1997+ Mercury 35/40HP 2 Cylinder Outboards Service Manual PN 90-826148R2, Page 227Get this manual
Trailering Outboard WARNING Excessive engine trim angle will result in insufficient water supply to water pump causing water pump andor powerhead overheating damageMake sure that water level is above gear housing water intake holes whenever engine is runningWhile operating "up" circuit, the cylinder rod will continue to tilt the outboard to full up position for trailering
Trim "In" Angle Adjustment WARNING
Operating some boats with engine trimmed to the full "in" trim angle at planing speed will cause undesirable andor unsafe steering conditionsEach boat must be water tested for handling characteristics after engine installation and after any trim adjustmentsIMPORTANT: Some boatmotor combinations that are trimmed to the full "in" trim angle, will not experience any undesirable andor unsafe steering conditions during planing speedHowever, some boats with engine trimmed to the full "in" trim angle at planing speed will cause undesirable andor unsafe steering conditionsIf these steering conditions are experienced, adjust the left and right tilt stop pins to prevent unsafe handling characteristicsWater test the boatIf undesirable andor unsafe steering conditions are experienced (boat runs with nose down), adjust the left and right tilt stop pins in proper hole to prevent unsafe handling characteristics