Spark plug gap

[sbaker]

First time changing the plugs on my 77 FJ40. I have the original owner's manual and the original 2F manual, they both say 0.039 (USA) for the gap. Yet many of the threads I've read and other online sites say 0.032. The manual does mention 0.031, but that's for Canada.

Should I go with 0.039 or 0.032?

Thanks,

Sean.

 

[1911]

My (1980) FSM says 0.039" for USA trucks and 0.031" otherwise.

 

[donny paradise]

So why is it the US has the wider gap ?

 

[JohnnyC]

afaik

smaller gap (points ignition)

larger gap (electronic ignition)

 

[harley745]

electronic gap 035 to 050.....45 being the best...

 

[sbaker]

Well I have no clue, is a stock 77 FJ40 point or electronic? I would think points. Why would the manuals say 0.039 then?

 

[sbaker]

OK, which is it?!

OK guys, I just received my spark plugs from CDan yesterday (OEM W14EXR-U). If the rain lets up for a bit this weekend in So Cal, I may have a chance to change my plugs.

So which is it? Should I listen to the 1977 manual and use 0.039 for the gap, or should I use 0.032? Or, will I not notice the difference of 0.007 anyways? I have a smog check coming up...

Thanks,

Sean.

 

[Fast Eddy]

First time changing the plugs on my 77 FJ40. I have the original owner's manual and the original 2F manual, they both say 0.039 (USA) for the gap.

Should I go with 0.039?

Re-read your original post, with the confusing part removed.

 

[sbaker]

0.039 it is

Going with 0.039. Thanks!