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Cracked lower unit advice

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Ajn7157

New member
I just picked a 45 hp 4 stroke and noticed a crack on the lower unit. Is this a problem? Do I need to get it fixed/replaced before putting it in the water? Will oil mix with water through that crack?

Thank you in advance!
 

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If water is getting in, it will show up in the gear oil and or leak out when you fill it.

That’s a nasty looking crack. It likely needs welding up, if that’s possible.
 
Just my opinion but I don't think that welding that will work out too good because I don't think that the prop shaft holder is likely to seal up good when you put it back together.

Just guessing though.

Good luck.
 
Need to determine why it cracked.----Drain the gear oil.----Do you live in an area where you have freezing cold weather?.--Possibly cracked due to corrosion products building up in the thread for the big nut.--That can be welded , but care must be taken with threads for the nut.----Water will not get in the oil with that crack.
 
racerone said:
Need to determine why it cracked.----Drain the gear oil.----Do you live in an area where you have freezing cold weather?.--Possibly cracked due to corrosion products building up in the thread for the big nut.--That can be welded , but care must be taken with threads for the nut.----Water will not get in the oil with that crack.
Click to expand...
I just purchased it for a project. The person I got it from had it leaning up against a fence standing vertically, with weight on the prop. That’s how the housing cracked. South Florida motor
 
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