PRODUCT INSTALLATION GUIDELINES
TORQUE IN NEWTON METERS
NOTE: All torques specified refer to clean threads lightly lubricated.
All torques to be checked in the direction tightened. Break-away torque values do not relate accurately to seating torques.
Torques specified relate to bolts and screws. For nuts use 80% of
grade 5 values for corresponding fastener size.
Torque values relate to commercial fasteners only. Like threads applied to fabricated parts need to have appropriate torque values specified to those unique parts/applications.
All torque specifications presume zinc-plated fasteners. Other finishes will require adjustments to specifications.
Grade #2 fasteners do not apply within these torque recommendations and are prohibited by Barr Marine for use.
Tolerances on specifications is +/- 20% unless noted.
Self tapping screws will meet 75% of grade 5 specifications for seated torque after threads are fully developed. Driving torque may exceed specifications as threads are developed.
Any gasket used to seal water passage ways i.e. manifold to riser/elbow gasket should be sealed with a sealant. Sealant should be a high temperature, non-silicone, aviation grade sealant.
Gasket used to seal manifold to engine can be applied without the use of any sealant.