Drain plug thread size 4.3l

[solar7647]

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]

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]

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