Transom Question

78V20 · #1 06-28-2012, 03:23 PM

OK I am new to the forum but have a few questions......I just purchased my first v20 it is a 78 steplift 20 ft. I am repowering and was thinking of putting a 200 horse evinrude outboard on the back. I am concerned about the additional weight (Had a 140 evinrude on it) with the transom notched the way they are...I am concidering building up the transom another 5 inches and going with a 25 inch shaft or do you think the weight will not be a issue and just adding a Jack plate with a 5 inch vertical lift will be ok? Thanks in advance

tsubaki · #2 06-28-2012, 04:14 PM

The "78 Cuddy was rated for 240 horse, the Fisherman was rated for a 200 horse. Don't ask me why.
Checking/inspecting the transom is highly suggested. Looking for decayed wood, rot, etc.
Building up for a 25" should be considered a transom rebuild unless the existing stuff is in almost perfect condition.
Using a jack plate for a 25" in a 20" situation should be considered only if the existing transom is almost perfect given the extra torque applied.

78V20 · #3 06-28-2012, 04:28 PM

Quote:

Originally Posted by tsubaki

The "78 Cuddy was rated for 240 horse, the Fisherman was rated for a 200 horse. Don't ask me why.
Checking/inspecting the transom is highly suggested. Looking for decayed wood, rot, etc.
Building up for a 25" should be considered a transom rebuild unless the existing stuff is in almost perfect condition.
Using a jack plate for a 25" in a 20" situation should be considered only if the existing transom is almost perfect given the extra torque applied.

Thanks for the reply I have the cuddy but did not know it was rated for 240 Learn something new everyday....Transom Is Like new rebuilt 2 years ago. Makes me feel a little better looking at Jack Plates instead of rebuilding the transom.

I was more concerned about the additional weight and it pushing the stern down....I know there is about 100 lbs or so of additional weight with the 200 evinrude 200 from the 84 140 rude that was on there.....

This is a great site and I hope to contribute half of whatr I have learned back in the future

tsubaki · #4 06-28-2012, 04:33 PM

Go to the "history" section.
Think this is it for yours.
http://www.wellcraftv20.com/gallery/cat_1978?page=1
For the full gamenet go here and go where you want.
http://www.wellcraftv20.com/

Kracker Jack · #5 06-28-2012, 05:12 PM

with a jack plate and a 25 inch motor cant you just put a "filler" in the notch to bring the freeboard up? the jackplate bolts to a standard 20" transom cant you just glue core and then glass the notch, its not structual at that point. Unless the jackplate lips over the 20" notch. Most jack plates ive seen are sraight up the transom and does not roll over the transom lip unless the steering arm or other objects keep from filling in. Or am I just talking jiberish? LOL!!!!

tsubaki · #6 06-28-2012, 05:21 PM

I think we are saying the same thing.

78V20 · #7 06-28-2012, 05:40 PM

Quote:

Originally Posted by Kracker Jack

with a jack plate and a 25 inch motor cant you just put a "filler" in the notch to bring the freeboard up? the jackplate bolts to a standard 20" transom cant you just glue core and then glass the notch, its not structual at that point. Unless the jackplate lips over the 20" notch. Most jack plates ive seen are sraight up the transom and does not roll over the transom lip unless the steering arm or other objects keep from filling in. Or am I just talking jiberish? LOL!!!!

Yeah That was the plan if I use the jack plate. As you said not structural at that point. Then I will just out ball valves into the splash well area and all should be good. Thanks again for all the help.

tartuffe · #8 06-28-2012, 07:32 PM

I have an 81 with a 200 hundred rude on the back with a jack plate. Mine is a center console so I would think even lighter in the bow. While not recommended as acceptable, my transom was rotted all to hell and it never flexed or showed signs of flex. Only knew I had a problem when putting on a transducer and black mud oozed out.

78V20 · #9 06-28-2012, 07:53 PM

Quote:

Originally Posted by tartuffe

I have an 81 with a 200 hundred rude on the back with a jack plate. Mine is a center console so I would think even lighter in the bow. While not recommended as acceptable, my transom was rotted all to hell and it never flexed or showed signs of flex. Only knew I had a problem when putting on a transducer and black mud oozed out.

Thanks sorry to hear of the black goo.....I know the transom is good as it was rebuilt/ replaced 2 years ago and it is solid no doubt. Will be adding the jack plate then back to fishing

Destroyer · #10 06-28-2012, 08:29 PM

I have a 78 Cuddy w/ a 2 stroke 1991 Johnson 200 HP 20" shaft. I don't have any problems with weight in the back. Before you think about jack plates, rebuilding transoms, etc. I'd suggest that you just mount the 200 and see what the result is. I'm betting that you won't need anything except a nice day and gas.