Drain plug thread size 4.3l

solar7647

Lieutenant Junior Grade
Joined
Apr 23, 2009
Messages
1,218
Hey folks..... Does anyone know the thread size for 87 4.3l merc 262ci 205hp... 4 barrel carb... Alpha 1 drive.... I seem to have miss placed my plugs since winterizing and need to replace them ... I need to know the thread size for the block And manifolds.... Thanks
 

Don S

Honorary Moderator Emeritus
Joined
Aug 31, 2004
Messages
62,321
Re: Drain plug thread size 4.3l

That's why you put them back in after draining. you may also have to clean the threads, probably rusty.

1/4 NPT is the size.
 

solar7647

Lieutenant Junior Grade
Joined
Apr 23, 2009
Messages
1,218
Re: Drain plug thread size 4.3l

Thanks.... Yea i dont know what the heck i did with them... I alway put them in my safety kit box but apparently i didnt this time
 
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