Cracked block question

[mercurymang]

OK, I got the power head off of the 850 last week and have spent the last several days cleaning everything. Last night, I decided to turn the power head on the side and take a look under neath. Here's what I found.


The crack doesn't appear to go very far. So is it scrap, can i get it welded. Can i run with it as it is?

 

[bajaunderground]

Re: Cracked block question

I would recommend cleaning it up and taking it to a machine shop and get their opinion on a fix/or replace. Aluminum can be repaired properly with a TIG welder? I would advise against a MIG welder?! I'd suspect either and overheating situation or a stress crack from use?

 

[Bob_VT]

Re: Cracked block question

Dealer's choice that is an exhaust to the mid section....... no fuel intake, no compression and basically it will not hurt anything. I guess you could have it welded for piece of mind however...... take it to someone who knows how to weld aluminum cast metal and not just a person who does aluminum "once or twice a year"

 

[Scott Danforth]

Re: Cracked block question

I would have it cleaned, prepped and DC TIGed

 

[Faztbullet]

Re: Cracked block question

Can i run with it as it is?

Wont hurt a thing....run it

 

[wired247]

Re: Cracked block question

Why all the hate for MIG welding aluminum. Ive got a Miller 212 with a Miller spool gun that makes absolutely beautiful full penetration aluminum welds. Kerf that out, weld it and dress and it would never crack again.

 

[mercurymang]

Re: Cracked block question

Why all the hate for MIG welding aluminum. Ive got a Miller 212 with a Miller spool gun that makes absolutely beautiful full penetration aluminum welds. Kerf that out, weld it and dress and it would never crack again.

Thanks for the response guys. I'll call around and see what they charge to fix it. If its too much, i'll just run it till it blows up.

 

[Scott Danforth]

Re: Cracked block question

my guy would charge $35

 

[mercurymang]

Re: Cracked block question

I called my machine shop and they said they would probably be able to weld it for $40.

 

[Faztbullet]

Re: Cracked block question

I got a block when you get done... when you weld aluminum it draws and thats right about on divider plate, to hot and it warps and plate wont seal then block is scrap. Leave it be as it wont hurt anything and its ran like that for years with no problems...let sleeping dogs lay..

 

[bajaunderground]

Re: Cracked block question

I got a block when you get done... when you weld aluminum it draws and thats right about on divider plate, to hot and it warps and plate wont seal then block is scrap. Leave it be as it wont hurt anything and its ran like that for years with no problems...let sleeping dogs lay..

Faztbullet knows his Mercury/Mariner's I would trust his judgement...if says it's fine, it's probably a little better than that!

Oh, I don't hat on MIG welding at all! For aluminum in tighter tolerance places and sensitive places the heat is easier to control/regulate with a TIG is all.

 

[wired247]

Re: Cracked block question

You'd be surprised how well a good spool gun with a powerful enough DC power source can weld. Especially on cast where you dont really want to heat the whole thing . I just finished welding a Bobs nose cone on my lower . Did a full perimeter weld and built up a skeg torque tab out of weld metal and it never got hot enough where I couldnt put my hand on it right after welding.

Faztbullet knows his Mercury/Mariner's I would trust his judgement...if says it's fine, it's probably a little better than that!

Oh, I don't hat on MIG welding at all! For aluminum in tighter tolerance places and sensitive places the heat is easier to control/regulate with a TIG is all.