Hynautics Troubleshooting

[Teri]

We have an Ocean Alexander Mark I Classico Pilothouse Trawler (2001) that is experiencing problems with the starboard throttle. The handle doesn't engage speed until it is at least 50% forward. We tried to bleed the valves but no fluid came out despite a 100 lb pressure on the receiving tank. The system description is not very detailed and the drawings don't match the installation. We haven't found a lot of information on the "all-knowing" internet. So,

1. does anyone know of a Hynautics expert on the east coast?
2. does anyone have any input on the system and what could be wrong? What information do you need?

Can't move the boat and we musts leave the slip by the end of the year. Help!

 

[Comodave]

Welcome aboard. Sorry I can’t help but hopefully someone will be able to help.

 

[O C Diver]

Seastar owns Hynautic. While I don't know if they support the the throttle and shifting controls anymore, they have some very good authorized independent service centers that rebuild helm pumps and steer cylinders. I had rebuild work done by the company in NC. The gentleman who answered the phone and did the service work had a great deal of experience with Hynautic and still did installations. I would be surprised if one of the service centers couldn't give you information on your unit, and if necessary, rebuild components. Below is a listing for the authorized service centers.

SeaStar Solutions

Ted

 

[porman]

Is there an engine synchronizer in the system? That could be the source of the problem.

 

[Martin J]

Firstly try to bleed at the throttle slave unit on the engine. Sounds like your trying to bleed at the shifter, that just takes the residual air out after bleeding. When you bleed the slave all sorts of dirty stuff will come out , keep going to clean antifreeze (no additives) comes out. Make sure you use clean a/freeze with- out antileak additives. These additives stop the system functioning properly. Make sure you change throttle lever positions while bleeding. Once done then open the tiny bleed screw on the throttle body to let the last bit of air out. do the lower helm first then the upper. Any problems P.M. me I'll send my tel #. Done a few systems over the years on my boats. Once on line they tend to work excellently. , far more reliable than cables or electronics etc.

 

[Teri]

Gary answered the phone at Marine Control Systems in Franklin, NC (thanks for the link, Ted) and, after a short description of the issues, he told us what to do. He also gave input on the exact antifreeze to use and lots of other good information. Lots of it mirrored your input, Martin. Will post after we get through the steps that Gary gave us. Thanks, all!