1984 46.6 Need to remove GlenDinning

It's Glendinning...... Maybe that'll help your search.
(mod edit: name corrected)

https://www.glendinningprods.com/products/complete-controls/

That said, if you don't know how the system works, how do you know it's the problem?

You need to take the cable that's going from the port throttle to the glenndenning and go straight to the engine with it (may require a new longer cable or shorter). You then need to remove the cable going from the starboard engine from the glenndenning.

WHAT problem are you having and why do you feel it's the glenndenning?

I think you really need a professional to fix it.

Bad cap or fill neck.

Look for a split in the top of the tank or a bad gasket. Fuel cooler will generally push fuel out into the water, BUT it's easy enough to pressure check.

Unlikely there's a problem with the tank. Given the amount of water he claims the source is bound to be rain and washing, which puts the problem on deck. Given the age of the boat the most likely weak link is worn threads in the cap or the connection with the fill neck.

Yep, KISS, although it still needs a path inside the neck.

The old 46.6 Bertrams had the toe stubbing deck fills where the cap was 3/4" above the deck level, I'm almost positive. And was a cap like on a 2 liter........so usually didn't matter if the O-rings were bad on them. I dealt with a 54' Bertram from that era and cockpit tank had a split in the top of the tank and same issue.

The fuel vent absolutely can, if you’re sucking 60 gallons an our of fuel out of the tank, you’re also sucking the same amount of air in through that vent.

+1 in theory however I have doubts about the vent allowing that amount of water in from running. This sounds like rain or washdown water which brings be back to the fuel cap and/or fill neck as the vent won't have changed or been messed with since new so the problem should have existed since new. The fill cap and fuel neck could be worn each time the boat was fueled. You probably won't like this but maybe taste the water in the racor to see if it's fresh or salt (as an alternative put the water in a pan and let it dry to see if salt is left behind).

You can use a saltwater pool or saltwater fishtank test strip to check the salinity of the water. These are also useful for other boat leaks and checking aftercooler drains for salt indicating a leaking core.

Sounds better for the taste buds.