Transom plate question

[GSPLures]

Hope you all are doing well. My transom plate cracked on the bottom, the transom was rotted when I bought the boat previous owner torqued it and must have cracked it. The bottom piece fell off when I removed it.

I am looking for a replacement and I believe the part # is 65550A2 the stamped number on the plate is 65550. When I searched that number I came up with a couple parts that look identical but the stamped number is 79000


I still have the piece that broke off but figured tig welding it would be near impossible due to it breaking at the bolt holes.

Can anyone confirm if this is the correct replacement part my motor is a 1973 140 I just want to be sure due to the different casting numbers on the plates.

 

[Bondo]

I still have the piece that broke off but figured tig welding it would be near impossible due to it breaking at the bolt holes.

Ayuh,..... That, ^^^, is what I'd do,.....

That little piece does little to nothing, once everything is bolted in,.....

 

[GSPLures]

Cool thanks. I have to find someone with a tig welder now, all I have is a mig. I assumed it was not very important but then I kept second guessing my assumption because the motor sits on the plate.

 

[Bondo]

Ayuh,.... I have a mig set up for aluminum, 'n no tig,.....

I did pretty much that same repair with the mig,.....
Lotsa tiny tacks, 'n abit of grindin',....
Once painted it was hardly noticeable,...
Once installed, obviously, you'd never know,....

 

[GSPLures]

I may just get some aluminium wire and I need to refill my gas. I have never welded cast aluminum I was under the impression you had to tig it. Welding and grinding are my specialties lol, I was a body mechanic so my welds didnt have to be pretty because they all were grinded anyway. I appreciate the advice.

 

[GSPLures]

Now that you mention it I cannot believe brazing did not immediately pop in my head. May be a little easier to get a good weld. If I have time this weekend I may go get some aluminum rods and fire up the old mapp gas

 

[tank1949]

Hope you all are doing well. My transom plate cracked on the bottom, the transom was rotted when I bought the boat previous owner torqued it and must have cracked it. The bottom piece fell off when I removed it.

I am looking for a replacement and I believe the part # is 65550A2 the stamped number on the plate is 65550. When I searched that number I came up with a couple parts that look identical but the stamped number is 79000
View attachment 334824
View attachment 334822
I still have the piece that broke off but figured tig welding it would be near impossible due to it breaking at the bolt holes.

Can anyone confirm if this is the correct replacement part my motor is a 1973 140 I just want to be sure due to the different casting numbers on the plates.

any good TIG welder should be able to fix it.

 

[Rick Stephens]

Needs a TIG or MIG weld. Brazing is not welding. I own a welding company, I'd do the job for $40 or $50. Cleaned, ground, welded and repainted.

 

[GSPLures]

Needs a TIG or MIG weld. Brazing is not welding. I own a welding company, I'd do the job for $40 or $50. Cleaned, ground, welded and repainted.

Yeah I was leaning towards mig but I need to get my gas refilled and some aluminum wire. Problem is the hours I work I cannot get to airgas to have my cylinder filled. I may call a few places around here. If you live in the metro detroit area of Michigan I would be glad to take it to you

 

[Rick Stephens]

Yeah I was leaning towards mig but I need to get my gas refilled and some aluminum wire. Problem is the hours I work I cannot get to airgas to have my cylinder filled. I may call a few places around here. If you live in the metro detroit area of Michigan I would be glad to take it to you

Well, if you were closer to northern Idaho, I'd do it

Only way I mig aluminum is with a spool gun. I tried pushing aluminum wire, even harder alloys way back when with the gun whip cutback to 6 feet. Still didn't work without birdnesting all the time.

 

[GSPLures]

Well, if you were closer to northern Idaho, I'd do it

Only way I mig aluminum is with a spool gun. I tried pushing aluminum wire, even harder alloys way back when with the gun whip cutback to 6 feet. Still didn't work without birdnesting all the time.

Yeah ive read about that. I have not welded aluminum yet, my welding experience is mostly from working in a body shop so it was always steel. Most of the aluminum that came through the shop that got hit was trashed beyond repair so it was just replace. I tried to talk the better half into a tig welder but I would rather fish from my boat not sleep in it lol.

There are a few fabrication shops around my area I am going to give them a call and then depending on costs weigh my options depending on cost of equipment to cost of just having it done.

Is it impossible to feed aluminum wire through a standard gun? I assumed doing small tacks rather than running a bead would help avoid a birdsnest. Then on the other side id rather not have my welder look like my bait caster after my friend "who knows how to use it" casts.

