mid unit/lower unit seem leak

[Dan Dude]

I just installed a '73 65hp johnson on by boat. The top runs smooth and the bottom is pretty good too. While flushing it out I notice a pin (large pin) hole leak comming from the starboard side seem Just over a side bolt where the lower unit connects to the mid section. There is some corrosion along the seem but does not look drastic. <br />Is the water comming out of there actually flowing through anyplace where it shouldn't be flowing? I believe my water pump and electrics are toward the front of the shaft and the leak would be behind the shaft. Could it cause a problem? And if so can I take off the lower unit, sand it (or fill it) and put it back on?

 

[DJ]

Re: mid unit/lower unit seem leak

That is the exhaust housing. It is full of water, while running, to keep the exhaust cool and quiet.<br /><br />The hole you're referring to is probably a housing drain to prevent freezing.<br /><br />That seam is not watertight.

 

[Dan Dude]

Re: mid unit/lower unit seem leak

I'm glad to find out the seam isn't watertight, but the water shoots out from the seam itself (not a housing drain) from a little pinhole on some corrosion on the seam. Is that something I should be concerned about?