Engine throttle wont stay where set

[Tanzersailing]

Hello everyone,

I have a Tanzer 8.5 sloop with a Yanmar 2GM powering it.

I am having an issue with my throttle not staying where i set it. As I press the throttle stick down in the cockpit and throttle up the engine, if I let go of it the throttle goes back to idle position quickly.

I'm wondering if I can adjust anything to slow this down or have it so the throttle stays where I set it. When under power I have to hold the throttle with one hand and the helm with the other the entire time otherwise the engine goes down to idle speed.

I've attached a photo of the side of the engine where the throttle cable connects to it.

[mcpusc]

they sell a "throttle cable brake" that adds some friction to the cable. it clamps over the cable at the control end & keeps the throttle from creeping.


you may find that you already have one & it just needs adjustment, that was the case on my boat.

[Bowdrie]

The common fix is a simple part from Morse Controls.
https://www.fisheriessupply.com/mors...-cables/044386

Out of stock at that location but should be an easy part to find.

[Topsailb]

I had the same problem. A cable clamp tightened on the throttle cable as near the control (not the engine) as possible stopped the slipping. Not so tight that the throttle barely moves-it took a few tries to get it to hold but not bind the cable.

Some choices to consider:
https://www.tractorsupply.com/tsc/pr...steel-n830-314
https://defender.com/en_us/wichard-w...s-cable-clamps

[Orion Jim]

Originally Posted by Topsailb

I had the same problem. A cable clamp tightened on the throttle cable as near the control (not the engine) as possible stopped the slipping. Not so tight that the throttle barely moves-it took a few tries to get it to hold but not bind the cable.

Some choices to consider:
https://www.tractorsupply.com/tsc/pr...steel-n830-314
https://defender.com/en_us/wichard-w...s-cable-clamps

Friction is friction, no need to be close to the throttle under anything but special conditions. Anywhere on the cable where you have easy access is the norm.

[kmacdonald]

A spring on the throttle lever on the engine is good and won't make moving the throttle harder. It will make it easier in fact. Some of the throttle return springs can be adjusted also. Take the cable off the engine throttle lever and see how hard it is to move. You want to lessen that return force. The throttle cable clamps work but makes it stiffer to adjust throttle.