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Author Topic:   Lower end problems
Ben posted 10-25-2001 08:26 AM ET (US)   Profile for Ben   Send Email to Ben  
One of those days. It was bad enough I had more water that oil coming out of my lower unit - but I stripped the lower oil drain screw right out. Now what? It is a 1977 200 HP Johnson that runs GREAT. Any suggestions - hate to spend a ton of money on the repair but ?? Will a helacoil work into the lower unit? Thanks for any and all suggestions.
Clark Roberts posted 10-25-2001 08:39 AM ET (US)     Profile for Clark Roberts  Send Email to Clark Roberts     
Ben, the helicoil may work but the depth of thread is not very great on the outboard foot oil drain hole! And, with a helicoil, the more threads, the better! Think about this... retap the stripped hole to next bigger size and fit with new screw! A good "bolt and nut" shop may loan you the tap but you can buy one cheaply enough. You may have to fashion the new screw as to buy one short enough may be tough... happy Whalin'... clark
Ben posted 10-26-2001 04:47 PM ET (US)     Profile for Ben  Send Email to Ben     
Thanks for the suggestion. Would I need to take the entire unit apart - any concern about shavings getting into the lower unit when I retap the hole?
acseatsri posted 10-27-2001 04:03 PM ET (US)     Profile for acseatsri  Send Email to acseatsri     
You may be able to use a thread forming tap rather than a cutting tap. They displace metal rather than cutting it, hence no shavings. Most industrial supply centers will have them or can order them. A little more expensive than regular taps, but no shavings in the lower unit.

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