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Author Topic: drive belt for Autohelm St4000  (Read 1575 times)

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Jim Hardesty

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drive belt for Autohelm St4000
« on: June 19, 2013, 02:53:08 PM »

I replaced the drive belt on my Autohelm St4000  got the belt here

http://shop.polybelt.com/Belt-for-ST4000-Autohelm-Raymarine-Autopilot-BAT750AUTOST4000.htm

The belt skips when used hard.  The old one didn't.  I noticed the cogs are not square at the end sort of m shaped where it fits into the drive pulleys.

Where have others got replacment belts that they are happy with?

Jim
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Jim Hardesty
2001 MKII hull #1570 M35BC  "Shamrock"
sailing Lake Erie
from Commodore Perry Yacht Club
Erie, PA

Ron Hill

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Re: drive belt for Autohelm St4000
« Reply #1 on: June 19, 2013, 05:35:34 PM »

Jim : Get ahold of the Gates Belt Co and give them the # from the old belt. 

I'll bet they can help you!!  A thought
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SailingJerry

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Re: drive belt for Autohelm St4000
« Reply #2 on: June 26, 2013, 04:23:55 PM »

Jim, I replaced my belt this spring fromPolytech and it works great. One thing I noticed was that one of my rollers was frozen. Here is the address for the autohelm service manual. Hope it helps.   http://www.ganssle.com/jack/st4000.pdf
Jerry
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Jim Hardesty

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Re: drive belt for Autohelm St4000
« Reply #3 on: June 26, 2013, 07:27:53 PM »

I changed back to my old belt.  It looked OK but I have 5 seasons on it (don't know if the PO ever change it) and I use it a lot.  Well my old belt doesn't slip.  After doing some searching here I see that the belt tension is adjustable and having too much or too little will cause the belt to slip.  It did seem a little tighter.  So I don't think that anything was wrong with the new belt.  Now that I have a new belt and see how simple it is to change I'll just keep using the old belt till it shows a problem.
FWIW   I have tongue depressors (from a craft store) that I use as mixing sticks.  They worked well to gently pry the halfs of the autopilot apart.
Thanks for the replies.
Jim
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Jim Hardesty
2001 MKII hull #1570 M35BC  "Shamrock"
sailing Lake Erie
from Commodore Perry Yacht Club
Erie, PA
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