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Author Topic: Starboard Pull-Out Strength  (Read 1043 times)

May 17, 2018, 11:42:59 PM
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boatnamesue

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Starboard Pull-Out Strength
« on: May 17, 2018, 11:42:59 PM »
I've got a mini stern saver fixed to my transom for transducer.  For those unfamiliar with stern savers, it's basically a square piece of starboard 3/4" thick.  Anyway, I want to use this stern saver to secure my bait pump, but I want to be able to remove pump when not in use.  The bait pump has a backing plate with 3 slotted holes. 

I was thinking to under drill 3 holes into the stern saver 1/2" deep, screw in 3 large head screws with flat washers.  When using the pump I'd slip the backing plate under the screw heads into slots, then snug down screws. 

My question is....will the repetitive turning in and out of these screws (1/4" at most) cause the screw holes to become "stripped" or lose screw bite over time?  Or is starboard so durable that it won't be a problem?
---------------
Jason
1976 AS 170
1998 S115TLRW

May 18, 2018, 04:26:56 AM
Reply #1

Woodeneye

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Re: Starboard Pull-Out Strength
« Reply #1 on: May 18, 2018, 04:26:56 AM »
Why not use say 3/16' stainless nyloc nuts & bolts with the bolt countersunk & inverted?
*SOLD*1981 222 CCP, Westport, MA.

May 18, 2018, 04:33:31 AM
Reply #2

Woodeneye

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Re: Starboard Pull-Out Strength
« Reply #2 on: May 18, 2018, 04:33:31 AM »
I may have just answered my own question. The starboard is already attached to your transom isn't it?
http://classicaquasport.com/smf/Smileys/fantasticsmileys/oops3.gif
*SOLD*1981 222 CCP, Westport, MA.

May 18, 2018, 04:40:58 AM
Reply #3

mshugg

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Re: Starboard Pull-Out Strength
« Reply #3 on: May 18, 2018, 04:40:58 AM »
The Starboard is kind of soft.  My guess is, the screws would eventually wear out the hole.  You could always instal threaded inserts like these: https://www.boatoutfitters.com/8-32-press-in-threaded-insert?gclid=EAIaIQobChMI3ubr6e2O2wIV3rjACh2M6QHSEAQYASABEgLM2PD_BwE

May 18, 2018, 11:18:29 PM
Reply #4

boatnamesue

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Re: Starboard Pull-Out Strength
« Reply #4 on: May 18, 2018, 11:18:29 PM »
I may have just answered my own question. The starboard is already attached to your transom isn't it?
http://classicaquasport.com/smf/Smileys/fantasticsmileys/oops3.gif

Indeed it is.  But that's a good idea had the starboard not been fixed to transom. 
---------------
Jason
1976 AS 170
1998 S115TLRW

May 18, 2018, 11:20:50 PM
Reply #5

boatnamesue

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Re: Starboard Pull-Out Strength
« Reply #5 on: May 18, 2018, 11:20:50 PM »
The Starboard is kind of soft.  My guess is, the screws would eventually wear out the hole.  You could always instal threaded inserts like these: https://www.boatoutfitters.com/8-32-press-in-threaded-insert?gclid=EAIaIQobChMI3ubr6e2O2wIV3rjACh2M6QHSEAQYASABEgLM2PD_BwE

Fantastic!  First I'm learning of these inserts.  Put a dab of 5200 in the starboard holes to firmly secure inserts in.  I'll look into these, thanks. 
---------------
Jason
1976 AS 170
1998 S115TLRW

May 19, 2018, 12:48:48 AM
Reply #6

boatnamesue

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Re: Starboard Pull-Out Strength
« Reply #6 on: May 19, 2018, 12:48:48 AM »
Oops, disregard my last.  Just recalled that 5200 doesn't bond with starboard. 
---------------
Jason
1976 AS 170
1998 S115TLRW

May 19, 2018, 05:41:13 AM
Reply #7

mshugg

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Re: Starboard Pull-Out Strength
« Reply #7 on: May 19, 2018, 05:41:13 AM »
You can actually get a good bond useung 5200 with Starboard.  Just rough it up.  I’ve even used a table saw to kerf the back of Starboard blocks for mounting accessories.  It also helps to pass a torch over the surface of the Starboard, not enough to melt or char, just to alter the surface for bonding.

May 19, 2018, 01:30:44 PM
Reply #8

boatnamesue

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Re: Starboard Pull-Out Strength
« Reply #8 on: May 19, 2018, 01:30:44 PM »
You can actually get a good bond useung 5200 with Starboard.  Just rough it up.  I’ve even used a table saw to kerf the back of Starboard blocks for mounting accessories.  It also helps to pass a torch over the surface of the Starboard, not enough to melt or char, just to alter the surface for bonding.

Good to know, thanks!
---------------
Jason
1976 AS 170
1998 S115TLRW

May 19, 2018, 08:21:15 PM
Reply #9

boatnamesue

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Re: Starboard Pull-Out Strength
« Reply #9 on: May 19, 2018, 08:21:15 PM »
Why not use say 3/16' stainless nyloc nuts & bolts with the bolt countersunk & inverted?

Thinking more about your suggestion here ^^^, despite the starboard already fixed to transom.  Let's say it wasn't fixed and thus had access to the transom-side of starboard.  I countersink the bolt head into the starboard on transom-side....when I go to lock down the nylon nut won't the bolt head turn as I apply clockwise torque to the nut, even turning by hand too?  Since it's a bolt and not a wide pitch threaded screw, I would think the bolt will spin freely, no? 

How about a hanger bolt for such an application?  Certainly won't spin.
---------------
Jason
1976 AS 170
1998 S115TLRW

May 19, 2018, 10:04:46 PM
Reply #10

wingtime

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Re: Starboard Pull-Out Strength
« Reply #10 on: May 19, 2018, 10:04:46 PM »
There is also a stud you can get that has wood screws on one side and machine screws on the other side.
1998 Explorer w/ Etec 250


1987 170 w/ Evinrude 90

May 20, 2018, 07:40:02 AM
Reply #11

mshugg

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Re: Starboard Pull-Out Strength
« Reply #11 on: May 20, 2018, 07:40:02 AM »
Quote

How about a hanger bolt for such an application?  Certainly won't spin.

No reason they wouldn’t work.  You could also use t nuts from the back of the block.

May 20, 2018, 05:51:12 PM
Reply #12

boatnamesue

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Re: Starboard Pull-Out Strength
« Reply #12 on: May 20, 2018, 05:51:12 PM »
There is also a stud you can get that has wood screws on one side and machine screws on the other side.

That's what I mentioned in my previous post, hanger bolts.  Gonna give these a go.
---------------
Jason
1976 AS 170
1998 S115TLRW

May 21, 2018, 11:19:19 AM
Reply #13

RickK

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Re: Starboard Pull-Out Strength
« Reply #13 on: May 21, 2018, 11:19:19 AM »
I used T-nuts to secure my console in fiberglass
Rick
1971 "170" with 115 Johnson (It's usable but not 100% finished)

1992 230 Explorer with 250 Yamaha

 

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