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Coil too Bouyant.

vernt

New member
Have a Whites SurfMaster PI with an unweighted coil. Like to use it sometimes in the water, but its too bouyant for me(makes me wish I had gotten one with a weighted coil). Has anyone devised a weight setup that can be attached and detached when wanted, other than a sock with sand in it? Thanks.
 
Use a small sack of lead bird shot from a shot gun shell. Something like #7 1/2. The detector can only see the shot, 1 pellet at a time. One pellet is just too small for the detector to respond to. Because of this, it can't see a bag of them either. Try it out.

Sand does OK too, but try not to use mineralized sand.

Tie this small sack to the top of the coil at the clevis.
 
Had that problem trying to use an old 5000Di a long time ago.

Take the coil off the shaft lay it on a table or bench covered with wax paper. make a cardboard ring that fits around the coil with 1 1/2" space, and at least 1" higher than the coil. Cover the coil with saran wrap. Pour rubber sealant like SPL over the coil. Let it cure, when cured take the ring off, lift the rubber off the coil, cut out the hole for the shaft and cable. You can trim the rubber down until it just holds the coil at neutral bouancy. the coil weight will stay on the poil, and can be slipped off when working the dry sand. If the coil doesn't stay on, get one of those tiny suction cups from the dollar store and silicone it into the top of the weight between the cover & weight. Mine worked well, gave it away to a friend when I moved to Colorado. If you've got questions I can make a drawing for you.
 
Thanks for your response. I'd like to try your suggestion. I'm having a little problem visualizing it. Any drawing you have would be very helpful. Thanks again.
Vernt
 
Vernt,

My first Whites PI had an unweighted loop. I weighted it by placing marbles inside the lower rod. Works fine but can be a pain to remove when the sand packs in it.
 
I used some of these on a mod I did for my Nautilus. Basically its a thick heavy ring with an allan bolt through it to tighten against whatever its surrounding, and they would be easy to remove when you didnt want them on there. They are pretty inexpensive as well, the (expensive) stainless ones I used were less than $5 apiece , so the regulars should be even less. I would think one or 2 would be enough weight positioned right above the coil on the lower rod.Heres a pic of one.
 
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