Engine mount repair

[jbcurt00]

Re: Engine mount repair

For motor mount stringers, I'd probably make the 1/4" chopped milled fiber added Hairy PB, not PL.

If you'd rather you can cut up scrap CSM to make your own 1/4" chopped milled fibers....... 1 less material to buy & uses up some scraps.....

 

[Woodonglass]

Re: Engine mount repair

Yep motor mounts should be fully encapsulated with a minimum of 2 layers of 1708 and CSM. I'd personally recommend 4.

 

[tjizzle]

Re: Engine mount repair

Thanks for replys jb and wood. Will update as soon as it warms up and I can start glassing for now I will grind everything down and get wood cut and ready.Sure I'll have more questions as I go. Thank You
TJ

 

[jigngrub]

Re: Engine mount repair

The mounts that I will be covering are 25" long 4" wide and 10" in hieght.

To make these I'd cut 5 pieces of 3/4" plywood 25"x10" and glue them together for a 25" long by 10" high by 3-3/4" wide "log", not exactly 4" wide... but close enough and this will be the strongest build.

If you have a place to glue these up and keep them in the warm, I'd go ahead and build them now so they'll be good and cured when it comes time to install them.

 

[tjizzle]

Re: Engine mount repair

Thanks for the suggestion jig,I was planning on making these within the next week or two. Today I was doing some grinding and while I was at boat I found another problem. When I first got the boat it had 1/4"hole in keel so I took to fiberglas shop and had repair done from outside.Today I noticed a bead of water on this area so climbed under and found hairline crack where keel meets the hull. I took gas tank out to get a look at this area on the inside and everywhere along keel on inside looks okay.So now Im wondering how water is getting in there.Anyone have any ideas?

 

[jigngrub]

Re: Engine mount repair

I'd reinforce that crack area with the CSM and 1708 schedule from the inside since you're going to have the material and access.

Have you drilled your transom to check for rot? I'm thinking the same water that rotted your MM stringer could've damaged your transom too, and a bad transom will let water in.

 

[mxcobra]

Re: Engine mount repair

that water may have been traped under the deck this whole time......?

 

[mxcobra]

Re: Engine mount repair

can we get pics of this crack you speak of.....

 

[tjizzle]

Re: Engine mount repair

Thanks for the replys jig and mx. I have drilled transom and was dry and light colored so I think Im good there. I am going to reinforce the area while I have it opened. Now I am wondering if my leak is up more towards front and its working its way back to where the crack is. I will get over to boat to get better pics as soon as it drys up around here we had some snow and rain today. Thanks again for everyones help.
TJ

 

[tjizzle]

Re: Engine mount repair

These are pictures of the crack on outside (sorry phone doesnt take best pics)The crack is hard to see.

And here is a pic of this area on the inside(the black spots are crud inside little indents in glass that I havent cleaned out yet.

Thanks for any input. TJ

 

[Woodonglass]

Re: Engine mount repair

Grind the glass down on the inside approx 6 " away from the crack all the way around. Bevel the grind towards the crack so it's "Dished Out" . Then do this...

Each layer should be approximately 1 1/2" larger than the previous one. Oval or rectangular...Makes no difference.

 

[73Chrysler105]

Re: Engine mount repair

Grind the glass down on the inside approx 6 " away from the crack all the way around. Bevel the grind towards the crack so it's "Dished Out" . Then do this...

Each layer should be approximately 1 1/2" larger than the previous one. Oval or rectangular...Makes no difference.

WOG has some great advise but I would suggest doing this on the outside as well since the crack actually goes through to the outside.

 

[tjizzle]

Re: Engine mount repair

So I stopped at boat today after work to do some more investigating and I think I found the problem spot.About 3' up from the the crack on the inside there is a hole in the glass and water coming out,did some poking around in there and I believe there is wood in there(at least thats what it looks and feels like)it is dark colored and wet but is solid.Next I went to outside boat at the spot of crack and drilled some holes in the keel,water came out and it felt hollow so now I beleive my repair will be a little more involved. Im thinking I have to cut keel open on outside,put in new wood,grind on both sides of keel and glass over. My questions are can I do a repair like this from the inside so I dont disturb the gelcoat,if so how is this done,and if not is my plan for outside repair correct,and do I cut the keel flush with the hull or do I just cut the top off?? Also had another question on diff subject my gas tank I removed was 100 gal and does not fit through the access that is there for it(my uncle had them put in bigger tank when they were building boat) so had to take out rear bulkhead and the 3" strip of the deck that seperates the access panel and engine compartment to get it out.I have no need for a tank this big but its in good shape so I was wondering if its possible to cut end cap off tank,cut length to fit in access and have end welded back on possible? If not wanted to start looking on CL for smaller tank. Thank you for everyones help.
TJ

 

[jigngrub]

Re: Engine mount repair

The inside repair to the keel would be best and strongest.

... and since you're already going to be into your boat knee deep, why not just go full blown restore on the stringers too? Things are starting to rot on the inside of your boat and there's no telling how much longer those stringer will last. Wouldn't it be better to go ahead and cut them and the bulkheads out now and put them back new instead of waiting for them to go out and then having to open up your boat again? It would be worth it for the peace of mind I would think.

 

[tjizzle]

Re: Engine mount repair

Thanks for reply jig, I would love to do a full resto on this boat for the experience alone but right now I dont have the money or a place to do it because I believe I will have to pop the cap off to do transom.Stringers and transom are in good shape so for now just going to do repairs necessary to keep boat safe. As far as the keel repair goes when you say inside repair would be best do mean cut glass on inside till I can get to wood,dig it out,put new wood in and glass over? Thanks
TJ

 

[jigngrub]

Re: Engine mount repair

As far as the keel repair goes when you say inside repair would be best do mean cut glass on inside till I can get to wood,dig it out,put new wood in and glass over? Thanks
TJ

Exactly!

Fiberglass repairs are almost always better done from the inside, and any ugliness from the repair is hidden. You can get a good overlap for strength and don't have to worry about trying to blend/fair back into the hull or repairing gelcoat. Trying to do that repair from the outside would be a total PITA and probably never would look exactly right.

 

[73Chrysler105]

Re: Engine mount repair

Pics of this new repair area are needed sounds like it could be a wood cored hull which might just about make it junk if the wood core is rotted out. it could also be just a section o f the core rotted out. It might not be wood cored at all either but if the core is rotted out then that means that everything has to be removed and the inner skin of the hull completely removed a new core put into place and new inner skin put into place then stringers and everything else reinstalled.

 

[tjizzle]

Re: Engine mount repair

Thanks for reply chrysler. I dont believe this is a wooden core hull I believe its a piece of wood in the keel I can stick my finger in and feel the sides of the strip.Thank you
TJ

 

[73Chrysler105]

Re: Engine mount repair

Yeah it was an assumption on my part without having pictures to verify.

 

[tjizzle]

Re: Engine mount repair

I will try to get over to boat to get pics of this area inside.Anyone have any input about my gas tank idea?
Thank you
TJ