gmanl11

Newbie
Mar 7, 2013
33
47
castaic/CA/US
Name
garrett larue
Boat
The shark
Old transom had corrosion problems and wood behind the aluminum. Decided to rebuild it with a full extended transom and get rid of all the wood.

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SDFishingRob

Well Known "Member"
Aug 19, 2010
233
57
San Diego/ Gonzaga Bay
Name
Robert
Boat
2 Malibu Stealth Kayaks
Bitchen! Ive been looking at those boats tuff lately as I would like to get 1 to keep at my place in Baja. What size outboard are you going to slap on that thing?
 
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Baller

Jig Chucker
Nov 16, 2010
2,621
1,842
La Mesa
Name
Bill
Boat
American Angler
Rad..!!!
 
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Bigeasy

yeah, yeah!
Jun 18, 2008
1,542
286
Vallejo, CA
Name
Eric W.
Boat
Tunacious 238 Coastal Twin 150-E
It really appear that you can build that same boat better than the Builder! That looks frigging amazing!!!! DAMN! Those welds look better than the manufacturer! That sucker should FLY! Looks like more than 3 feet added to the length! My boat has that same integrated transom and it put a lot of clean water under the prop!! I'm a fan!!! Impressive!
 
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gmanl11

Newbie
Mar 7, 2013
33
47
castaic/CA/US
Name
garrett larue
Boat
The shark
It really appear that you can build that same boat better than the Builder! That looks frigging amazing!!!! DAMN! Those welds look better than the manufacturer! That sucker should FLY! Looks like more than 3 feet added to the length! My boat has that same integrated transom and it put a lot of clean water under the prop!! I'm a fan!!! Impressive!
Appreciate the kind words! Exactly what I was going for! Yeah it should add a good amount of planing surface and buoyancy to the stern
 
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Sushi King

SUSHI KING
May 31, 2008
401
86
novato,ca,usa
Name
Bob
Boat
18 bayrunner sushi king
Sweet looking job! What gauge plate and type did you use?Did you use a Spool Gun or just the TIG ? How hard was it doing the weld on the bottom upside down?Did you have any problems with the old aluminum taking a weld?I have a 18 and want to do the same to it I have a small Econotig that works for small stuff that i do but not sure it could do this big of a job.I have a couple of small cracks on my bottom that i need to weld just not sure about going for it gravity screwing me getting a blowout hole and how do i run the peddle lying on my back?
 
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gmanl11

Newbie
Mar 7, 2013
33
47
castaic/CA/US
Name
garrett larue
Boat
The shark
Sweet looking job! What gauge plate and type did you use?Did you use a Spool Gun or just the TIG ? How hard was it doing the weld on the bottom upside down?Did you have any problems with the old aluminum taking a weld?I have a 18 and want to do the same to it I have a small Econotig that works for small stuff that i do but not sure it could do this big of a job.I have a couple of small cracks on my bottom that i need to weld just not sure about going for it gravity screwing me getting a blowout hole and how do i run the peddle lying on my back?
Thanks! I used .125 5052 aluminum and it's all tig welded. The weld on the bottom was a little more difficult but not as bad as I thought, just make sure that the pieces being welded are completely cleaned. I used a flap disc on an angle grinder and stainless steel brush to clean it. I didn't have to much of an issue with the old aluminum. Yeah even with my tig, the torch would over heat and I would have to wait a few min before continuing to weld. Wish I had a water cooled tig torch and I used an old battery to prop the foot pedal up against to weld underneath the boat. It might be a little much for the econotig, might want to invest in something a little more heavy duty.
 
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el Toro

I Post A Lot But I Can't Edit This
Feb 19, 2003
9,157
1,633
Point Loma
Name
Nate
Boat
Artemis
Holy shit! Not sure I've ever seen better skills at welding. Alum is so tough. Congrats. How did you stiffen and thicken the motor mount part of the transom? Is ther more wood or some sort of plate there?
 
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gmanl11

Newbie
Mar 7, 2013
33
47
castaic/CA/US
Name
garrett larue
Boat
The shark
Holy shit! Not sure I've ever seen better skills at welding. Alum is so tough. Congrats. How did you stiffen and thicken the motor mount part of the transom? Is ther more wood or some sort of plate there?
Thank you! Yeah aluminum is very tough to weld and no wood. I used c channel that's welded where the bolts from the outboard go through. Than braced it using angled 2X2 aluminum pieces.
 
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Black Cat

Member
Jan 19, 2016
380
245
45
Temecula
Name
Chris
Boat
Bertram Bahia Mar
Beautiful and creative! Nice work, wish I was a bit closer because I would love to see it in person. I've been mulling over the same concept on a 91 westcoaster widebody I have. The ride needs more deckspace, and ditching the splash well will add some room back around the transom.
What tools did you use to get a clean cut on the AL when you sliced off the transom skin and could you show a picture or two, or three of how you mated the new bracket (lower portion) to the floor of the boat? I see two channels acting as stiffeners, and the L pieces adding strength and shape to the chines. You have motivated me to figure this one out. Do you have any idea of the # of amps you were welding with. I have about 180 amps available with a decent duty cycle, but would like to run the math on how long it would take to stitch together using an aircoold torch and under 180 amps.
Is the base metal of the bayrunner 5051? Thanks so much for posting this up as I've only seen a few of this properly completed. Take care
Chris
 
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