Repairing Sticky Throttle Cables: A Boat Owner's Guide

how to repair sticky boat throttle cables

Sticky throttle cables can be a real nuisance, but there are a few things you can try before replacing them. Firstly, check for any binding where they connect to the outboard and throttle as this may just need lubrication. If the cables are mounted under the gunnel, corrosion is less likely to be the issue, but it's worth checking for any kinks in the cables. You can try disconnecting the cables from the engine to see if the problem persists, and if not, you can try lubricating them. This can be done by holding one end high and rigging a plastic tube filled with lubricant, or by using a product like 'mousemilk', which is designed to free up cables. Soaking the cable in motor oil is another option, but this will require removing the cable from the boat first. As a last resort, you may need to replace the cables entirely, especially if they are very old.

Characteristics Values
Problem Throttle cable is sticky or stiff
Possible Causes Corrosion, water in the sleeve, fraying, old grease, dirt, fishing line, plastic pieces of crud
Possible Solutions Replacing the cable, lubricating the cable, using penetrating oil, soaking in liquid wrench, replacing with hydraulic steering, disconnecting from the engine, checking for binding
Suggested Products Mousemilk, Deep Creep, motor oil

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Disconnect the throttle cable from the engine

Disconnecting the throttle cable from the engine is a straightforward task that can be completed in a few simple steps. Here is a detailed guide on how to do it:

Locate the Throttle Cable: Begin by locating the throttle cable on your boat engine. It is usually found near the engine or the control box.

Access the Throttle Cable Connection: You may need to remove any components or covers that are blocking access to the throttle cable connection. This could include removing screws or brackets that secure the cable in place.

Loosen the Throttle Cable: Before disconnecting, loosen the throttle cable by adjusting any screws or clamps that hold it in place. This will make it easier to detach the cable from the engine.

Disconnect the Throttle Cable: Once you have located the throttle cable and loosened any connections, you can carefully disconnect it from the engine. Gently pull the cable away from the engine, ensuring that you have enough slack to work with.

Secure the Cable: After disconnecting the throttle cable, it is important to secure it safely to prevent any tension or accidental reconnection. You can use cable ties or zip ties to hold the cable in place temporarily.

Inspect and Clean: With the throttle cable disconnected, take this opportunity to inspect the cable for any signs of damage, corrosion, or fraying. If necessary, clean the cable and its housing with a suitable lubricant to ensure smooth operation.

By following these steps, you will be able to safely and effectively disconnect the throttle cable from your boat's engine, making it easier to perform maintenance or repairs. Remember to consult a professional or a repair manual for specific instructions pertaining to your boat's make and model.

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Check for binding

When dealing with sticky throttle cables, it is important to check for binding, which can occur where the cables connect to the outboard and throttle. This can cause restriction in movement and affect the performance of your boat.

To check for binding, start by disconnecting the cables from the engine. This will help you isolate the issue and determine if the problem lies within the cables themselves or with the engine connection. Once disconnected, carefully inspect the cables for any signs of corrosion, kinks, or damage. Pay close attention to any hidden or hard-to-reach sections of the cables, as issues in these areas may be more difficult to spot.

If you suspect binding, try lubricating the cables. This can be done by holding one end of the cable high and using a plastic tube to fill it with lubricant. Allow the lubricant to sit for several hours, or even a few days if possible. This process will help reduce friction and improve the movement of the cables.

Additionally, check for any debris or buildup that could be causing the binding. In some cases, old grease or grime can harden and restrict the movement of the cables. Cleaning out the cable steering tube and lubricating it can help address this issue.

It is worth noting that control cables are mostly sealed, so the only accessible part for lubrication is the visible end. If the binding issue persists after lubrication and cleaning, it may be necessary to replace the cables.

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Lubricate the throttle cable

Lubricating your boat's throttle cable can be a great way to restore its smooth operation and save you from having to replace it. Here's a detailed guide on how to do it effectively:

Firstly, disconnect the throttle cable from the engine. This will help you identify if the problem lies within the cable itself or somewhere else in the system. If the cable still feels sticky, then lubrication is likely the solution.

Now, you'll want to choose a suitable lubricant. Some people recommend using lightweight lubricating oil, while others suggest more specialised products like 'mousemilk' or 'Deep Creep'. You can also use products like PB Blaster or ATF, followed by a thinner oil for maximum effect. It's important to avoid grease, as it can dry and cause binding.

