Engine Synchronizer/Throttle Issue

[JoeV]

Hello to All,

Being a newbie to the site forgive my "newbieness" and lack of correct jargon :smt100

Two weeks ago we moved up to a 2001 Sea Ray 400 SB with Cummins 430's and have an issue with the engine synchronizer and throttle.
1. The Starboard (Slave) Throttle does not reach maximum throttle. It reaches the maximum throttle position which does not correspond to its true maximum RPM. The Port throttle has no problem reaching maximum position and RPM.
2. When engaging the Engine Synchronizer the master takes over and the Starboard Throttle control is disabled however the Starboard engine does not repsond and stays at idle.

This occurred this last weekend and my remedy was to shut down the engines and crawl into the engine compartment. I noticed that the limit switch on the top of the controller was enaged which would disable the slave throttle (as it is designed to do). I jiggled the collar and it moved off the swtich. This resulted in regaining control of the Starboard Throttle and we were able to navigate home.

I suspect that the two issues are related and that teh remedy is to adjust the throttle cable so that the throttle can be moved to maximum rather than max out below. Since the cable is not moving to its maximum the Sync will not work properly adn will not disengage in the normal way.

Am I on target with this or way in shallow waters?? :smt021

Has anybody had this problem? Can anybody offer a suggestion as to how to proceed? Are there any reference materials available, diagrams, procedures etc...? Point me in the right direction.

Thank you for any and all suggestions,

1/2 Dead on the Water on Long Island.

 

[Matt]

I have the same boat. First you need to see if both of your throttles are going to the wide open stop at the injector pumps. If not then look at the sync unit sometimes things break inside the unit and your throttle that goes through that unit will not throttle up or jam.

 

[billnpat]

JOEV,
Where are you on long island ??

 

[fwebster]

If it is a Glendinning synchronizer, you should be unloading the slaved throttle when you engage the synchronizer. This is particularly important with bridge boats because of the added cable length. Cable loads can cause the problem you are having.

Unloading is nothing more than advancing the slaved throttle lever as soon as the synchronizer is engaged. That takes the throttle lever, cable and linkage out of the load the synchronizer must handle to adjust the throttle on the slaved engine. When you unload the throttle, remember to re-engage it when you turn off the synchronizer by slowly moving it to idle position then back to where it catches up with the engine speed. The throttle lever/cable re-engages itself as it goes past the speed of the engine.

 

[JoeV]

We are in Manorhaven (Port Washington) at Brewer Capri. Where are you?

JOEV,
Where are you on long island ??

 

[JoeV]

Thanks to all for the tips. We resolved the problem. My mechanic found that the throttle cable connections to the engines had been "adjusted" by someone inproperly and there was no need to replace the throttle cable. After making some adjustments it is now working perfectly. Regards to all.

 

[billnpat]

We are in Manorhaven (Port Washington) at Brewer Capri. Where are you?

SOUTH SHORE COPIAGUE......:smt001