Drilling 3/4" hole in side of boat....Tips/Advice

DaleH

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A couple of ideas and observations:

I use a hole saw to cut through the hull for the through hull. Dozens done and never a problem. Use silicone sealer and stainless hose clamps. Screw the pump to a piece of cutting board (or HDPE), to keep the pump upright and out of the debris. Replacement will be a breeze. If you get vibration, glue the HDPE to the hull with a dollop of silicone sealant.
... just be aWARE that not silicones are made for application or use on aluminum, where the curing agent can corrode tin ...
 

mervebitanem

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My bilge pump hose runs up to the top of the transom Tutuapp 9Apps Showbox where I have a 90 degree barbed fitting that points over the top of the transom.
 
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cyclops2

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I always put all bilge pumps in a piece of S S screen BAG closed at the top with a electrical Ty Rap. keeps all the tiny bits of fish line & other junk from clogging the pump. Bits of small baits also can be stopped.

I DO NOT ever wire any bilge pumps to the battery directly. Reason is heavy rains WILL WILL run the battery down to far and cause it to fail too quickly. I go to the boat and stand on a seat next to the control panel. Start the engine first to a fast idle. THEN turn on the pump. My small boat battery is about 8 years old & still fine.
 
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