The next step is the lubrication process itself. There are a few different methods you can use:

  • Bag Method: Place the upper end of the cable into a plastic bag and tape it securely. Partially fill the bag with your chosen lubricant and let it hang with a rag or bucket at the bottom to catch any drips. Allow the oil to work its way down the cable, and top up the bag as needed.
  • Tubing Method: Take a length of clear plastic tubing and slide it over the cable end. Clamp the tubing to the outer jacket of the cable. Fill the tubing with your lubricant and use a Schrader valve to pump it down into the cable. You may need to refill and pump several times.
  • Funnel Method: Disconnect the cable at the motor and attach a funnel to the end. Pour in your lubricant and let gravity do the work. Have some napkins ready to catch any excess oil that comes out.

After you've applied the lubricant, give it some time to work its way through the cable. Then, test the throttle to see if it's functioning smoothly again. If not, you may need to repeat the lubrication process or consider replacing the cable.

Remember, this lubrication process is a temporary solution. While it can buy you some time and save you money in the short term, replacing the throttle cable is often the best long-term solution.

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Replace the throttle cable

If your boat's throttle cable is sticky, you may want to consider replacing it. Before you do so, you should check for binding where the cables connect to the outboard and throttle, as this may just need lubrication. If the cables are mounted under the gunnel, corrosion is unlikely to be the issue.

If you do need to replace the throttle cable, you should order the correct length. Cables must be long enough to reach from the throttle and shift controls to the engine, but not excessively long. The length is normally stamped on the jacket of the cable, usually on the helm end. If you are replacing an old cable, use the same length as the one you are replacing.

  • Start with the engine rig. Remove the nylon lock washer from the drag link and loosen the nut from the tilt tube to free the cable from the engine.
  • Remove the connection from the steering wheel.
  • Before you pull the old cable out of the boat, attach a messenger line at the steering wheel end.
  • Pull the old cable out from the engine end and thread the new cable through, using the messenger line.
  • With the new cable in place and connected, you are ready to go out on the water.

It is recommended that you replace both the throttle and shift cables at the same time, as one faltering cable is a sign that the other may not be far behind.

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Check for corrosion

Corrosion is a common issue with boat throttle cables, especially if they are plastic-jacketed. Corrosion can cause the cable to become sticky, stiff, or seized up. To check for corrosion, you will need to inspect the cable for any signs of splitting or cracking in the plastic jacket. If the jacket is split, this will allow moisture to enter, leading to further corrosion and more splitting, so it is important to address this as soon as possible.

If your throttle cable is difficult to advance, you may need to remove and replace the cable. However, you can try to repair it by lubricating the cable. First, disconnect the cable from the engine and check if the problem persists. If the cable is still sticky, you can try to lubricate it. There are a few different ways to do this. One method is to hold one end of the cable high and rig up a plastic tube filled with lubricating oil so that it can drain into the cable. Let it sit for a few hours. Alternatively, you can use a product called "mousemilk", which is used to free up cables on aircraft and is said to be very effective.

If lubrication does not solve the problem, you may need to replace the cable. This is a relatively straightforward task and can be done by following the manufacturer's instructions. It is important to choose a replacement cable that is specifically designed for marine applications and is compatible with your boat model.

Frequently asked questions

The first step is to identify the cause of the stickiness. Disconnect the cables from the throttle shift control and check if the problem persists. If the cable is corroded, you may need to replace it. If the cable is simply stiff, you can try lubricating it with oil or a product like 'mousemilk'.

To lubricate the entire cable, you must first remove it from the boat. Then, insert one end of the cable through a hole in a heavy-duty zip-seal bag. Secure the bag around the cable with duct tape and poke a hole in the top corner to hang it. Pour motor oil into the bag to submerge the cable and leave it to soak.

If lubrication is not possible or does not work, you may need to replace the cable. This can be done at relatively low cost and with some simple tools.

To prevent stickiness, ensure that your cables are well-lubricated and maintained. Check for corrosion and replace old cables.

Repairing sticky throttle cables can be dangerous if not done correctly. If the cable is corroded, it may be more cost-effective and safer to replace it rather than attempt to repair it. For safety reasons, it is always best to consult a professional if you are unsure.

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