Whaler Central - Boston Whaler Boat Information and Photos

Posted by Joe Kriz on 03/16/10 - 4:33 PM

As near as I can gather, here are the correct O-ring part numbers.
http://www.whalercentral.com/photogal...p;rstart=0

Correct part numbers for O-rings
O-ring for 1 inch tubes = 9557K482 (dash 213) ($4.59 pack of 50)
O-ring for 1 1/4 inch tubes = #9557K486 (dash 217) ($4.97 pack of 50)

I have corrected the part numbers in the article also.
If anyone can tell us differently, please let us know here.

Edited by Joe Kriz on 03/17/10 - 1:57 PM

Posted by Tom W Clark on 03/16/10 - 5:55 PM

There is more than one "correct" part number.

The O-rings I use from McMaster-Carr are #9561K48 which are Dash Number 213 O-rings made of EPDM.

The O-rings Kamie has come up with are Dash Number 214 EPDM.

The "Dash number" refers to the physical size of the O-ring. The diameter difference between these two sizes is 3/64", a tiny difference. Either will work but I like the slightly snugger fit of the Dash 213 which means less chance of herniating the O-ring during flaring.

The same size of O-ring is made in many different materials. Whaler used Neoprene. I was the one who stared using EPDM because it seemed they might be a wee bit more durable in this application.

Posted by wellcraft on 03/16/10 - 7:51 PM

I just placed an order on the o-rings you recommend.

Thank you.

Tom W Clark wrote:
There is more than one "correct" part number.

The O-rings I use from McMaster-Carr are #9561K48 which are Dash Number 213 O-rings made of EPDM.

The O-rings Kamie has come up with are Dash Number 214 EPDM.

The "Dash number" refers to the physical size of the O-ring. The diameter difference between these two sizes is 3/64", a tiny difference. Either will work but I like the slightly snugger fit of the Dash 213 which means less chance of herniating the O-ring during flaring.

The same size of O-ring is made in many different materials. Whaler used Neoprene. I was the one who stared using EPDM because it seemed they might be a wee bit more durable in this application.

Posted by Joe Kriz on 03/16/10 - 9:28 PM

Tom,

I do NOT see any #9557K486 on the list you link to above...

I am getting frustrated here.
If it is going to be this difficult, maybe I should just erase all information here about O-rings and call it good.

The O-rings on that list state that all O-rings between dash number 201-284 are the same exact width.
1/8 inch fractional and 0.139 actual width in thousands of an inch.

The links I point to actually point to a specific O-ring....
Thanks for trying to help anyway....

And here it gets more confusing....
The #9651K48 and the #9557K482 are identical in size. The only basic difference is one withstands more heat. Both are dash number 213

O-ring for 1 inch brass drain tube. ($3.29 pack of 10)
#9561K48
Inside diameter = 15/16"
Outside diameter = 1 3/16"
Width = 1/8"
http://www.mcmaster.com/#9561k48/=6925wl48/=6925wl
This is a dash 213 O-ring
This O-ring does not meet the ANSI standards

O-ring for 1 inch brass drain tube. ($4.59 pack of 50)
#9557K482
Inside diameter = 15/16"
Outside diameter = 1 3/16"
Width = 1/8"
http://www.mcmaster.com/param/asp/PSe...Width=1074
This is a dash 213 O-ring
This O-ring meets the ANSI standards

----------------

O-Ring for 1 1/4 inch brass drain tube. ($4.00 pack of 10)
#9561K53
Inside Diameter = 1 3/16"
Outside Diameter = 1 7/16"
Width = 1/8"
http://www.mcmaster.com/param/asp/PSe...Width=1074
This is a dash 217 O-ring
This O-ring meets the ANSI standards

O-Ring for 1 1/4 inch brass drain tube. ($4.97 pack of 50)
#9557K486
Inside Diameter = 1 3/16"
Outside Diameter = 1 7/16"
Width = 1/8"
http://www.mcmaster.com/#9557k486/=69...86/=692atw
This is a dash 217 O-ring
This O-ring does not meet the ANSI standards

Edited by Joe Kriz on 03/17/10 - 1:31 PM

Posted by Tom W Clark on 03/16/10 - 10:32 PM

Joe -- That is true, but so what? McMaster-Carr sells lots of O-rings. If you want the 9557K486, they have them regardless of whether they show up on some list or not. If you want the FDA compliant versions at 40 cents each instead of the standard EPDM at 10 cents each, so be it, McMaster-Carr sells those too. I'm not sure I care if the O-rings on my boat's drain tubes are FDA compliant though.

My point is simply that there is no one "correct" O-ring. Lot of different O-rings will work and McMaster-Carr sells lot of different O-rings.

My local hardware store sells neoprene O-rings. Those would work too and we should not let people think that McMaster-Carr is the only place to get O-rings, they just happen to be one of the most convenient and reliable sources.

I like the EPDM and I like them slightly undersized for a snug fit. To each their own.

Posted by Joe Kriz on 03/16/10 - 10:54 PM

#10

Tom,
Some things matter to the people that have never done this job before and want to do it right.
We are trying to post information to aid people in buying the best product for the job at hand.
Things like this can be very confusing with all those dash numbers.. Really, who cares about a dash number then? I sure don't..

The inside diameter, outside diameter and the width of the O-ring is then probably the most important. Then the material if given a choice like EPDM (Ethylene Propylene) or Neoprene if that's all the hardware store has in stock.

