Re: 1958 johnson seahorse 18hp head torque specs.
Seahorse 18--is your engine a model FD-12?<br />The Johnson Service Manual lists the following<br /> Model FD <br />Cylinder Head Screws <br /> Ft Lbs 8-10 In Lbs 96-120<br />Exhaust cover screws <br /> Ft Lbs 5-7 In lbs 60-84<br /><br />There's more if you need other power head specs.