Transom build up 16" to 20"

[Deano]

Hello,

I am looking for any instructions and possibly some pictures from a transom build up that someone may have completed.

I am attempting to build up a transom on a 16' Aluminum Tiller presently it has a 16" transom and i need to go to 20". The boat has a big full width splash well already so I don't think that should need remanufacturing.

I was thinking I would attempt to replace the present wood in the transom with treated bringing the whole transom to the desired height then capping it with stainless a good 6 inches down both on the inside and out of the transom and having a welding shop weld up the seams. Does this sound reasonable.

If anyone has any ideas or information please post.

 

[tashasdaddy]

Re: Transom build up 16" to 20"

does the transom need replacing, is it rotted. if not a jackplate would be a solution. what size engine are you going to use.?

 

[Deano]

Re: Transom build up 16" to 20"

Plans are to put a 35HP Honda Four Stroke Tiller on it.

The only fear I have with the jack plate is the 2 open spots on each side. Would these need to be filled in. And what type of torque a jack plate puts on the existing transom.

The present transom is in good shape no rot present as it is a about a 15 year old aluminum boat.

 

[Frank Acampora]

Re: Transom build up 16" to 20"

I did it on a narrow transom and hung a 90 on it--the boat in my avatar. You make a 5 inch plate of plywood to match the existing wood thickness in the existing transom. You don't need stainless. Very difficult to work with and a lot more money. Take .080 aluminum-- please, not diamond plate! Everybody thinks it'e the be-all and end-all but it's not. Regular hard aircraft grade --like speed limit signs-- is best. Make two pieces about 10 inches deep plus the thickness of your transom, and the width of your transom. Put a bend in the pieces about the thickness of the transom. Now install each piece on the transom, one inside and one outside with the bends over each other on top of the transom. Through bolt with 1/4 inch SS boltsstarting from the center, two in the new section and two in the old section of transom vertically. Then work to the sides leaving room for the engine clamps. Total, about 20 screws. Use angle gussets in the corners to re-inforce the transom and you are there. Just remember to drill the splash well drain holes. It will handle a 35 like there is nothing on it. If you want to see the one I did, go to Chrysler Crew, join, and go to photo albums. Look for Frank's Boats.