The Boating Forum - how to tell if a transom is bad

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View Full Version : how to tell if a transom is bad


chud
04-09-2006, 09:54 AM
what are the usual ways to determine if a transom is starting to go. The boat is a 1981 tiara 20 ft.,there are no cracks,but when i drilled a hole to mount a tranducer wire the plywood was intact but had some moisture in it.


strikerthree
04-09-2006, 10:21 AM
you have to have a moisture meter put on the transom it will read the level of mositure in the wood you maybe able to tell from that

Brad1
04-09-2006, 11:26 AM
How is the boat powered, I/O or outboard? If the boat is I/O powered, a typical sign of a bad transom is the appearance of stress cracks on the outside of the transom. The cracks will be in the location between the bilge drain and the botton of the outdrive and they're crescent shaped (they look like smiley faces).


Shark1007
04-09-2006, 11:33 AM
When the seller is not looking, leap onto the cavitation plate of the outboard and hop up and down like a madman, have a buddy watch the transom, if it's starting to go, it will flex a bunch.( this is the test on boats for sale )

Having re read the post, if you own the boat, don't jump as hard.

Glen E
04-09-2006, 01:28 PM
another place to look:
http://i67.photobucket.com/albums/h307/gersly123/DSC01979.jpg

reelapeelin
04-09-2006, 02:24 PM
were the drillings natural wood color or dark like coffee??...latter is a problem...

mronzo
04-09-2006, 08:30 PM
If you pulled the drill and the wood dust on the bit was wet I'd say you don't
need a moisture meter! ;?

strikerthree
04-09-2006, 08:39 PM
mronzo - 4/9/2006 8:30 PM

If you pulled the drill and the wood dust on the bit was wet I'd say you don't
need a moisture meter! ;?

why wouldnt you the wet wood could be isolated to that certain area rest of the transome could be dry

mirage2521
04-09-2006, 09:07 PM
strikerthree - 4/9/2006 9:21 AM

you have to have a moisture meter put on the transom it will read the level of mositure in the wood you maybe able to tell from that

My understanding of how these work is that they show relative moisture. If the whole transom is "wet" then you will get a uniform reading across the whole thang and will not know any more then you did when you started. I am sure if this is incorrect someone will pipe up and set us straight

mirage2521
04-09-2006, 09:10 PM
Shark1007 - 4/9/2006 10:33 AM

When the seller is not looking, leap onto the cavitation plate of the outboard and hop up and down like a madman, have a buddy watch the transom, if it's starting to go, it will flex a bunch.( this is the test on boats for sale )

Having re read the post, if you own the boat, don't jump as hard.

It will flex a bunch or you will land on your a$$ with an outboard in your lap. :grin:

IMHO, I would conduct the same test but with a more gentle approach. slowly apply weight to the cav. plate or lower unit , you will hear creaks or see flex if the rot is severe.

jloomis
04-09-2006, 09:15 PM
You can also tell by tapping around with a small hammer...both on the outside and inside (if accessable).

downtown
04-09-2006, 09:18 PM
the first suspicion of a "wet" transom is usually going to come from sounding it with a surveryor's hammer. without doing any more destructive testing, you could pull the screws out of the swim ladder or anything else on the transom and probe the coring around the hole. that is what i did when my surveryor suspected moisture. levels of moisture can very from one part of the transom to another. any older boat is going to read some moisture on the meter. the flex test shark suggested sounds like a joke, but if you do shake the engine and the transom doesn't move, you probably are okay.



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