produce more thrust than the A4.
JimsCAL is offline  
Quote Quick Reply Share with Facebook
post #16 of 20 Old 04-30-2014 Thread Starter
Load Bearing Member
 
CarbonSink62's Avatar
 
Join Date: Sep 2011
Location: Derry, NH
Posts: 598
Thanks: 7
Thanked 12 Times in 11 Posts
Rep Power: 4
 
Dock
Re: Standard diesel for Bristol 29.9?

Quote:
Originally Posted by Pocasset Sailor View Post
So what did you think of that boat? How many horsepower did it actually have?
I can't find the picture I took, but it was a very small diesel; not the QM15 (which I had seen pics of before).

As much as I wanted to like it, the boat was just 'ok'.

The deck had been painted and was peeling everywhere.

The price to replace the original underpowered diesel was US$7,500 (15hp) or $9,800 (21hp) for just the engine. Add to that haul, store, install labor, and launch ($3k? $4k?); there was no way that it was happening.

I found another B29.9 in Tiverton, RI that we both like better; we close this Friday.

Zen Again

1978 Bristol 29.9 #122

Testing a mother's love since 1962
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
CarbonSink62 is offline  
Quote Quick Reply Share with Facebook
post #17 of 20 Old 05-26-2014
Junior Member
 
Join Date: Feb 2012
Location: Wagram, NC
Posts: 1
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
Re: Standard diesel for Bristol 29.9?

I have a 1978 29.9 #94 with a standard Yanmar 2QM15 raw water cooled. Pushes the boat to hull speed easily with some available "emergency power" using a three blade prop. As I understand it Bristol would equip the boat with what was available that the purchaser wanted at the time.
NewAdventure is offline  
Quote Quick Reply Share with Facebook
post #18 of 20 Old 05-26-2014
Member
 
Join Date: Apr 2010
Location: california
Posts: 58
Thanks: 2
Thanked 0 Times in 0 Posts
Rep Power: 6
 
Re: Standard diesel for Bristol 29.9?

I have the original 2QM15 in my 1980 Hunter 30 and it's still going strong. Grranted the boat spent its first 20 years in fresh water (great lakes). Aside from normal maintenance, I have repaired the fuel pump and replaced the mixing elbow.
jfurlong is offline  
Quote Quick Reply Share with Facebook
post #19 of 20 Old 06-01-2014
Junior Member
 
Join Date: Apr 2014
Posts: 1
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
Re: Standard diesel for Bristol 29.9?

Hopefully you've found the boat for you in Tiverton; the B 29.9 is a great boat and FWIW mine is an early 1979 and has a QM 20 which I assume was an original upgrade, RWC and seemingly in fine shape after a brief 35 years. I replaced the cracked exhaust mixer last year but otherwise the engine, other than being just a bit cranky to start in cool weather, is, uh, "Bristol". Good luck to you with your purchase.
John
vermontosea is offline  
Quote Quick Reply Share with Facebook
post #20 of 20 Old 06-23-2014
Junior Member
 
Join Date: Jun 2014
Location: Coast of Maine
Posts: 1
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
Re: Standard diesel for Bristol 29.9?

I may be late to the conversation, but for what it's worth: We're on our second season with a 1979 B 29.9 and we are thoroughly happy with the boat. We sail in Casco Bay in Maine. 'Velella' has the original Yanmar 2QM15, that you mentioned. This seems to be a good size for the boat. We easily motor at 5 knots, at about 2000 rpms.

But I don't think that 20hp would be too much in this boat. Based on that, and in light of the fact that Bristol later included a 20hp model, 10hp might feel 'light', especially if you will be sailing in areas with strong tides or currents.
I suggest test-steaming the boat under power to make sure that you will be comfortable poking along for hours in nasty conditions.
mbmaine is offline  
Quote Quick Reply Share with Facebook
Reply

Quick Reply
Message:
Options

By choosing to post the reply above you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

Register Now



In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.


User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
Rudder needed for Bristol 29/Bristol 30 JimHawkins Bristol 0 12-13-2013 01:54 PM
Diesel fuel lines -Universal 3cyl diesel argofred Diesel 8 04-18-2011 03:39 PM
Auto Diesel vs Marine Diesel / Addatives NewsReader Mass Bay Sailors 0 07-11-2007 06:15 PM
Ultra low sulphur diesel and the older marine diesel Valiente Gear & Maintenance 2 10-20-2006 12:10 PM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome