Cruisers Forum
 


Reply
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 13-02-2020, 13:07   #16
Registered User
 
MartinR's Avatar

Join Date: Feb 2015
Location: Sweden
Boat: 73´ULDB custom ketch
Posts: 1,040
Re: Volvo Penta D1-30 Rubber Cushions - any alternative ?

Quote:
Originally Posted by Suliwar View Post
3) the softer the better.
A slight disagreement on this point. Ideally, yes, but. This is depending on the shaft configuration. If the engine transfers the thrust from the propeller to the boat through the vibration dampers, they need to be harder then they would be if you have a flexible coupling and thrust bearing.

.
MartinR is offline   Reply With Quote
Old 13-02-2020, 14:31   #17
Registered User

Join Date: Apr 2015
Location: Ladner, Delta, British Columbia Canada.
Boat: Coast 30
Posts: 374
Re: Volvo Penta D1-30 Rubber Cushions - any alternative ?

simplest answer....


R&D Marine Ltd.
Meadow Works
Clothall Road
Baldock
Herts
SG7 6PD
England
Telephone: +44 (0)1462 892391 Fax: +44 (0)1462 896448
coastalexplorer is offline   Reply With Quote
Old 13-02-2020, 15:36   #18
Registered User
 
Cadence's Avatar

Join Date: Dec 2008
Location: SC
Boat: None,build the one shown of glass, had many from 6' to 48'.
Posts: 9,703
Re: Volvo Penta D1-30 Rubber Cushions - any alternative ?

Quote:
Originally Posted by MartinR View Post
A slight disagreement on this point. Ideally, yes, but. This is depending on the shaft configuration. If the engine transfers the thrust from the propeller to the boat through the vibration dampers, they need to be harder then they would be if you have a flexible coupling and thrust bearing.

.
Something about 90 durometer will absorb vibration but maintain alignment.
Cadence is offline   Reply With Quote
Old 13-02-2020, 15:55   #19
Registered User

Join Date: Oct 2015
Posts: 2,008
Re: Volvo Penta D1-30 Rubber Cushions - any alternative ?

Hey Guys...

You don't have to use exactly the same part as the original manufacturer, but marine engine mounts are NOT functionally the same as ones for automobiles. It's not just a price difference based on market.

In a car, there is NO thrust load at all. The engine mounts just have to absorb vibration. On a boat, ALL of the load of the propeller pushing the boat forward--and backward--is transmitted up the prop shaft, through the engine, through the mounts, to the hull. The loads they see are completely different than with a road engine. That's why they are rated based on the engine's weight and horsepower.

The idea that you can homebrew one of these and have it properly tuned to the the engine's weight and thrust load is pretty naive of the actual engineering involved.

All of the above assumes you have a standard prop shaft configuration. There are systems where the propulsion thrust load is carried other ways, but they aren't nearly as common.
billknny is offline   Reply With Quote
Old 13-02-2020, 16:31   #20
Registered User
 
Cadence's Avatar

Join Date: Dec 2008
Location: SC
Boat: None,build the one shown of glass, had many from 6' to 48'.
Posts: 9,703
Re: Volvo Penta D1-30 Rubber Cushions - any alternative ?

Quote:
Originally Posted by billknny View Post
Hey Guys...

You don't have to use exactly the same part as the original manufacturer, but marine engine mounts are NOT functionally the same as ones for automobiles. It's not just a price difference based on market.

In a car, there is NO thrust load at all. The engine mounts just have to absorb vibration. On a boat, ALL of the load of the propeller pushing the boat forward--and backward--is transmitted up the prop shaft, through the engine, through the mounts, to the hull. The loads they see are completely different than with a road engine. That's why they are rated based on the engine's weight and horsepower.

The idea that you can homebrew one of these and have it properly tuned to the the engine's weight and thrust load is pretty naive of the actual engineering involved.

All of the above assumes you have a standard prop shaft configuration. There are systems where the propulsion thrust load is carried other ways, but they aren't nearly as common.
My "Old Man" mounted a couple of 671s with crash boxes on Lord mounts that where used for shock mounts for delivery of machines of the co. I worked for. Worked great. I wish I had pics of the mounts with adjustments up and down and side to side. Six per engine and Twin Disc. Some times there id more than one way to skin a cat.
Cadence is offline   Reply With Quote
Old 14-02-2020, 03:15   #21
Registered User

Join Date: Feb 2010
Location: Australia
Posts: 836
Re: Volvo Penta D1-30 Rubber Cushions - any alternative ?

Here’s a plan. Look up “perkins Perama” at Parts4engines in UK. The Perama is the same base engine as the VP 2030. The mounts are £15-20 each on the website.
skipperpete is offline   Reply With Quote
Old 14-02-2020, 06:44   #22
Registered User

Join Date: Jul 2016
Location: Traverse City, Michigan
Boat: Hinterhoeller Niagara 35
Posts: 218
Re: Volvo Penta D1-30 Rubber Cushions - any alternative ?

This outfit will make new mounts using the metal parts from your old ones.

[URL="http://www.then-now-auto.com/"]
Boatwright is offline   Reply With Quote
Old 14-02-2020, 07:52   #23
Registered User

Join Date: Nov 2014
Posts: 1,314
Re: Volvo Penta D1-30 Rubber Cushions - any alternative ?

Quote:
Originally Posted by skipperpete View Post
Here’s a plan. Look up “perkins Perama” at Parts4engines in UK. The Perama is the same base engine as the VP 2030. The mounts are £15-20 each on the website.
Yes, it's a plan, but it might be problematic......

When V.P. sold the MD 2010,2020,2030, and 2040 line of marineized ISM (Perkins) engines, the flex mounts that they used were sourced from Metalastic. These are the mounts with the inverted gold colored cover. Widely used by many engine companies.

When they moved to the more recent D1-13,20,30 and D2-40,50,55,60,75 they continued to use these mounts. However, it was found that the D1-20 and D1-30 engines, even though similar to the 2020 and 2030, didn't work well with the Metalastic mounts. Lots of vibration complaints, and VP switched to the cast aluminum mounts that are still used today. Don't recall who makes the current mounts.

DougR
DougR is offline   Reply With Quote
Old 14-02-2020, 09:49   #24
Registered User

Join Date: Jul 2017
Posts: 110
Re: Volvo Penta D1-30 Rubber Cushions - any alternative ?

DougR, any idea when VP switched to the cast aluminum mounts? On 6-year-old D1-30F we have Trelleborg Metalastik Cushyfloat https://www.trelleborg.com/en/anti-v...product--range
Username25 is offline   Reply With Quote
Old 14-02-2020, 10:48   #25
Registered User

Join Date: Nov 2014
Posts: 1,314
Re: Volvo Penta D1-30 Rubber Cushions - any alternative ?

This change from Metalastik mounts to cast aluminum mounts took place very early on the production life of the D1-30 inboard engine, and was still in place when I left the company in 2011. That said, there have been some changes since that time:
- saildrive engines- some parts sources show Metalastik mounts on the front of saildrive packages, other sources show the aluminum mounts....

- inboard engine- sources show the cast aluminum mounts at all four corners, but there appears to be an additional option of a three mount solution, with a single cast aluminum mount centrally located in the front.

I have reached out to former colleagues for clarification and will report back if I find out anything of significance.
DougR is offline   Reply With Quote
Old 28-02-2020, 07:58   #26
Registered User

Join Date: Nov 2014
Posts: 1,314
Re: Volvo Penta D1-30 Rubber Cushions - any alternative ?

Quote:
Originally Posted by Username25 View Post
DougR, any idea when VP switched to the cast aluminum mounts? On 6-year-old D1-30F we have Trelleborg Metalastik Cushyfloat https://www.trelleborg.com/en/anti-v...product--range

The change from the Metalastik to the cast aluminum mount took place in late 2006 /2007 time frame. This was for the inboard version of the engine, and this remains the standard package today.
Then in 2012 the threepoint mount configuration became available, two in the rear and one in the front. Cast aluminum isolators. There seems to be little information readily available for the three point configuration, and that leads me to believe that this was developed for a particular boat builder who had some sort of unusual requirements.

As far as I can tell the Metalastik mounts are still used at the front of the engine on saildrive packages. Probably the combination of a single soft mount at the saildrive end in combination with two Metalastik isolators provides good vibration control.

DougR
DougR is offline   Reply With Quote
Old 27-05-2020, 20:33   #27
Registered User

Join Date: Mar 2018
Location: Victoria, BC, Canada
Boat: Ranger Tug R21EC
Posts: 28
Re: Volvo Penta D1-30 Rubber Cushions - any alternative ?

I have a 2014 Ranger Tug with the D1-30. It has the cast aluminum style mounts. I replaced them around the 1400hr mark due to cracking in the rubber in all 4 mounts. No complete failures on any of the 4 but cracking of varying degrees. I have about 600hrs on the new ones I installed and its already showing signs of cracking and fatigue. I was considering another style but was afraid to change in fear of causing higher vibration in either the engine or through the hull. Would love to try something different on my next set.

Note: the majority of my hours are at trolling speed so basically idling, which is when the engine vibrates the most.
Newf1 is offline   Reply With Quote
Old 28-05-2020, 04:11   #28
Registered User

Join Date: Oct 2019
Posts: 11
Re: Volvo Penta D1-30 Rubber Cushions - any alternative ?

Finally I bought the Vetus model Kstuv50 , but not yet tried. When I have my impressions I will post here.
First sight is quite soft...
Photos with old and newClick image for larger version

Name:	1590664224248.jpeg
Views:	68
Size:	102.2 KB
ID:	215955Click image for larger version

Name:	1590664251427.jpeg
Views:	79
Size:	95.2 KB
ID:	215956
kostasc is offline   Reply With Quote
Old 21-06-2020, 10:59   #29
Registered User

Join Date: Jun 2020
Posts: 2
Re: Volvo Penta D1-30 Rubber Cushions - any alternative ?

Quote:
Originally Posted by Username25 View Post
DougR, any idea when VP switched to the cast aluminum mounts? On 6-year-old D1-30F we have Trelleborg Metalastik Cushyfloat https://www.trelleborg.com/en/anti-v...product--range
Hi Username25, I have a D1-30F. Which Metalistik Cushyfloat model number do you have?
wotdoino is offline   Reply With Quote
Old 21-06-2020, 11:01   #30
Registered User

Join Date: Jun 2020
Posts: 2
Re: Volvo Penta D1-30 Rubber Cushions - any alternative ?

Quote:
Originally Posted by kostasc View Post
Finally I bought the Vetus model Kstuv50 , but not yet tried. When I have my impressions I will post here.
First sight is quite soft...
Photos with old and newAttachment 215955Attachment 215956
Hi Kostasc, have you been able to give the Vetus a try yet? Also, how easy were they to fit?
wotdoino is offline   Reply With Quote
Reply

Tags
cushions, grass, penta, volvo

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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


Similar Threads
Thread Thread Starter Forum Replies Last Post
General Info: Volvo Penta D2-40 Alternative Parts oranaman Fountaine Pajot 1 12-03-2017 15:33
Volvo Penta D2-40 Alternative Parts oranaman Engines and Propulsion Systems 0 08-03-2017 21:42
Alternative to Volvo Penta sealant compound 840879 Magnum Engines and Propulsion Systems 4 11-03-2015 15:04
Volvo Penta md2020 air filter alternative sthurley Engines and Propulsion Systems 3 08-05-2014 14:56

Advertise Here


All times are GMT -7. The time now is 07:57.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2021, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2021, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.