That hole looks oddly like an old large through hull opening instead of a “crack”. 
Your repair probably wont last long as it has very little strength (epoxy on 1/5” edge around the hole only) 
For a proper repair, You have to grind out the plywood on the inside and do a few layers of fiberglass cloth and glass (polyester resin) then glass on new marine plywood backing for a proper repair.  Then you finish the exterior like you did then paint.  

Bob (palatka)

> On Jun 28, 2019, at 10:24 AM, JP Dempsey <joedempsey at hughes.net> wrote:
> 
> Jim,
> I've just had the same problem. I don't know the cause but here's how I
> fixed it:Raise motor, if still on lift to point where it begins to tilt to
> take pressure off of the plate.  Remove the lower phillips screw in the
> guide plate and swing plate to left. My Rhodes has plywood reinforcing on
> the inside so I couldn't get to both sides. I didn't need fiberglass mat,
> just a West Epoxy System repair kit. Grind out rough edges of crack and sand
> surrounding area with 60 grit paper. Mix epoxy and with the syringe, force
> epoxy into the damaged area. Add thickener to the remaining epoxy to a past
> consistency and spread into the damaged area. I'm surprised that there is no
> reinforcement on the inside of your lazarette! "Respite" was recycled in
> 2005. My guess is that the motor lift was added at that time. I still need
> to get some dark blue epoxy paint. Any suggestions from the List?
> 
> I don't know what caused the damage, but suspect the guides that follow in
> the metal tracks are shot. Hopefully, it will last through the season. I'd
> appreciate any evaluation or comments on my repair process. My first venture
> into hull repair.
> 
> <http://rhodes-22.1065344.n5.nabble.com/file/t752/Transom_Damage.jpg> 
> <http://rhodes-22.1065344.n5.nabble.com/file/t752/Transom_Damage_Sanded.jpg> 
> <http://rhodes-22.1065344.n5.nabble.com/file/t752/Transom_Damage_Epoxied.jpg> 
> 
> 
> 
> 
> -----
> JP Dempsey
> s/v Respite 
> Rhodes 22 1989/2005
> Marshall,VA
> --
> Sent from: http://rhodes-22.1065344.n5.nabble.com/