Need specs for johnson O/B 15 hp

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spinfisher

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I have to replace a head gasket and would like to get the torgue specs if anyone has them. It's a johnson Model j15rcob, Thanks
 
You need to know what size the bolts are. OMC used a torque spec based on fastener size (as most of us do in the industry):

1/4" 5-7 ft-lb
5/16" 10-12 ft-lb
3/8" 15-22 ft-lb
7/16" 28-30 ft-lb

The only exception to this was the through bolts on the starter.
 

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