Steering Wheel Jerks Or Is Difficult To Turn; Power Trim Does Not Operate (Motor Does Not Operate); Power Trim Does Not Operate (Motor Operates But Sterndrive Unit Does Not Move) - Mercury 4.3 TKS series Operation & Maintenance Manual

Section 6 - Troubleshooting

Steering Wheel Jerks or Is Difficult to Turn

Possible Cause
Low power steering pump fluid level.
Drive belt loose or in poor condition.
Insufficient lubrication on steering components. Lubricate.
Loose or missing steering fasteners or parts.
Contaminated power steering fluid.

Power Trim Does Not Operate (Motor Does Not Operate)

Possible Cause
Blown fuse.
Loose or dirty electrical
connections or damaged
wiring.

Power Trim Does Not Operate (Motor Operates but Sterndrive Unit Does Not Move)

Trim pump oil level low.
Drive unit binding in gimbal ring.
Page 88
Check for leak. Refill system with fluid.
Replace and/or adjust.
Check all parts and fasteners. If any are loose or missing, see authorized
Mercury MerCruiser dealer immediately.
See authorized Mercury MerCruiser dealer.
Replace fuse. Fuses may be located near the dash trim switch, at the trim pump, in the
positive (red) power trim battery lead near the battery switch, or a combination of these.
Check all associated electrical connections and wires (especially battery cables). Clean and
tighten faulty connection. Repair or replace wiring.
Possible Cause
Remedy
Remedy
Remedy
Fill pump with oil.
Check for obstruction.
90-8M0113857 DECEMBER 2015
eng