 

[Bondo]

I have not welded aluminum yet,

Ayuh,.... Find a friend or shop to do it for ya,....

Like Rick says, a spoolgun is the only way to mig it,....

'n weldin' aluminum is really nothin' like weldin' steel,....

 

[tank1949]

Well, if you were closer to northern Idaho, I'd do it

Only way I mig aluminum is with a spool gun. I tried pushing aluminum wire, even harder alloys way back when with the gun whip cutback to 6 feet. Still didn't work without birdnesting all the time.

UR 100% correct! I built an aluminum tuna towner one time using MIG w/o spool gun and went through about 100 tips-Like pushing wet noodles through a cat's butt. Bird nests too!!!

 

[Rick Stephens]

Yeah ive read about that. I have not welded aluminum yet, my welding experience is mostly from working in a body shop so it was always steel. Most of the aluminum that came through the shop that got hit was trashed beyond repair so it was just replace. I tried to talk the better half into a tig welder but I would rather fish from my boat not sleep in it lol.

There are a few fabrication shops around my area I am going to give them a call and then depending on costs weigh my options depending on cost of equipment to cost of just having it done.

Is it impossible to feed aluminum wire through a standard gun? I assumed doing small tacks rather than running a bead would help avoid a birdsnest. Then on the other side id rather not have my welder look like my bait caster after my friend "who knows how to use it" casts.

A couple things for you on welding aluminum. First of all is the gas is different - need 100% Argon. Next is either a TIG process or a MIG that accounts for the way aluminum wire is soft, expands when heated, gets soft in the welding tip, and tends to stick in the tip while welding. If you loosen the drive rollers to prevent the sticking, it just melts to the tip and still birdnests, unlike a steel wire. Sticking at the tip is what causes bird nests in the drive rollers. The wire sticks a bit in the tip and the wire hesitates enough to make a mess.

I tried a lot of stuff to weld aluminum trailers with a LN-25 suitcase wirefeeder. I used a harder alloy, 5356. Always used a size bigger tip, like .045 to run .035 wire or .052 tip to .045 wire. I disassembled and cutdown a whip to a super short 6 foot length, still would bird nest at any moment, even though it worked after a fashion.

Solutions are either a spoolgun, which only pushes the wire 4 or 5 inches or a push/pull whip which has drive rollers in the gun. The second is the best for production and what I ended up with while building trailers. The spoolgun is a little clumsy and uses really small rolls, so you end up changing wire out a lot.

 

[GSPLures]

A couple things for you on welding aluminum. First of all is the gas is different - need 100% Argon. Next is either a TIG process or a MIG that accounts for the way aluminum wire is soft, expands when heated, gets soft in the welding tip, and tends to stick in the tip while welding. If you loosen the drive rollers to prevent the sticking, it just melts to the tip and still birdnests, unlike a steel wire. Sticking at the tip is what causes bird nests in the drive rollers. The wire sticks a bit in the tip and the wire hesitates enough to make a mess.

I tried a lot of stuff to weld aluminum trailers with a LN-25 suitcase wirefeeder. I used a harder alloy, 5356. Always used a size bigger tip, like .045 to run .035 wire or .052 tip to .045 wire. I disassembled and cutdown a whip to a super short 6 foot length, still would bird nest at any moment, even though it worked after a fashion.

Solutions are either a spoolgun, which only pushes the wire 4 or 5 inches or a push/pull whip which has drive rollers in the gun. The second is the best for production and what I ended up with while building trailers. The spoolgun is a little clumsy and uses really small rolls, so you end up changing wire out a lot.

I appreciate the info. I will probably end up finding a shop around me to weld it up. Eventually I will probably get the right equipment to weld aluminum as I already can weld steel adding the ability of welding aluminum will be valuable to me.

 

[todhunter]

I appreciate the info. I will probably end up finding a shop around me to weld it up. Eventually I will probably get the right equipment to weld aluminum as I already can weld steel adding the ability of welding aluminum will be valuable to me.

Shop around for a good quality used TIG machine. I got a pretty good deal on mine on CraigsList. I'm not a pro, but I do like welding aluminum, and you're right - it's very useful.

 

[76SeaRay]

If it were me, I would just find a shop and have them TIG it. By the time you get the right stuff and figure out how to do it, way cheaper and faster as Rick points out.