Shuts off and re-se...
 
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Shuts off and re-sets?

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(@wattsofun)
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Joined: 1 year ago
Posts: 2
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We have a 2001 21' Duffy.  Suddenly, and for the first time ever, the motor just stopped while running in forward.  But then when we brought the throttle lever back to neutral, then put it back in forward it ran again.  But then did it again several times.

It did this yesterday morning after running for 20 minutes at about 3/4 to 7/8 throttle.  So we turned around and it did it about 6 times on the way back to the dock.  Each time it was the same.  As soon as it stopped we put it back in neutral, then back in forward again and it ran.

Since it took 20 minutes before it happened the first time we were wondering if it has something to do with heat.  The motor was warm.  But the fan on the motor was running.

We did run much slower on the way home.  The first few times the occurrences were moments apart then as we went home the occurrences were further apart.  I don't know if it is because we were going slower and maybe the motor was less warm.

Have any of you experienced this before?  We would appreciate any ideas on how to diagnose and repair.

This topic was modified 1 year ago 2 times by WattsOFun

   
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 Rob
(@robhouston)
Trusted Member
Joined: 3 years ago
Posts: 62
 

 

I don’t think this is a motor heat issue, since if it was, it would take a while to cool down before running again.

I suspect that it’s a throttle or controller issue.  I’d start with checking the micro switches on the throttle to see if they are working correctly, then check the plugs/wiring to the controller.   Note that if the controller loses connection with the throttle, even momentarily, it shuts down the motor immediately, and the throttle has to be moved through neutral before the motor will run again.  Finally, this could also be a controller issue.

I’ll keep my fingers crossed that it’s an issue with the micro switches, since this is a common issue and relatively easy to fix.  The controller is ridiculously expensive, so hopefully, your problem is somewhere before the controller.

Good luck, and please let us know the outcome.


   
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(@duf21)
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Joined: 8 months ago
Posts: 7
 

Hopefully you resolved your issue! Im experiencing similar issues. Started with original Curtis Throttle, tried a rebuilt one, same isdues.

Bought the new Alltrax controller and Throttle, and having same issues.

Have you isolated the problematic part, were you able to get and replace with new parts?

Any guidance appreciated!

DUF21

email duffy4sale@att.net

 

 


   
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 Rob
(@robhouston)
Trusted Member
Joined: 3 years ago
Posts: 62
 

@duf21 Okay, this is good information to add to your other post.   The fact that your old and new controllers didn't change anything suggests that the problem is indeed the motor.  I suspect the motor is overheating, opening the internal motor temperature limit switch.  When the motor cools down, the limit switch closes and the motor will run until it overheats again.  

Especially if the motor is fairly old, I'd pull it and take it to a good motor repair shop for diagnosis and repair.

Good luck!


   
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(@duf21)
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Joined: 8 months ago
Posts: 7
 

@robhouston 

Thanks so much for your reply Rob


   
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(@mr-wocohose)
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Joined: 3 months ago
Posts: 2
 

Hello All,

I have a 1998 16' Duffy having Throttle Electrical issues also. I replaced all 6 , 6 volt batteries and new micro switched in the throttle. Also replaced the rheostat and that made no difference. I purchased the boat about a year ago and was told the charger, throttle 7 brain was replaced 6 months before I purchased. I started to have issues after I used it a few times. The problem I'm having is..... about 1/2 throttle or more it starts to surge and full it shuts down. Once i put it in neutral it works again. Here's a catch I've havent read about yet. As were moving along, If I hit the horn or turn on the Navigation lights, it also kills the throttle. I turn off the lights and put it in gear and the motor works. Also the amp gauge is also bouncing around when moving along. I don't have much more hair to pull out !!!! The motor was also rebuilt, charger is working, each battery has 5.8 volts or better, 35 volts overall. I had a Duffy tech look at it , and said my batteries were low. But that's not the case.

PLEASE HELP !!!!!!!


   
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 Rob
(@robhouston)
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Joined: 3 years ago
Posts: 62
 

@mr-wocohose Okay, so for me, the big clue is that when you use one of the 12V accessories, it kills power to the motor.

Do you 12V accessories run off of two of the 6V batteries, or do you have a 36VDC to 12VDC converter?  If the former, I'd suggest checking the two 6V batteries with a load tester.  If they check out fine, then I'd start looking for some kind of short between the 12V and 36V circuits.  For some reason, it seems that when using 12V accessories, it pulls the voltage down below what your controller/motor will tolerate.  

What make/model controller do you have?

Good luck with this troubleshooting!

 


   
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(@mr-wocohose)
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Joined: 3 months ago
Posts: 2
 

The controller is the Duffty Infa-Speed. And the 12 v accesories pull from the first two batteries.


   
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