Torque

brian3127

brian3127

Chief Petty Officer
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Jun 10, 2007
Messages
489
I have a 1975 Johnson 40-hp 40el75c
The book only tells me the amount of torque for the head bolts. I need the torque spec for the water jacket plate
 
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OptsyEagle

Lieutenant
Joined
Sep 13, 2006
Messages
1,356
Re: Torque

I would say that it is probably because it doesn't really matter. You just want them very snug to make sure the gasket seals good. If later you see a little water come out, snug it down some more. Since you are squeezing down on a gasket it wouldn't hurt to snug them in a rotational fashion, a lot like you would do for the head bolts.
 
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F_R

Supreme Mariner
Joined
Jul 7, 2006
Messages
28,195
Re: Torque

Actually, it does give the torque---listed as "standard screws"

#6 = 7-10 in lb
# 8 = 15-22 in lb
#10 = 25-35 in lb
#12 = 35-40 in lb
1/4" = 60-80 in lb
5/16" = 120-140 in lb
3/8" = 220-240 in lb.
 
brian3127

brian3127

Chief Petty Officer
Joined
Jun 10, 2007
Messages
489
Re: Torque

I saw that table with the bolt size but the bolt that it uses is not listed I use a 7/16 socket on the bolt
 
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F_R

Supreme Mariner
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Jul 7, 2006
Messages
28,195
Re: Torque

The bolt sizes listed are the thread size, not head size. I'm pretty sure those you are asking about are 1/4-20 bolts.
 
brian3127

brian3127

Chief Petty Officer
Joined
Jun 10, 2007
Messages
489
Re: Torque

I just guessed and torqued them to 100 in lbs thanks for the help
 
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