2006 Johnson SD 3.5 HP 2 Stroke Outboard Service Manual, PN 5006562, Page 90Get this manual
POWERHEAD ASSEMBLY Thoroughly clean and degrease the mating flanges of the crankcase and cylinder block with non-petroleum based solvent, such as isopropyl alcohol or acetone, and let air dryApply Locquic Primer to the mating flange of the crankcase and let air dryUse small brush to dab thin, even coat of GelSeal I! sealant to the cylinder block mating flangeThe application must not come within 14 in (6.4 mm) of bearingsscrews with Gel-Seal I! sealantTighten screws to torque of 90 to 120 inIbs(10 to 14 Nm)) r:t-::::::-::::-
1Screws
Install the crankcase headLightly coat threads of the two crankcase head screws with Gasket Sealing CompoundTorque screws to 60 to 84 in Ibs (7 to Nm)