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How bad is it to be cracked here? It's about 3" long, parallel with the prop shaft. Almost looks like something hit it from behind, but I don't know what, when, or even how that would have happened. Is it ok to run for the weekend, or is this a major issue? Keep in mind I'm already going easy on her until I get my ride guide steering installed....

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Drain the gear case oil. If the oil looks milky, then you need to break out the wrenches and to some diagnostics, if it doesn't look milky, take it to a mechanic, so he/she could tell you if it need replacing or maybe just to be welded by a welding shop. best of luck, alex

I wouldn't run it. That's a major failure, if it's all the through.

It can be tig welded .Looks like someone hit it with a hammer maybe trying to steel you prop or something.I would sand alittle past the crack to make sure thats were the crack ends .A good welder will drill a hole at the end of the crack to stop the crack . Good luck

There's an O-ring behind that crack. If it's welded, the O-ring will be toast and water will get in. There's alot of loading on the prop shaft and you could very well have a catastrophic failure and lose the bottom half of your lower unit along with the prop. I wouldn't gamble running it. Look for another L/U with the right grar ratio.
Looks like it was stored trimmed UP over the winter and water froze in there.

I can say for sure it wasn't water, at least since I've owned it. It's parked outside my bedroom, so if someone hit it that hard with a hammer, I'd know it. Someone stole my patio umbrella off my deck at 3am the other morning, never caught him/her, but I watched it happen... Anyways, think I'll be looking for a new lower unit. Shame, this one's had all kinds of work done to it

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Just put a band aid on it and run it hard!!!
There... All fixed. It should be good to 108mph. That will be $250 please.

Lmao..... Ok, ok.... I get it! She'll be parked for a while! I need to put a roof on the house and take my ex wife to court though, so this may be a season ending injury for me and I was just starting to have some real fun with it too....

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Updating an old post for whoever may be reading.... We had a get together that I didn't want to miss, and ran this gearcase 1 more time.... About 1/2 hr run time and it split open like a clam shell. Luckily the prop and shaft didn't eject, but it was toast. Note so self, have a look at the gearcase after every run, and if it looks bad, it's probably worse..

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Thanks for the update!!
You dodged a bullet there buddy!

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