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40' Outlaw Upgrades - Twin 900Sc to 1000hp Duramax Diesels

Old 09-14-2020, 01:25 PM
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JB Weld fix this?

Calling this one a Weeping Weismann..


Here's the bottom plug shot. Water separates so nicely from synthetic oils after just a few hours settling time..


Last edited by kidturbo; 09-14-2020 at 01:39 PM.
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Old 09-14-2020, 02:08 PM
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Plan A was to weld up the cracks in the casting, then weld an 1/8" plate patch over this area for better support. However the welder called and said it looks like this area might have been repaired before. A few pits he noticed deep in the aluminum when grinding out the crack on Port. So,, Fess Up Fkers, who broke them first??

Besides the one repaired skeg, which had obviously been dropped on the concrete, snapped off, and welded back on sometime way before we purchased them, I never noticed any other welding marks before painted. So he suggested building up the whole area with weld rather than just applying a patch. Which should stronger than a patch attached on by just the outside edges. I agreed and headed back to his shop to check out the situation closer.

By time I made it back to his shop, Port side was done, and he was prepping Stbd. Gotta love a pro who ain't afraid of cast Alum.. Uploading a short video of his finger / pedal work now..















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Old 09-14-2020, 02:53 PM
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Now who's wants to see a video of prepping and repainting the outdrives ??

Screw that, add 12 more quarts of gear oil, and we're back out on the water again..

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Old 09-14-2020, 05:41 PM
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I really like that!


Great, engineered repair.



Originally Posted by kidturbo View Post
Plan A was to weld up the cracks in the casting, then weld an 1/8" plate patch over this area for better support. However the welder called and said it looks like this area might have been repaired before. A few pits he noticed deep in the aluminum when grinding out the crack on Port. So,, Fess Up Fkers, who broke them first??

Besides the one repaired skeg, which had obviously been dropped on the concrete, snapped off, and welded back on sometime way before we purchased them, I never noticed any other welding marks before painted. So he suggested building up the whole area with weld rather than just applying a patch. Which should stronger than a patch attached on by just the outside edges. I agreed and headed back to his shop to check out the situation closer.

By time I made it back to his shop, Port side was done, and he was prepping Stbd. Gotta love a pro who ain't afraid of cast Alum.. Uploading a short video of his finger / pedal work now..











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Old 09-14-2020, 05:55 PM
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how many more straws can you take with these drives?
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Old 09-15-2020, 12:12 AM
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Originally Posted by Boatlesss View Post
how many more straws can you take with these drives?
Ah we're just gettin' em broken in good and proper.. I'm guessing they won't come clean apart until somewhere around 52lbs of boost, in a light to moderate chop ...

Actually we spent a bit of time last night at the shop talking about what could cause this "core support plug" as Patrick called them to fail. Best we could conclude, the stress came from direct downward pressure on the propshaft. IE, brute force breaking the props loose with torque alone at low speed, while in full down trim. Sound reasonable? Or am I thinking backwards and it occurred when they were trimmed high and trying to carry the bow?

Should I be starting out with them trimmed up higher until they suck air? Before we lit the fires in the turbo I'd tried that approach, but didn't see any real improvement in spooling. Now it can break em loose in pretty easily in any trim position.

Last edited by kidturbo; 09-15-2020 at 12:18 AM.
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Old 09-15-2020, 10:27 AM
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If you’re turning out the prop shaft force should be up, if turning in it would be down.
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Old 09-15-2020, 11:14 AM
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Originally Posted by hogie roll View Post
If you’re turning out the prop shaft force should be up, if turning in it would be down.
In 2 Win Hogie...

Thanks for that explanation. Seems to align with the engineer review of a young college grad, and two old guys scratching their heads in unison.
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Old 09-15-2020, 02:55 PM
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Dude you know ya got a pro when he is running a grinder 1/2 inch from the propshaft and he is like "I dont need to put nothing over that propshaft, Im a professional..."

If that was me behind the grinder, the propshaft would look like Texas chainsaw massacre... LOL
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Old 09-15-2020, 07:08 PM
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He said, "I might need to grind that paint back a little bit around those cracks."

I said "Grab a 4 inch and write your name in em if ya want, won't hurt my feelings any.."
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