Through hull pickups
#1
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Location: Cedar Springs MI
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Through hull pickups
Motors are currently out of my cat, and I am trimming my through hull water pickups that are currently 1 5/8" below the bottom. Do I cut them flush with the bottom and then cut a water groove in front of them if needed. Or have the leading edge flush with the bottom and leave the back 1/4 inch to 1/2 inch below??? Need an answer soon
#5
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Since it is already through your hull/bottom, I would trim what you have to avoid glass work. Pickups on my DCB go through the bottom also, mine has a groove that leads to the pickup, water pressure at 125mph cracked the glass and did some damage where it was ground thin. If it was mine I would just angle the pickup starting with a 1/4" at the rear, flush in front and forget grinding a groove. Even better, grind the front half flush and angle it back half way. If your pressure is too high just whittle away at them.
I am surprised that thing didn't porpoise like mad, my prediction is you will pick up 4 or 5mph. I cant imagine the amount of drag on those, look at what labbing props does...
I am surprised that thing didn't porpoise like mad, my prediction is you will pick up 4 or 5mph. I cant imagine the amount of drag on those, look at what labbing props does...
Last edited by JRider; 04-22-2017 at 06:19 AM.
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The pickups were not sealed with anything. They just have a gasket and we're through bolted. I was able to completely remove them and cut them out of the boat. They will be flush at the leading edge and angle cut to be 1/4" deep at the trailing edge. When I reinstall do you think I should use some 5200 to make sure water doesn't make it into the coring? I am hoping for a 5mph hour gain with just the pick up fix. However adding another 100hp a side so it will be hard to tell for sure...
#7
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Good plan and you can always add the water channel groove if needed!
4200 is plenty plenty strong, I would not use 5200. We picked our boat off the trailer when trying to remove the extension boxes with 4200, can't imagine 5200!
4200 is plenty plenty strong, I would not use 5200. We picked our boat off the trailer when trying to remove the extension boxes with 4200, can't imagine 5200!
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its even worse,,I needed alot of heat on the boxes plate to soften it enough.totally sucked,almost hurt the gel coat but did get lucky.
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When I parted out my formula with number V's I had installed the boxes with 5200. When we tried to removed them it took a 10,000lb 4wd diesel high low doing neutral drops to rip them off. When they finally gave it took gel coat and plywood with it. Crazy stuff!!!