Cruisers Forum
 


Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on Cruisers Forums. Advertise Here
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 23-08-2023, 21:02   #1
PNM
Registered User

Join Date: Aug 2021
Posts: 25
morse cable failure

upper and lower helm throttle levers move, cable end rods move in and out of cable housing, cable housing is properly clamped at helms and throttle attachment point. Cable end rods at throttle do not move in and out of cable housing as helm levers are activated.

How can this be??? Has the Morse cable actually ruptured the housing at some point along the path between the helms and the throttle?

I will try to trace the cables from helm(s) to throttle tomorrow, but some of the cable is obscured by bulkheads and equipment.

Any expertise is appreciated, as I would hate to pull a cable out and discover I DID NOT NEED TO DO IT!!!
PNM is offline   Reply With Quote
Old 23-08-2023, 23:06   #2
Moderator
 
Pete7's Avatar

Cruisers Forum Supporter

Join Date: Aug 2009
Location: Solent, England
Boat: Moody 31
Posts: 18,595
Images: 22
Re: morse cable failure

They do fail eventually. You could try removing the engine ends and see that that move freely, plus check to the the throttle and gear shift is also easy to move. If not its time for new cables, not expensive in the grand scheme of things.

There are the standard "Morse 33" type, but a decade ago a new premium cable came out from the likes of Quicksilver (Mercury). Thinner and able to take a tighter radius, plus super slick which is what you want on a power boat. Might be useful if the route from throttle to engine is long and tortuous.

Pete
Pete7 is offline   Reply With Quote
Old 24-08-2023, 13:34   #3
PNM
Registered User

Join Date: Aug 2021
Posts: 25
Re: morse cable failure

Thanks for your comment.

I noticed that when I move the throttle lever at the lower helm, the lever at the upper helm moves as if connected.

When I move the throttle lever with a wrench, the cable connecting rods move smoothly into the cable housings, yet the u/l helm levers do not move.

This suggests to me there is a bellcrank in the system - that I have not yet found. I will look again - more carefully, this afternoon.

I cannot imagine why they would have run two cables from the bellcrank to the engine!!! I need to diagram the cable system. Something strange is happening here!

Comments are appreciated.
PNM is offline   Reply With Quote
Old 24-08-2023, 13:46   #4
Registered User

Join Date: Mar 2007
Location: Santa Cruz
Boat: SAnta Cruz 27
Posts: 6,891
Re: morse cable failure

Sounds like the break is between the lower helm and the engine. Disconnect at engine and start pulling on the cable. You will probably find a broken cable end.
donradcliffe is offline   Reply With Quote
Old 24-08-2023, 15:12   #5
Moderator

Join Date: Feb 2010
Location: Australia
Posts: 3,566
morse cable failure

Somewhere in your dual station engine control system there’ll be a “splitter” with 4 cables in and one cable out to the gearbox and one to the throttle. There are many variations on how this actually accomplishes the single output cable, some rely on friction and some have a physical lockout changeover that has to be switched to select the active station but all are very delicate to adjust and very sensitive to sticky cables.
There may be 2 individual splitter units so just follow the cables and as an after thought, do you by any chance have 2 cables arriving at the throttle lever, this is a variation that is often done to eliminate one splitter.
skipperpete is offline   Reply With Quote
Old 24-08-2023, 16:30   #6
Registered User

Join Date: May 2015
Location: Muskegon, Mi
Boat: Columbia 36
Posts: 1,247
Re: morse cable failure

I just had to change the shift cables on my trawler. Both upper helm shift levers were very stiff. My system is set up with the bell crank in the lever housing. Move the upper cable and it pushes/pulls on one side of the lower helm crank. The other end of the crank has the cable to the engine/trans. I disconnected the upper cable from the lower control, found the lower lever moved freely but the upper was still stiff. That diagnosed the problem, the upper cables were bad. Replaced both and problem fixed. The fly bridge cables are more exposed to the elements so they corrode first.
capt jgw is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Recommendations for Morse cable tight radius Dave_S Construction, Maintenance & Refit 8 07-07-2019 16:38
Aground: Failure of skill, failure of judgment, bad luck Jammer Seamanship & Boat Handling 76 29-09-2018 08:46
Fridge Failure - Danfoss BD35F motor start failure Anjin Plumbing Systems and Fixtures 67 22-03-2018 05:21
Lagoon 440 Morse cable lenght Bohemian Marine Multihull Sailboats 2 27-05-2016 05:20
Morse Cable routing query bony Engines and Propulsion Systems 10 21-01-2013 23:17

Advertise Here


All times are GMT -7. The time now is 07:37.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.