Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 27-05-2007, 14:43   #16
learningcurve
Guest

Posts: n/a
Quote:
Originally Posted by Alan Wheeler
The entire industry is subject to mix and match at sometime. It is expensive to design and build an engine. So if the market is not going to return that expense plus profit, it is easier to take someone elses existing engine to fit the market need. The volume of the order is so big though, that the company buying the product can ask for a custom build. So they will have small components fitted to match their own requirements. Colour is a simple spray gun, so it can be built to what ever colour anyone wants. In some instances, an engine will be built to the specs of the buyer, sometimes, the builders specs are used. Sometimes it is just a shortblock and the buyer then fits their own parts. Just depends. Also, just because one company buy's another, does not always mean they make soley those engines. Purchases can sometimes be financial investment only, sometimes we see a marriage in technology. Just depends.
Yep, I remember walking the boat shows and seeing the same small hp Westerbeke engine painted light blue and badged as a Detroit Diesel just a couple booths down.

I think that was the only difference.

Heck, VolvoPenta sold a marinized GM 350 engine up until a couple years ago.
__________________

__________________
  Reply With Quote
Old 27-05-2007, 15:28   #17
Registered User
 
NoTies's Avatar

Join Date: Nov 2005
Location: Vanuatu
Boat: Whiting 29' extended "Nightcap"
Posts: 1,378
Images: 2
I have only got anecdotal evidence of larger JDs in work boats so not sure if they're Yanmar derivatives or not. Have only heard 100% positive things about them. Cheap, rugged, reliable, easy to get parts for.
__________________

__________________
Pete

Positively, socially deviant.
NoTies is offline   Reply With Quote
Old 29-05-2007, 23:06   #18
Moderator
 
Boracay's Avatar

Cruisers Forum Supporter

Join Date: Feb 2004
Location: Pelican Bay, Great Sandy National Park
Boat: Steel Roberts Offshore 44
Posts: 5,175
Images: 18
Rigid mount...

The local John Deere marine agent has suggested that the engine be bolted directly to the bearers.

He says that with a big engine in a heavy steel boat this is the best way.

I did this when I built my Hartley RORC 32 but that was with a single cylinder 7hp Yanmar.

But no rubber engine mounts?
__________________
Rust never sleeps
Boracay Blog.
Boracay is offline   Reply With Quote
Old 29-05-2007, 23:30   #19
Senior Cruiser
 
delmarrey's Avatar

Cruisers Forum Supporter

Join Date: Mar 2003
Location: Now in Blaine, WA
Boat: Modified Choate 40
Posts: 10,702
Images: 122
Quote:
Originally Posted by Boracay
The local John Deere marine agent has suggested that the engine be bolted directly to the bearers.


But no rubber engine mounts?
I'd be inspecting the mountings quite often if it were installed without rubber mounts. And I'd only be using a grade 5 bolt!
I have many story's to tell about broken off mounting bolts in hard-to get-to places...................._/)
__________________
delmarrey is offline   Reply With Quote
Old 29-05-2007, 23:45   #20
Registered User
 
cat man do's Avatar

Join Date: Aug 2006
Location: Brisbane Australia [until the boats launched]
Boat: 50ft powercat, light,long and low powered
Posts: 4,409
Images: 36
Del, while on the subject of bolt's, [I take it you know more than me on the subject] it was suggested to me to bolt my 300kg Cummins down [ on flexible mount's] with just cad plated steel bolt's with a smear of "Never Seize" on them.

Would that be right, I was thinking Locktite instead of never seize an maybe SS bolt's, though fatigue may be a factor there.

Dave
__________________
"Money can't buy you happiness but it can buy you a yacht large enough to pull up right alongside it"...............David Lee Roth
Long Distance Motorboat Cruising It Is Possible on a Small Budget
cat man do is offline   Reply With Quote
Old 30-05-2007, 02:42   #21
Moderator Emeritus
 
GordMay's Avatar

Join Date: Mar 2003
Location: Thunder Bay, Ontario - 48-29N x 89-20W
Boat: (Cruiser Living On Dirt)
Posts: 31,576
Images: 240
Metric (ISO) class 8.8, though slightly stronger, are generally considered a rough equivalent for US (SAE) grade 5 bolts.