A part number to anyone that doesn't know what to buy is like finding a $20 gold piece...
Can an old Copper Penny substitute for $20 gold piece? Neither can the wrong size or wrong part number for a part they need.

Something as simple as an O-ring shouldn't be this hard.
Hopefully the sizes given above should allow people to buy the correct O-ring if they don't want to go to their local hardware store.

Posted by wellcraft on 03/17/10 - 5:24 AM

#12

Is good for all that but read this

Limitations: Avoid highly polar solvents (Acetone, MEK, etc.) and direct exposure to ozone and sunlight.
http://www.marcorubber.com/buna.htm

cohasset73 wrote:
When I re-tube my drain holes I will use Buna-N O-rings which are very resistant to gas and oil. All the O-rings recommended in the previous posts will expand and likely fail when exposed to petroleum products. It may be a moot point regarding the sump drain.

Posted by Tom W Clark on 03/17/10 - 8:17 AM

#13

Joe -- It is not complicated at all, it is very simple. As you say, inside diameter, outside diameter and cross section are what matters and the Dash Number simply gives you that information all in one code, that's all.

Want a clickable part number? I gave those years ago. Want dimensions? I gave those too.

Want an O-ring that is a hair larger or smaller, that's fine too. Nothing complicated, wrong or incorrect about it.

The other thing I love about McMaster-Carr is you can look up comparisons for different materials. cohasset73 is not entirely correct. Nitrile (Burna N) O-rings are good, but not as weather resistant or saltwater resistant as EPDM or Neoprene.

EPDM does not expand on exposure to gasoline in a Whaler and is more resistant to ketones and detergent than Neoprene or Nitrile.

Posted by Joe Kriz on 03/17/10 - 1:13 PM

#15

Tom W Clark wrote:
Primer on dash Numbers:

http://www.mcmaster.com/#ansi-specifi...gs/=691db1

The 1-1/4" tubes would use Dash Number 217 , material of your choice. The EPDMs (what I use) are McMaster-Carr # 9557K486

Dash 218 EPDMs would be McMaster-Carr # 9557K487.

OK Tom,
I figured out why your link above didn't work for me on the "primer on dash Numbers"....
McMaster Carr uses frames so many times the links don't change when going from page to page.
This should be the primer in .pdf for McMaster Carr
http://www.mcmaster.com/library/20080...452KAC.pdf

However, just putting in the dash 217 to find an O-ring just doesn't come up with the 217 O-ring you list above.
It comes up with only ONE EPDM version and that is the #9561K53

However, on this chart, it shows the dash 217 in your link for the 9557K486 but doesn't show the part number above.
http://www.mcmaster.com/#catalog/116/...54/=69df42

So, YES, to me this is not an easy thing just to type in a number 213, or 217 to find the exact O-ring a person is looking for. It is not that easy as the McMaster Carr pages don't bring up the same O-rings every time..

If I'm throughly confused then I'm sure a few others might be too.
Yes, the 213 seems to be the right size O-ring for the 1 inch brass tubes.
and
the 217 seems to be the right size O-ring for the 1 /14 inch brass tube.

As you mention, some are more expensive then others. Some are roughly $4 for a pack of 50 and some are roughly $4 for a pack of 10.. From what I see, this has mostly to do whether or not they are ANSI, FDA, etc., and will withstand a higher heat range to 300º instead of 225º or 250º which isn't needed.

I am going to spend the rest of the day trying to get the links to point to the correct O-rings on McMaster-Carr site.
That is if I can find them.
The cheaper pack of 50 and the more expensive pack of (ANSI) 10....

Edit:
I think I have it figured out now. See my post above with the part numbers for both the cheaper 50 pack and the more expensive pack of 10.
Both part numbers for the dash 213 and the dash 217 O-rings will work just fine.

Edited by Joe Kriz on 03/17/10 - 1:39 PM

Posted by Tom W Clark on 03/17/10 - 1:41 PM

#16

Hey, I'm not in charge of McMaster-Carr's web site nor am I a fan of frames, but when I got to mcmaster.com I type in "O-ring" in the search field then click on EPDM (you can choose whatever material you want) then select Dash 213 from the pulldown menu.

That then gives the choice of two different EPDM O-rings that are 1/8" in cross section, 15/16" inside diameter and 1-1/16" outside diameter.

Choose the "standard" and that takes you to McMaster-Carr part number 9557K482. Done.

Since McMaster-Carr part numbers seem to change with time, perhaps it would be simpler to say: use Dash 213 or 217 O-rings in the material of your choice from the vendor of your choice.

For the record, Whaler used neoprene O-rings. I have no idea if those O-rings had an i.d. of 15/16" or 63/64," nor do I particularly care.

Posted by Joe Kriz on 03/17/10 - 1:53 PM

#17

It seems to depend on where you are on the McMaster-Carr page on which link they send you to and sometimes you can't get back to where you were.
That's my confusing... Not yours....

213 and 217 seems to work unless they change this in the future.
I finally listed 2 different part numbers for both the 213 and the 217...
The cheaper version in the pack of 50 seems to be the best bet.

I used to be a parts manager for a Farm Equipment outfit.
Believe me, part numbers matter...
Even an old part number can be cross referenced to a new superseded part number.
That is why I wanted to have the part number for reference here on our site.

Does anyone have a problem with that?

Here is the FINAL listing of part numbers for the Brass Tubing and the O-rings...
http://www.whalercentral.com/photogal...p;rstart=0

Unless of course someone else has something to add or change........ :-)

Edited by Joe Kriz on 03/17/10 - 2:05 PM