Drive Belt For Autohelm 4000 - Page 2 - SailNet Community
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post #11 of 16 Old 07-22-2008
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They are available on Ebay. Do a search in boat parts for Autohelm.

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post #12 of 16 Old 09-15-2008
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I have an ST 4000 that had gotten "grabby". Sporadically it wouldn't allow the wheel to turn, even though the clutch always remained fully disengaged. This is no fun when you are getting ready to make the turn into your slip. Turns out the steel inside the belts rusts, causing bubbles under the belt, which then grab at the housing.

One of my old spare belts was labeled Synchroflex AT5/750. Ebay was indeed my friend. Found an exact match from Polytech's Polybelt eBay store - as I see has been mentioned in previous posts. Their AT5-750 was a perfect fit. At $12.99 + S&H, a way better deal than the old Ray/Autohelm replacement kit, which was over $50.

Also, at one point years back one of the internal wheels broke off at its stand base. Drilling and throughbolting made it as good (better?) than new.
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post #13 of 16 Old 12-06-2008
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Hello,
First check if the belt is slipping ,if it is you can adjust the belt on the rear of the unit ,there is a small round plastic cover symetric to the clutch lever,under the cover is the adjustment screw ,you need an adjustment tool with 2 pins to loose the nut and an allen wrench to adjust the center,then lock the nut to keep the adjustment.Do not tension the belt to much as it will not completely disengage. The belt tension have influence on retaining the clutch lever disengaged.

Jean
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post #14 of 16 Old 11-25-2010
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I've tracked down, what I believe to be the same drive belts Raymarine use in their ST4000 autopilots. They're metric belts and are made from urathane. Due to a bone-head act by myself (see: Sailing the Dream for the details), I've had to upgrade to the SPX-5 autopilot. As a consequence, I have three spare belts (I've already sold two) for the ST4000 Plus unit. If you're interested in purchasing one of these spares, contact me and I'll provide details. By the way, they're far less expensive than the mark-up made by Raymarine (at $52 a piece!).

Last edited by neophytecruiser; 11-25-2010 at 10:52 AM.
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post #15 of 16 Old 07-02-2011
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Quote:
Originally Posted by wdtracy View Post
From another thread on the same subject:


As anybody who has tried to replace the drive belt knows, Ratheon no longer sells the replacement belt. A belt is available from the supplier below at about $16.00. It has steel cords and is a neoprene

Poly Tech Design
26 West First St
Clifton N.J. 07011
800 859 7659
tHIER NUMBER IS: B10AT5/750 FPS
cOMPARABLE TO::
425 syncroflex AT 5/750

Just ordered this today.

Hope it works to get a few more years out of our Autohelm 4000!
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post #16 of 16 Old 07-02-2011
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Replacement Belts for Autohelm 4000

For those of you with the older Autohelm 4000 in need of replacement belts, I found the identical belt for far cheaper than what was charged for the, now discontinued, replacement belts.

The belt that is identical to the original is a metric belt of urethane composition. The part number is JAS T5/750-10 metric timing belt. You should be able to find these at any industrial belt supplier. They cost about 90% less than the belts that were marketed by Autohelm. If you have difficulties finding these, contact me and I will supply the contact information for a supplier in California.
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