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Old 23 February 2015, 00:39   #21
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ncp, what should I look for inside the hole to know if it needs to be sealed with resin?

My boat comes with the shittiest manual of all and it doesn't even talk about engine mounting, much less about drilling holes.

The Suzuki motor comes with a decent owner's manual and I am also buying the service manual as well.
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Old 23 February 2015, 02:44   #22
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The motor's manual says that the bottom of the boat should be within 0~25mm from the anti-cavitation plate. I am at 30mm. Should I worry too much about the 5mm?
Shim it up at least 10mm. You should be able to do that without cutting anything. You can make a permanent shim so should you desire.

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ncp, what should I look for inside the hole to know if it needs to be sealed with resin?
Wood? When you drill it you will know. Don't breathe the dust.
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Old 25 February 2015, 02:16   #23
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Shim it up at least 10mm. You should be able to do that without cutting anything. You can make a permanent shim so should you desire.
I am thinking of using a strip of 3/4 inch starboard to shim it up. Will that work?

I've seen people shimming up their motors using plywood, so I figure that starboard will hold at least as well as plywood.

I found out today that I can lift the motor by myself, so I'll ask my kid to insert the shim while I hold the motor up.
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Old 25 February 2015, 02:24   #24
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I asked Mercury about drilling on the floor, and they sent me this drawing with a note:

"Anywhere in the gray shaded areas will be suitable to drill without concern."

If you look closely, there are four weird horizontal bars within the gray area. Could those be some sort of beams underneath? That seems unlikely considering that this is such a small boat.

Anyway, I'll start a-drilling tomorrow and will find out with the help of a bent hanger.
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Old 27 February 2015, 02:56   #25
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I am thinking of using a strip of 3/4 inch starboard to shim it up. Will that work?

I've seen people shimming up their motors using plywood, so I figure that starboard will hold at least as well as plywood.

I found out today that I can lift the motor by myself, so I'll ask my kid to insert the shim while I hold the motor up.
You can use most anything to shim it up. Really it is the bolts that hold it in place with the clamps too of course.
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Old 27 February 2015, 11:47   #26
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The motor's manual says that the bottom of the boat should be within 0~25mm from the anti-cavitation plate. I am at 30mm. Should I worry too much about the 5mm?
You will produce 3/16" more drag than the manual recommends. The performance different will probably be negligible.

For aftermarket consoles, I've notched the side of them before to bring them closer to the tube. It really opens up the aisle a lot more, which is great when you've got divers with tanks. However, you'll have to make some brackets, since you'll be cutting away the mounting lip of the console.

As a tip too, we'd usually do Nauticus smart-tabs on all RIBs under 5 meters, especially if you're running a 6gal or 12gal at the stern of the vessel.
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Old 05 March 2015, 23:34   #27
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Drilled eight 1/2 inch holes today for mounting the cooler seat

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It looks like the deck has wood inside, so I will seal the holes with epoxy resin first. Bought a Western System epoxy kit from west marine. Hopefully it will have enough resin for my purposes - I will have about 25 holes on the boat.

Earlier I also drilled a few small 'exploratory holes' to find out how much space I have under the deck. So I need to seal them with epoxy and fill with 3M 5200

Here's the cooler seat

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I'll mount it using these toggle bolts, as recommended by the owner of defender.com

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They take 1/4 inch bolts. Hopefully will be enough for the seat.
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Old 05 March 2015, 23:35   #28
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Old 05 March 2015, 23:39   #29
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I found the easiest way to drill on the deck is to use a small cobalt bit to drill a pilot hole, then use a frostner bit to scrape open the gelcoat until I hit the wood, then use a regular drill bit to finish the job. No need for blue tape to protect the gelcoat from cracking.
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Old 05 March 2015, 23:40   #30
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Also bought a battery from west marine. Now I can raise the motor.

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