Stripped oil drain plug!

johnboat78

Recruit
Joined
Jan 6, 2020
Messages
2
I have a 2016 Mercury 20hp 4 stroke with a stripped engine oil drain. Can anyone tell me if a ‘piggyback’ drain plug will work to fix this? The mechanic said he couldn’t put in a helicoil and a new oil pan would be over $1,000...
 

Scott Danforth

Grumpy old guy who plays with boats
Joined
Jul 23, 2011
Messages
33,837
find a new mechanic. Helicoil or other threaded insert would be the fix.
 

alldodge

Supreme Mariner
Joined
Mar 8, 2009
Messages
31,490
If the pan is not thick enough a heli won't work. Could remove the pan, and braze or weld a weld nut in place

If there is room, tap to next larger side plug

For that matter, remove, weld closed, drill and tap to original size
 

jimmbo

Fleet Admiral
Joined
May 24, 2004
Messages
9,270
FInd out if Merc has a Service Bulletin regarding stripped Oil Pan Drains.
 

roscoe

Supreme Mariner
Joined
Oct 30, 2002
Messages
20,640
Piggyback should work if you can find the right thread size.
 

Chris1956

Supreme Mariner
Joined
Mar 25, 2004
Messages
23,849
Gee, how about using a flush bushing thru the original hole, with a pipe fitting on the inside to fasten it. It would require removal of the pan.
 
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