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If your gennaker tack line has a tendency to unexpectedly release, clean and lube it first. then upgrade the torsion springs in your harken model 150 cam cleat.
If your gennaker tack line has a tendency to unexpectedly release, clean and lube it first. then upgrade the torsion springs in your harken model 150 cam cleat.
The J70 Gennaker Tack Line Cam Cleat is the standard model 150 from Harken. The internal springs are used to grip an unloaded line by applying a minimum tension to close the pawls.
In preparation for the Gennaker set, the Gennaker Tack Line is commonly pre-cleated to a mark on the line. When the Gennaker is fully hoisted and the sprit is out, the pre-cleated Tack Line should have the Gennaker clew in the proper position.
Harken offers guidance on cleaning, rebuilding and upgrading the springs in the model 150 cam cleat. See youtube video link.
Of special interest at the 2:04 time mark is the suggestion regarding additional springs.
See pic above for details of the 150 Cam-Matic® Cleat Rebuild Kit - 1993 and newer. Harken part number 150KIT.
Apply tape to aluminum baseplate and pawls
Apply tape to aluminum baseplate and pawls
If only interested in installing additional torsion springs, carefully apply vinyl tape to the pawls (4) and aluminum baseplate (6). This keeps the pawls in place when handling and inadvertently releasing the Delrin ball bearings. Then carefully remove only the red plastic "cam" baseplate (8) with a flat blade screwdriver. Preferably perform this task at a work bench with a tray to catch any loose parts.
install 2nd torsion spring
install 2nd torsion spring
See pic below of the 2nd torsion spring installed on the right side. Make sure you install the same number of torsion springs for each pawl. 1:1, 2:2, etc.
Standard Cam Cleat Spring
Standard Cam Cleat Spring
You can also purchase just the individual torsion springs, Harken part number MS-006. They are less than a dollar each at Fisheries Supply.
You can install 2 or more torsion springs on the aluminum pawl posts. You'll need a total of four torsion springs to double up a complete cam cleat assembly.
The additional torsion springs will increase the grip on the line when it is unloaded. And reduce the tendency for the cam cleat to accidently release while your crew is frantically trying to set the Gennaker.
After cleaning, rebuilding or installing additonal torsion springs, re-install the cam cleat onto the boat deck. Of particular note is Harkens advice "Install cam on boat. Do not over-tighten mounting screws; pawls will bind".
Finding the right tension on the mounting screws requires a bit of trial and error. Tighten just enough to attach the cam cleat firmly to the boat deck but not so tight that it causes the cam cleat pawls to "stick" when rotated by hand.
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