Property class 6.8 roughly corresponds to SAE grade 2;
8.8 to SAE 5
;
and 10.9 to SAE 8.

Bolt Class ~ Proof Load ~ Min. Yield Strength ~ Min. Tensile Strength
US (SAE) ~ 85,000 psi ~ 92,000 psi ~ 120,000 psi
Metric (ISO) Class 8.8 ~ 600 MPa ~ 660 MPa ~ 830

Tensile Strength: The maximum load in tension (pulling apart) which a material can withstand before breaking or fracturing.

Yield Strength: The maximum load at which a material exhibits a specific permanent deformation

Proof Load: An axial tensile load which the product must withstand without evidence of any permanent set.
1 Mpa = 145.0377 psi

Metric (ISO) fasteners are marked with the numerical grade designation (ie: 8.8).
US (ISO) fastener grades are indicated by radial lines (ie: Grade 5 = 3 lines)
Attached Images
 
__________________
Gord May
"If you didn't have the time or money to do it right in the first place, when will you get the time/$ to fix it?"



GordMay is online now   Reply With Quote
Old 30-05-2007, 14:00   #22
Senior Cruiser
 
Alan Wheeler's Avatar

Cruisers Forum Supporter

Join Date: Dec 2003
Location: Marlborough Sounds. New Zealand
Boat: Hartley Tahitian 45ft. Leisure Lady
Posts: 8,038
Images: 102
I would NEVER bolt directly to the engien bearer. Especially on a steel boat. The noise and vibration would drive you nuts.
NEVER use SST bolts. They will eventually crack. Cadnium/zinc plated will be fine. Was the person suggesting you use never sieze over the bolt to protect it instead of one the thread maybe? Locktite would be a good call IMO.
Marine engine mounts are expensive but well worth it. They are captivated so as the engine can not tear away if the boat goes through a severe roll.
__________________
Wheels

For God so loved the world..........He didn't send a committee.
Alan Wheeler is offline   Reply With Quote
Old 30-05-2007, 14:17   #23
Senior Cruiser
 
DeepFrz's Avatar

Cruisers Forum Supporter

Join Date: Mar 2006
Location: Winnipeg
Boat: None at this time
Posts: 7,930
Instead of locktite, you might want to try these new(?) lock washers, called Nord-lock. Then you could use anti-sieze compound as well on the threads.

Nord-Lock - Home
__________________
The Blue Dot Campaign. This Changes Everything.
DeepFrz is offline   Reply With Quote
Old 30-05-2007, 18:23   #24
Registered User
 
cat man do's Avatar

Join Date: Aug 2006
Location: Brisbane Australia [until the boats launched]
Boat: 50ft powercat, light,long and low powered
Posts: 4,409
Images: 36
Quote:
Originally Posted by Alan Wheeler
I would NEVER bolt directly to the engien bearer. Especially on a steel boat. The noise and vibration would drive you nuts.
NEVER use SST bolts. They will eventually crack. Cadnium/zinc plated will be fine. Was the person suggesting you use never sieze over the bolt to protect it instead of one the thread maybe? Locktite would be a good call IMO.
Marine engine mounts are expensive but well worth it. They are captivated so as the engine can not tear away if the boat goes through a severe roll.
Thought the stainless would crap out, and yep, maybe they were suggesting neversieze to stop the cad plated ones rusting.

Locktite was a given, don't go to sea without it in the kit.

Thank's

Dave
__________________

__________________
"Money can't buy you happiness but it can buy you a yacht large enough to pull up right alongside it"...............David Lee Roth
Long Distance Motorboat Cruising It Is Possible on a Small Budget
cat man do is offline   Reply With Quote
Reply

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not 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 Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 05:49.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.