Motor mount stringer repair Help Please

Sixtycycle

Recruit
Joined
Jul 16, 2017
Messages
4
Hello,
I have a 1997 Riner 232.
I found my motor mounts collapsed last weekend just before heading out for a day in the water.
So far I pulled my 5.7 out and now cut the tops of of the area where the mounts where to access the inerds.
I found the wood completely rotted and disintegrated.
I have throughly removed all of the junk and found that Rinker smartly encased this part and had a wrapped bulkhead on all sides. I imagine so when these fell apart nothing else would be harmed or rotted.
So here's my question...
What's the best of the methods that I'm contemplating to reattach my construction back to the fiberglass bottom, sides and "lid" (the part I cut off).
Of course sand and grind a bit of all to securely bond to prior once all is dry etc...
By the way I left plenty of existing tabs in place from the original glass basically think of a fiberglass box to form a poor or box to sit in newly constructed mount base.

1. Use Coosa bonded together and cut the shape of the cavity/box and secure it with a bedding 5200 and then add peanut butter for the voids then add the cap back on and glass all tight and drill my new lags?

2. Fill the cavity/box with SeaCast let it take the shape filling all voids then Tap new holes then add the cap back on and glass all tight and drill my new lags?

3. Some other magical way I haven't heard of yet???

I know we all have differing opinions sometimes just trying to make a secure connection back to the original fiber with new motor mount area to bolt to.
I bought her basically brand new in 1997 from a reputable dealer after he repo'd her after the original buyer failed to make ANY payments.
In 2005 a friend Was storing it for me while I was in another state and somehow the plug was inadvertently left in (Thanks Rick). It was also stored where rain and snow had blown in and you guessed it she flooded the engine bay area and she sat like that for 7months.
I'm sure that was the start of the water intrusion in the lag bolt holes
Thanks for any help, I've done about all my own work to this baby since new and feel like keeping her going for a while longer
Take care!
 

Scott Danforth

Grumpy Vintage Moderator still playing with boats
Staff member
Joined
Jul 23, 2011
Messages
52,179
Your going to find that rot is farther reaching than just the motor mounts
 

Sixtycycle

Recruit
Joined
Jul 16, 2017
Messages
4
I appreciate and realize that, I've contemplated using her the rest of the year once mounts are done and then doing a "Friscoboater" style workover.
Only reason is this seems fairly contained and all the rest of the area surrounding is still strong. I've done some investigating since this was bad, but found nothing else in poor shape.
With that said can you offer any advice to my questions?
Thanks
 

tpenfield

Moderator
Staff member
Joined
Jul 18, 2011
Messages
18,996
:welcome: to iBoats.

As Scott said, the rot usually goes further than you initially think (hope). But after you have 3 posts, you can post pictures, which will help with responses, because we can see what you are seeing.

Most folks have built back up with wood, but I think the seacast and other products have their advantages. I would not use Coosa board in a 'compressive load' situation, such as an engine mount.
 

Sixtycycle

Recruit
Joined
Jul 16, 2017
Messages
4
wont let me post a pic yet says i am not aloud to add or remove attachments???


It shows the box I left to tab into after I grind to get some teeth in it
Again guys I am aware there are likely more issues and I appreciate your knowledge that is why I am asking for everyone's input for "best way to either attach or pour something to tap into for the mounts.
Thanks for the direction on Coosa. they say better than plywood and lighter etc...but no compressive load value though huh?
Thanks tpenfiled
 

tpenfield

Moderator
Staff member
Joined
Jul 18, 2011
Messages
18,996
You will be allowed to post now that you have a few posts under your belt. There is a 'stickie' on posting photos
 
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