Transom gudgeon bolt length?

BFD

New Member
Thread starter #1
Noticed the other day that my transom gudgeons and associated bolts are showing signs of corrosion and need to be replaced. One bolt head is already cracked off.
Boat is currently in dry storage near Phoenix about 2.5 hours north of my home in Tucson, Arizona.
I've bought new gudgeons but would like to know the length of the bolts I need before I head up for the repair.
I know they are 1/4-20 thread with a 7/16" bolt head but do not know the length without first pulling one out.
I know I should have thought about that before I left the boat.
But does anybody happen to know the approximate length of the transom bolts. I'm guessing maybe 2".
Thanks
 

BFD

New Member
Thread starter #2
Figured it out this past weekend. Bolts are 1/4-20 thread by 2" long.
But project was a bust on two accounts. Did not realize that there are two lower transom gudgeons stacked on top of each other for the bottom assembly. The top is a single unit. Also the replacement Schaffer gudgeon that I bought at APS has a slightly different hole spacing than the factory gudgeons so you would have to wallow out the holes through the boat if you go this route. There is about 3/16" in difference between the two. I'm now going to clean and carefully inspect my old ones and try to reuse them. I'm also going to install an aluminum backing plate as the interior surface is quite rough and irregular and the SS backing plate I made might be too stiff to evenly spread the load on all of the bolts. Good news is that hull and plywood transom is still in good condition despite the corrosion and 4 sheared off bolts. Photos attached of existing condition. I'll post new photos once the project is complete. Transon Gudgeon Exterior.JPG Transon Gudgeon Interior.JPG
 
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