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Old 08-11-2023 | 11:03 PM
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Saw this link as well. Good layout photo at the end.

re drilling water pickup holes on bravo 1 drive
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Old 08-12-2023 | 05:18 AM
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Originally Posted by Tartilla
If you keep them on for the next 6-8weeks of season, I think you would be able to focus better with a proper solution, and not be pressured to cut corners to keep it seaworthy.

bravo 1 low water intake

Interesting perspective about drilling new holes. Merc suggests 4 vs 8. So maybe reviewing the whole plan of water inlet...maybe there is a better location to have them.

If you want to drill out the original locations, make sure you drill at the correct angle. Account for the shape of the inlet holes.

I would use smallest drill bits strong enough to do the job without breaking.

Try a sharp pointy center punch to align the drill bit.

Increase drill bit size until you've reached your desired hole size.
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Don't discount a little Dremel type tool with a small round burr to open up the angled inlet portion for the holes.
The main reason why I wanted to re open the side water holes is when it's low tide having the only one water pickup in the nose of the drive can create overheating issues from debris and muddy water.It doesnt happen often but it has happened occasionally even with the drives almost on trailer position. I think having side pickups also could help that situation .

Last edited by 35fountain; 08-12-2023 at 08:12 AM.
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Old 08-14-2023 | 10:10 AM
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Took the boat out this weekend. No issues with nose cone. Marine Tex held it on.

Last edited by 35fountain; 08-14-2023 at 05:43 PM.
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Old 08-20-2023 | 10:29 AM
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At 75mph marine tex started to come off. I think the water entering the inlet of the nose cone for cooling is somehow is getting between the inlet and the putty holding the nose cone on even though I cannot see an area exacty where though.its towards the low part mid section of pics posted previously. Starboard drive putty cracked on the side....here we go.
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Old 08-21-2023 | 01:56 PM
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Torch those off as suggested, DA the drives smooth and spray them.
I'd imagine torching those off would be a 30 or so minute affair.
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Old 08-22-2023 | 01:01 PM
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Got one cone off. Looks like it was never a lwp there. Looks like they created it. Now what?
the side water inlets has screw in brass plugs.but some are stripped.





Last edited by 35fountain; 08-22-2023 at 01:13 PM.
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Old 08-22-2023 | 01:05 PM
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Old 08-22-2023 | 01:51 PM
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Wow. Honestly, at this point I'm looking for new lower cases or complete lowers.

Heck, worth the price just to get new cases - https://www.sterndrivereplacement.co.../lower-unit-4/
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Old 08-22-2023 | 02:31 PM
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I was told to cut the tube flush with the drive. Plug it up with marine tex. Then remove all water inlet side plugs from drive sand paint and your good to go. A lot cheaper than new drive lowers. I think those were SEI?? if not mistaken, A OEM Mercruiser drive lower will not cost only $1199.00 I have heard good and bad about SEI. Why are the so inexpensive?

Last edited by 35fountain; 08-22-2023 at 03:02 PM.
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Old 08-22-2023 | 03:24 PM
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Originally Posted by 35fountain
I was told to cut the tube flush with the drive. Plug it up with marine tex. Then remove all water inlet side plugs from drive sand paint and your good to go. A lot cheaper than new drive lowers. I think those were SEI?? if not mistaken, A OEM Mercruiser drive lower will not cost only $1199.00 I have heard good and bad about SEI. Why are the so inexpensive?
With some heat on the allen plugs, you may get a few out by the threads. Otherwise drill them out.

...no wonder you never got anywhere with little drill bit by hand.
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Great progress so far.
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