Stiff or Seized Mechanical Steering - Lubricate, Inspect and Replace the Steering Cable

Notice exactly what you feel:

• Stiff all the time, or getting worse each season: usually tilt tube corrosion or a corroding cable.
• Stiff in only one direction, or near full lock: often a tight cable bend, a binding link arm, or the engine hitting something.
• Lots of free play or "slop": worn helm, worn cable, or loose connection hardware.
• Engine shakes side to side at speed (flutter): backlash in a single-cable system or loose hardware.
• Wheel jerks or pulls hard one way: normal prop torque on many outboard boats, made worse by trim; but sudden changes deserve a check.

Engine off, key out, lanyard removed. Tilt the engine to a comfortable height and support it as your manual says. Look at the engine end of the cable: the nut where the cable threads onto the tilt tube, the ram sliding out of the tube, and the link arm to the engine's steering arm.

Disconnect the link arm from the engine (keep the hardware in order, and plan to use new locknuts and cotter pins on reassembly). Now:

• Turn the wheel. If it turns easily now, the cable and helm are fine and the drag is at the engine: tilt tube corrosion, a dry swivel bracket, or a binding link arm.
• Push the engine by hand side to side. If the engine is hard to turn on its own, its swivel bracket needs grease or service.
• If the wheel is still stiff with the engine disconnected, the cable or helm is the problem. Go to step 6.

Most outboards have grease fittings on the swivel bracket and tilt tube. Use the grease your engine maker specifies and pump until fresh grease appears. See the outboard grease points guide for locations. A swivel bracket that stays stiff after greasing may need a dealer.

This is the routine SeaStar suggests at least twice a year:

1. Unthread the cable nut and pull the telescopic ram out of the tilt tube.
2. Clean the inside of the tilt tube thoroughly and remove corrosion with a wire brush. Wipe out all the loose material.
3. Scrub the ram with a brass wire brush and wipe it clean. Look for pitting, bends or deep scratches.
4. Coat the inside of the tube and the sliding part of the ram with water-resistant marine grease.
5. Reassemble with the correct locking fasteners, tight, with no binding.

MasterCraft's routine for its cable-steered inboards is similar: clean old grease off the cable end with solvent, spread fresh grease on the exposed cable, and work the wheel back and forth. If the steering is now smooth with the engine connected, you're done. Recheck it after a couple of trips.

Ram frozen in the tilt tube? A forum regular's advice that matches what mechanics say: soak the joint with penetrating oil (owners wrap the end with tubing or a rag so it soaks in for hours or days) and rock the ram back and forth with a wrench to break the corrosion free. Don't hammer on the end of the ram: it mushrooms the threaded end and can make removal nearly impossible. If it won't come free with patience, or the ram is pitted once it's out, plan on a new cable. Seized rams almost always come from skipping the clean-and-grease routine, so keep it on your seasonal list once it's free.

Follow the cable from the helm to the stern with a flashlight:

• Cracked, split or swollen outer jacket: water gets in and the inner core rusts. SeaStar says to replace any cable with a damaged jacket, and BoatUS's spring launch checklist says the same about control cables: cracks or swelling in the jacket mean corrosion inside and a cable that must be replaced.
• Kinks or tight bends: West Marine says SeaStar recommends a minimum bend radius of about 8 inches. Tighter bends make steering stiff and wear the cable out early.
• Zip ties cinched tight: leave a little slack so the cable can flex as it works.
• Rust or a bent ram at the engine end.

With the engine disconnected, if the cable still binds, feels gritty or notchy, or won't move smoothly, it has internal corrosion or wear. Replace it.

Remove the steering wheel cover and look behind the dash. Check that the helm is firmly mounted, the wheel nut is tight, and the wheel doesn't wobble on its shaft. With the cable disconnected at the helm, turn the wheel: a helm that grinds, binds or has a lot of play is worn. SeaStar warns that taking the helm or cable apart voids the warranty and can lead to steering failure, so don't open them. If the helm is worn, or the cable for your helm is no longer made, replace the helm and cable together as a kit.

• Look for a part number and length stamped on the old cable's jacket. That's the easiest way to order the right one.
• Confirm whether your helm is rotary or rack, and which family. West Marine notes several helm and cable styles look similar but don't fit each other, and newer back-mount rack helms use a different cable from older rack systems.
• If you're replacing the helm too, consider a no-feedback (NFB / Zero Torque) helm, which keeps prop torque from pulling the wheel. West Marine recommends it for outboards without power steering.

Each brand has its own rule, so use the one for the cable you're buying:

• Dometic SeaStar rotary cable (old cable in hand): Dometic says to measure the plastic jacket in inches, add 18 inches, and round up to the next whole foot. "Measure twice, order once."
• Rack cables: the allowance is different from rotary cables. Use the measuring instructions from the maker of the rack cable you're buying.
• UFLEX universal rotary cable: West Marine's listing says to measure the outer sleeve from mounting point to mounting point, add 22 inches, and round up to the closest foot.
• Old cable already gone: measure along the real route the cable takes, not a straight line. West Marine's method adds three distances (wheel center to gunwale, along the gunwale to the transom, and to the engine connection), then adds 6 inches for cables that go through the engine tilt tube or subtracts 6 inches for cables mounted to the transom or splashwell, and rounds up. Laying a garden hose along the path makes this easy.

If you land between sizes, go up. A cable a little long can be routed in gentle curves; one too short won't install correctly and can make the steering unsafe.

1. Disconnect the engine end (step 3) and unthread the cable from the tilt tube.
2. At the helm, remove the wheel (use a puller if it's stuck; don't hammer the shaft), then remove the bezel and the nut that holds the cable to the helm, and pull the cable out of the helm.
3. Tie a light line to the engine end before you pull the old cable forward. When it comes out at the helm, the line stays in the boat to pull the new cable back along the same route.
4. Note every clamp and clip location so you can put them back.

1. Pull the new cable through with the messenger line, following the old route. Avoid sharp bends, especially where it leaves the helm and where it turns toward the engine.
2. Feed the cable into the helm and secure it exactly as the cable instructions describe.
3. Grease the telescopic ram and the inside of the tilt tube generously before sliding the ram through. SeaStar's advice to installers is "grease, grease, grease."
4. Thread the cable nut onto the tilt tube and tighten it as your instructions say.
5. Connect the link arm using new locknuts and cotter pins of the type the kit or engine maker specifies. West Marine and SeaStar both warn that using non-locking fasteners can lead to steering failure.
6. Secure the cable along the hull with clamps or zip ties, snug but not cinched tight.

• Turn the wheel lock to lock several times. It should be smooth with no binding.
• Check full lock in both directions with the engine tilted down, then tilted up. Make sure the engine, cable and link arm don't hit the transom, other engines, the splashwell or wiring at any point.
• Re-check every nut and cotter pin.
• Shift and throttle cables should move freely and not rub on the new steering cable.

Start in calm water at idle and make gentle turns both ways, then gradually increase speed. Feel for binding, slop or flutter. Recheck the connections after the first trip. After that, repeat the tilt tube cleaning and greasing (step 5) at least twice a season, more often in salt water.